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1ldr3cela | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>To inhibit the growth of tumours, identify the compounds used from the following :</p>
<p>A. EDTA</p>
<p>B. Coordination Compounds of Pt</p>
<p>C. D - Penicillamine</p>
<p>D. Cis - Platin</p>
<p>Choose the correct answer from the option given below :</p> | [{"identifier": "A", "content": "A and B Only"}, {"identifier": "B", "content": "C and D Only"}, {"identifier": "C", "content": "B and D Only"}, {"identifier": "D", "content": "A and C Only"}] | ["C"] | null | <p>Cis-platin is [Pt(NH$$_3$$)$$_2$$Cl$$_2$$]; cis platin and other complexes of pt are used to inhibit the growth of tumours.</p> | mcq | jee-main-2023-online-30th-january-morning-shift | 1,486 |
1ldsto6om | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>The sum of bridging carbonyls in $$\mathrm{W(CO)_6}$$ and $$\mathrm{Mn_2(CO)_{10}}$$ is ____________.</p> | [] | null | 0 | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1lekr69nw/ee35d929-1f38-43b5-a367-913b1c93baf0/970ef1d0-b57a-11ed-9ad9-3b1cedbe69d8/file-1lekr69o0.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1lekr69nw/ee35d929-1f38-43b5-a367-913b1c93baf0/970ef1d0-b57a-11ed-9ad9-3b1cedbe69d8/fi... | integer | jee-main-2023-online-29th-january-morning-shift | 1,487 |
1lgq460xg | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>The mismatched combinations are</p>
<p>A. Chlorophyll - Co</p>
<p>B. Water hardness - EDTA</p>
<p>C. Photography $$-\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$$</p>
<p>D. Wilkinson catalyst $$-\left[\left(\mathrm{Ph}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\right]$$</p>
<p>E. Chelating ligand - D-Penicillamine</p>... | [{"identifier": "A", "content": "A and E Only"}, {"identifier": "B", "content": "D and E Only"}, {"identifier": "C", "content": "A and C Only"}, {"identifier": "D", "content": "A, C, and E Only"}] | ["C"] | null | Let's analyze each combination :
<br/><br/>
A. Chlorophyll - Co : Mismatched. Chlorophyll has a magnesium (Mg) ion at its center, not cobalt (Co).
<br/><br/>
B. Water hardness - EDTA : Correct match. EDTA (ethylenediaminetetraacetic acid) is used to treat water hardness by chelating metal ions like Ca²⁺ and Mg²⁺.
<br/>... | mcq | jee-main-2023-online-13th-april-morning-shift | 1,488 |
1lgsy5qq9 | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.</p>
<p>Assertion A : $$\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}$$ absorbs at lower wavelength of light with respect to $$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \... | [{"identifier": "A", "content": "$$\\mathrm{A}$$ is false but $$\\mathrm{R}$$ is true"}, {"identifier": "B", "content": "Both $$\\mathrm{A}$$ and $$\\mathrm{R}$$ are true but $$\\mathrm{R}$$ is NOT the correct explanation of $$A$$"}, {"identifier": "C", "content": "Both $$\\mathrm{A}$$ and $$\\mathrm{R}$$ are true and ... | ["A"] | null | <p>Assertion A : $$\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}$$ absorbs at a lower wavelength of light with respect to $$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}$$.</p>
<p>Given that H<sub>2</sub>O is a stronger field ligand than Cl<sup>-</... | mcq | jee-main-2023-online-11th-april-evening-shift | 1,489 |
1lgsyenrz | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>Match List I with List II</p>
<p><style type="text/css">
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overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-II, B-IV, C-I, D-III"}, {"identifier": "B", "content": "A-II, B-III, C-I, D-IV"}, {"identifier": "C", "content": "A-III, B-IV, C-II, D-I"}, {"identifier": "D", "content": "A-II, B-III, C-IV, D-I"}] | ["B"] | null | <p>In this problem, we are matching chemical compounds with their corresponding color. Let's go over each one :</p>
<p>A. $$Mg(NH_4)PO_4$$ - Magnesium ammonium phosphate is white in color, so A matches with II.</p>
<p>B. $$K_3[Co(NO_2)_6]$$ - Potassium hexanitritocobaltate(III) is a yellow complex, so B matches wit... | mcq | jee-main-2023-online-11th-april-evening-shift | 1,490 |
1lguz4cl9 | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>The complex that dissolves in water is :</p> | [{"identifier": "A", "content": "$$\\mathrm{Fe}_{4}\\left[\\mathrm{Fe}(\\mathrm{CN})_{6}\\right]_{3}$$"}, {"identifier": "B", "content": "$$\\left(\\mathrm{NH}_{4}\\right)_{3}\\left[\\mathrm{As}\\left(\\mathrm{Mo}_{3} \\mathrm{O}_{10}\\right)_{4}\\right]$$"}, {"identifier": "C", "content": "$$\\mathrm{K}_{3}\\left[\\ma... | ["D"] | null | <b>Option A :</b> $$\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}$$ (Prussian Blue)
<br/><br/>Prussian blue is a very stable and intensely colored compound, but it is not soluble in water. The individual cyanide ligands and the iron ions are bonded together strongly, which results in a crystalline struc... | mcq | jee-main-2023-online-11th-april-morning-shift | 1,491 |
lsaomryz | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | Given below are two statements :<br/><br/>
<b>Statement (I)</b> : Dimethyl glyoxime forms a six-membered covalent chelate when treated with $\mathrm{NiCl}_2$ solution in presence of $\mathrm{NH}_4 \mathrm{OH}$.
<br/><br/>
<b>Statement (II)</b> : Prussian blue precipitate contains iron both in $(+2)$ and $(+3)$ oxidatio... | [{"identifier": "A", "content": "Statement I is false but Statement II is true"}, {"identifier": "B", "content": "Both Statement I and Statement II are true"}, {"identifier": "C", "content": "Statement I is true but Statement II is false"}, {"identifier": "D", "content": "Both Statement I and Statement II are false"}] | ["A"] | null | <p>Let's analyze each statement separately:</p>
<p><b>Statement (I)</b>: <img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lsdsc28r/e86e1b13-4ea7-4adf-ac4a-c9d48b1f117d/ac1182b0-c6d0-11ee-baa5-f1dd456edfec/file-6y3zli1lsdsc28s.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/... | mcq | jee-main-2024-online-1st-february-evening-shift | 1,492 |
jaoe38c1lscqbsh5 | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>Identity the incorrect pair from the following :</p> | [{"identifier": "A", "content": "Haber process - Iron\n"}, {"identifier": "B", "content": "Polythene preparation - $$\\mathrm{TiCl}_4, \\mathrm{Al}\\left(\\mathrm{CH}_3\\right)_3$$\n"}, {"identifier": "C", "content": "Photography - AgBr\n"}, {"identifier": "D", "content": "Wacker process - $$\\mathrm{Pt} \\mathrm{Cl}_2... | ["D"] | null | <p>The catalyst used in Wacker's process is $$\mathrm{PdCl_2}$$</p> | mcq | jee-main-2024-online-27th-january-evening-shift | 1,493 |
jaoe38c1lsfjtkwr | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>In which one of the following metal carbonyls, $$\mathrm{CO}$$ forms a bridge between metal atoms?</p> | [{"identifier": "A", "content": "$$\\left[\\mathrm{Os}_3(\\mathrm{CO})_{12}\\right]$$\n"}, {"identifier": "B", "content": "$$\\left[\\mathrm{Ru}_3(\\mathrm{CO})_{12}\\right]$$\n"}, {"identifier": "C", "content": "$$\\left[\\mathrm{Mn}_2(\\mathrm{CO})_{10}\\right]$$\n"}, {"identifier": "D", "content": "$$\\left[\\mathrm... | ["D"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lt3uztjm/a5ae2787-1cd7-4957-948e-25a2f03823e1/73e96320-d527-11ee-997d-17b90c907b5b/file-6y3zli1lt3uztjn.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/6y3zli1lt3uztjm/a5ae2787-1cd7-4957-948e-25a2f03823e1/73e96320-d527-11ee-99... | mcq | jee-main-2024-online-29th-january-morning-shift | 1,495 |
jaoe38c1lsfpafnm | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>A reagent which gives brilliant red precipitate with Nickel ions in basic medium is</p> | [{"identifier": "A", "content": "dimethyl glyoxime\n"}, {"identifier": "B", "content": "sodium nitroprusside\n"}, {"identifier": "C", "content": "meta-dinitrobenzene\n"}, {"identifier": "D", "content": "neutral $$\\mathrm{FeCl}_3$$"}] | ["A"] | null | <p>$$\mathrm{Ni}^{2+}+2 \mathrm{dmg}^{-} \rightarrow\left[\mathrm{Ni}(\mathrm{dmg})_2\right]$$</p>
<p>Rosy red/Bright Red precipitate</p> | mcq | jee-main-2024-online-29th-january-evening-shift | 1,496 |
1lsgydxdm | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>Choose the correct statements from the following :</p>
<p>(A) Ethane-1, 2-diamine is a chelating ligand.</p>
<p>(B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite.</p>
<p>(C) Cyanide ion is used as ligand for leaching of silver.</p>
<p>(D) Phosphine act as a ligand in Wilki... | [{"identifier": "A", "content": "(B), (C), (E) only"}, {"identifier": "B", "content": "(A), (D), (E) only"}, {"identifier": "C", "content": "(C), (D), (E) only"}, {"identifier": "D", "content": "(A), (B), (C) only"}] | ["D"] | null | <p>Let's examine each statement for correctness:</p>
<p>(A) Ethane-1, 2-diamine is a chelating ligand.</p>
<p>Ethane-1,2-diamine, also known as ethylenediamine (en), has two nitrogen atoms that can coordinate to a metal ion, forming a ring structure in the process. Because it can form these two bonds, it can "chelate"... | mcq | jee-main-2024-online-30th-january-morning-shift | 1,497 |
lv5gsy29 | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>Given below are two statements:</p>
<p>Statement I: $$\mathrm{N}\left(\mathrm{CH}_3\right)_3$$ and $$\mathrm{P}\left(\mathrm{CH}_3\right)_3$$ can act as ligands to form transition metal complexes.</p>
<p>Statement II: As N and P are from same group, the nature of bonding of $$\mathrm{N}\left(\mathrm{CH}_3\right)_3$$... | [{"identifier": "A", "content": "Both Statement I and Statement II are incorrect.\n"}, {"identifier": "B", "content": "Both Statement I and Statement II are correct.\n"}, {"identifier": "C", "content": "Statement I is incorrect but Statement II is correct.\n"}, {"identifier": "D", "content": "Statement I is correct but... | ["D"] | null | <p><strong>Answer:</strong> Option D - Statement I is correct but Statement II is incorrect.</p>
<p><strong>Explanation:</strong></p>
<p>Statement I: $$\mathrm{N}\left(\mathrm{CH}_3\right)_3$$ (trimethylamine) and $$\mathrm{P}\left(\mathrm{CH}_3\right)_3$$ (trimethylphosphine) can indeed act as ligands to form transi... | mcq | jee-main-2024-online-8th-april-morning-shift | 1,498 |
lv5gsxvf | chemistry | coordination-compounds | application-of-coordination-compound-and-organometallic-compounds | <p>Match List I with List II</p>
<p><style type="text/css">
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overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-IV, B-I, C-II, D-III\n"}, {"identifier": "B", "content": "A-I, B-II, C-III, D-IV\n"}, {"identifier": "C", "content": "A-II, B-III, C-IV, D-I\n"}, {"identifier": "D", "content": "A-III, B-I, C-II, D-IV"}] | ["D"] | null | <p>To match List I with List II correctly, we need to identify the colors associated with each compound.</p>
<p>Let's analyze each compound:</p>
<p><b>1. </b> $$\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH_2O}$$ - This is known as Prussian Blue.</p>
<p><b>2. </b> $$\left[\mathrm{Fe}(\mathr... | mcq | jee-main-2024-online-8th-april-morning-shift | 1,499 |
NneRvARPcpPIxjCg | chemistry | coordination-compounds | coordination-number | One mole of the complex compound Co(NH<sub>3</sub>)<sub>5</sub>Cl<sub>3</sub>, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO<sub>3</sub> solution to yield two moles of AgCl (s). The structure of the complex is : | [{"identifier": "A", "content": "[Co(NH<sub>3</sub>)<sub>3</sub>Cl<sub>3</sub>]. 2NH<sub>3</sub>"}, {"identifier": "B", "content": "[Co(NH<sub>3</sub>)<sub>4</sub>Cl<sub>2</sub>] Cl. NH<sub>3</sub>"}, {"identifier": "C", "content": "[Co(NH<sub>3</sub>)<sub>4</sub>Cl] Cl<sub>2</sub>. NH<sub>3</sub>"}, {"identifier": "D"... | ["D"] | null | $$Co\,{\left( {N{H_3}} \right)_5}C{l_3}\,\,\leftrightharpoons\,\,{\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \right]^{ + 2}} + 2C{l^ - }$$
<br><br>$$\therefore$$ $$\,\,\,\,$$ Structure is $$\,\,\,\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \right]C{l_2}$$
<br><br>Now $$\,\,\,\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \r... | mcq | aieee-2003 | 1,500 |
FyrfArQlQ6aVkS0J | chemistry | coordination-compounds | coordination-number | In the coordination compound, K<sub>4</sub>[Ni(CN)<sub>4</sub>], the oxidation state of nickel is : | [{"identifier": "A", "content": "0"}, {"identifier": "B", "content": "+1"}, {"identifier": "C", "content": "+2"}, {"identifier": "D", "content": "-1"}] | ["A"] | null | Let the $$O.$$ No of $$Ni$$ in
<br><br>$$\,\,{K_4}\left[ {Fe{{\left( {CN} \right)}_6}} \right]\,\,$$ $$be$$ $$=x$$ then
<br><br>$$4\left( { + 1} \right) + x + \left( { - 1} \right) \times 4 = 0$$
<br><br>$$\,\,\,\,\,\,\,\,\,\,\,\,\,\, \Rightarrow 4 + x - 4 = 0$$
<br><br>$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$x=0$$ | mcq | aieee-2003 | 1,502 |
BZ38P7EdQ4ozjTng | chemistry | coordination-compounds | coordination-number | The coordination number of central metal atom in a complex is determined by : | [{"identifier": "A", "content": "the number of ligands around a metal ion bonded by sigma bonds"}, {"identifier": "B", "content": "the number of only anionic ligands bonded to the metal ion"}, {"identifier": "C", "content": "the number of ligands around a metal ion bonded by sigma and pi- bonds both "}, {"identifier": ... | ["A"] | null | The coordination number of central metal atom in a complex is equal to number of monovalent ligands, twice the number of bidentate ligands and so on, around the metal ion bonded by coordinate bonds. Hence coordination number $$=$$ no. of $$\sigma $$ bonds formed by metals with ligands | mcq | aieee-2004 | 1,503 |
MpWtq2oy9tnQz8Ep | chemistry | coordination-compounds | coordination-number | The oxidation state of Cr in [Cr(NH<sub>3</sub>)<sub>4</sub>Cl<sub>2</sub>]<sup>+</sup> is : | [{"identifier": "A", "content": "+3 "}, {"identifier": "B", "content": "+2"}, {"identifier": "C", "content": "+1"}, {"identifier": "D", "content": "0"}] | ["A"] | null | Oxidation state of $$Cr$$ in $${\left[ {Cr{{\left( {N{H_3}} \right)}_4}C{l_2}} \right]^ + }.$$
<br><br>Let it be $$x,\,\,1 \times x + 4 \times 0 + 2 \times \left( { - 1} \right) = 1$$
<br><br>Therefore $$\,\,\,$$ $$x=3.$$ | mcq | aieee-2005 | 1,504 |
FD0P0S8Y7sknRr5S | chemistry | coordination-compounds | coordination-number | How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral
complex with a Ca<sup>2+</sup> ion? | [{"identifier": "A", "content": "Six"}, {"identifier": "B", "content": "Three"}, {"identifier": "C", "content": "One"}, {"identifier": "D", "content": "Two"}] | ["C"] | null | $$EDTA$$ has hexadentate four donar $$O$$ atoms and $$2$$ donar $$N$$ atoms and for the formation of octahedral complex one molecule is required | mcq | aieee-2006 | 1,505 |
Cn2wgMcrjcJG9d4E | chemistry | coordination-compounds | coordination-number | The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)]NO<sub>2</sub> (where (en) is ethylene diamine) are, respectively, | [{"identifier": "A", "content": "6 and 2 "}, {"identifier": "B", "content": "4 and 2"}, {"identifier": "C", "content": "4 and 3"}, {"identifier": "D", "content": "6 and 3"}] | ["D"] | null | In the given complex we have two bidentate ligands (i.e. $$en$$ and $${C_2}{O_4}$$ ), so coordination number of $$E$$ is $$6$$ $$\left( {2 \times 2 + 1 \times 2 = 6} \right)$$
<br><br>Let the oxidation state of $$E$$ in complex be $$x,$$
<br><br>then $$\left[ {x + \left( { - 2} \right) = 1} \right]$$ or $$x - 2 = 1... | mcq | aieee-2008 | 1,506 |
MLrMp0HwUL2LURQX | chemistry | coordination-compounds | coordination-number | A solution containing 2.675g of CoCl<sub>3</sub>. 6NH<sub>3</sub> (molar mass = 267.5 g mol<sup>–1</sup>) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO<sub>3</sub> to give
4.78 g of AgCl (molar mass = 143.5 g mol<sup>–1</sup>). The formula of the complex i... | [{"identifier": "A", "content": "[Co(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>3</sub> "}, {"identifier": "B", "content": "[CoCl<sub>2</sub>(NH<sub>3</sub>)<sub>4</sub>]Cl "}, {"identifier": "C", "content": "[CoCl<sub>3</sub>(NH<sub>3</sub>)<sub>3</sub>] "}, {"identifier": "D", "content": "[CoCl(NH<sub>3</sub>)<sub>5</sub>]Cl... | ["A"] | null | $$\mathop {CoC{l_3}.6N{H_3}}\limits_{2.675g} \buildrel \, \over
\longrightarrow xC{l^ - }$$
<br><br>$$xC{l^ - } + AgN{O_3}\buildrel \, \over
\longrightarrow \mathop {x\,AgCl \downarrow }\limits_{4.78g} $$
<br><br>Number of moles of the complex
<br><br>$$ = {{2.675} \over {267.5}} = 0.01$$ moles
<br><br>Number of mol... | mcq | aieee-2010 | 1,507 |
Fl6mTAWICJ141OJv | chemistry | coordination-compounds | coordination-number | The equation which is balanced and represents the correct product(s) is : | [{"identifier": "A", "content": "[Mg (H<sub>2</sub>O)<sub>6</sub> ]<sup>2+</sup> + (EDTA)<sup>4-</sup> $$\\buildrel {excess\\,NaOH} \\over\n \\longrightarrow $$ [Mg (EDTA) ]<sup>2+</sup> + 6H<sub>2</sub>O"}, {"identifier": "B", "content": "CuSO<sub>4 </sub> + KCN $$\\to$$ K<sub>2</sub> [Cu (CN)<sub>4</sub>] + K<sub>2</... | ["D"] | null | <p>(A) [Mg (H<sub>2</sub>O)<sub>6</sub> ]<sup>2+</sup> + (EDTA)<sup>4-</sup> $$\buildrel {excess\,NaOH} \over
\longrightarrow $$ [Mg (EDTA) ]<sup>2+</sup> + 6H<sub>2</sub>O</p>
<p>The above equation is incorrect because the product formed would be [Mg (EDTA)]<sup>2−</sup> .</p>
<p>(B) CuSO<sub>4 </sub> + KCN $$\to$$ K... | mcq | jee-main-2014-offline | 1,508 |
s2RtTKpizKRKhZjzKd4Ww | chemistry | coordination-compounds | coordination-number | Which of the following is an example of homoleptic complex? | [{"identifier": "A", "content": "[Co(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>3</sub>"}, {"identifier": "B", "content": "[Pt(NH<sub>3</sub>)<sub>2</sub>Cl<sub>2</sub>]\n"}, {"identifier": "C", "content": "[Co(NH<sub>3</sub>)<sub>4</sub>Cl<sub>2</sub>]"}, {"identifier": "D", "content": "[Co(NH<sub>3</sub>)<sub>5</sub>Cl]Cl<su... | ["A"] | null | <p>Homoleptic complexes are those compounds in which all the ligands bound to the central metal are identical. Thus, these types of complexes have only one type of ligands. In the complex [Co(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>3</sub> , central atom Co has ammonia ligands as all six.</p>
<p>Heteroleptic complexes are ... | mcq | jee-main-2016-online-10th-april-morning-slot | 1,509 |
Uv7Ejwn6P9fmRJY5iIDOv | chemistry | coordination-compounds | coordination-number | [Co<sub>2</sub>(CO)<sub>8</sub>] displays : | [{"identifier": "A", "content": "one Co\u2212Co bond, six terminal CO and two bridging CO"}, {"identifier": "B", "content": "one Co\u2212Co bond, four terminal CO and four bridging CO"}, {"identifier": "C", "content": "no Co\u2212Co bond, six terminal CO and two bridging CO"}, {"identifier": "D", "content": "no Co\u221... | ["A"] | null | <p>The structure of [Co<sub>2</sub>(CO)<sub>8</sub>] is</p>
<img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l3o11y38/985a9119-d4a9-4c5d-b2a7-69f430657e13/32f3a230-dd81-11ec-aecc-85c667aff515/file-1l3o11y39.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l3o11y38/985a9119-d4a9-4c... | mcq | jee-main-2017-online-9th-april-morning-slot | 1,510 |
FEA2E7hJEgrOHByr | chemistry | coordination-compounds | coordination-number | The oxidation states of Cr in [Cr(H<sub>2</sub>O)<sub>6</sub>]Cl<sub>3</sub>, [Cr(C<sub>6</sub>H<sub>6</sub>)<sub>2</sub>] and K<sub>2</sub>[Cr(CN)<sub>2</sub>(O)<sub>2</sub>(O<sub>2</sub>)(NH<sub>3</sub>)] respectively are : | [{"identifier": "A", "content": "+3, 0 and +4"}, {"identifier": "B", "content": "+3, +4 and +6 "}, {"identifier": "C", "content": "+3, +2 and +4"}, {"identifier": "D", "content": "+3, 0 and +6"}] | ["D"] | null | Assume oxidation state of Cr in all the compounds = x
<br><br>(i)$$\,\,\,$$ In [Cr(H<sub>2</sub>O)<sub>6</sub>] Cl<sub>3</sub> oxidation state of Cr is
<br><br>x + 0 $$ \times $$ 6 + ($$-$$1 $$ \times $$ ) = O
<br><br>$$ \Rightarrow \,\,\,\,\,$$ x + 0 $$-$$ 3 = O
<br><br>$$ \Rightarrow \,\,\,\,$$ x = + 3
<br><br>(ii... | mcq | jee-main-2018-offline | 1,511 |
guuG6KZsCG56DlUZZcrEJ | chemistry | coordination-compounds | coordination-number | The coordination number of Th in K<sub>4</sub>[Th(C<sub>2</sub>O<sub>4</sub>)<sub>4</sub>(OH<sub>2</sub>)<sub>2</sub>] is :
<br/>(C<sub>2</sub>O$${_4^{2 - }}$$ = Oxalato) | [{"identifier": "A", "content": "14"}, {"identifier": "B", "content": "10"}, {"identifier": "C", "content": "8"}, {"identifier": "D", "content": "6"}] | ["B"] | null | Oxalato (C<sub>2</sub>O<sub>4</sub><sup>2–</sup>) is a bidentate and H<sub>2</sub>O is unidentate
ligand.
<br><br>4C<sub>2</sub>O<sub>4</sub><sup>2–</sup> creates 8 covalent bonds.
<br><br>2H<sub>2</sub>O creates 2 covalent bonds.
<br><br>$$ \therefore $$ Around Th 10 coordinate covalent bonds will be present. | mcq | jee-main-2019-online-11th-january-evening-slot | 1,512 |
czWAhovnDSC6EQ8yCEOxI | chemistry | coordination-compounds | coordination-number | The maximum possible denticities of a ligand
given below towards a common transition and
inner-transition metal ion, respectively, are :
<picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266189/exam_images/vf0n6r6uka2s10yd2mgr.webp"/><img src="data:image/png;base... | [{"identifier": "A", "content": "8 and 6"}, {"identifier": "B", "content": "8 and 8"}, {"identifier": "C", "content": "6 and 8"}, {"identifier": "D", "content": "6 and 6"}] | ["C"] | null | The maximum possible denticities of the given
ligand towards transition metal ion is 6.
<br><br>The maximum possible denticities of the given
ligand
towards inner transition metal ion is 8. | mcq | jee-main-2019-online-9th-april-evening-slot | 1,514 |
OFSyftywEhWNx8diCt3rsa0w2w9jx82u9nv | chemistry | coordination-compounds | coordination-number | The coordination numbers of Co and Al in [Co(Cl)(en)<sub>2</sub>]Cl and K<sub>3</sub>[Al(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>], respectively, are :
(en = ethane-1, 2-diamine) | [{"identifier": "A", "content": "3 and 3"}, {"identifier": "B", "content": "6 and 6"}, {"identifier": "C", "content": "5 and 3"}, {"identifier": "D", "content": "5 and 6"}] | ["D"] | null | Here in [Co(Cl)(en)<sub>2</sub>]Cl
<br>'Cl' is monodentate so one coordinate linkage will be made with Co.
<br>'en' is bidentate so two coordinate linkage will be made with Co. There are two 'en ' present so 4 coordinate linkage will be made with Co.
<br>$$ \therefore $$ Total 5 coordinate linkage will be made with Co ... | mcq | jee-main-2019-online-12th-april-evening-slot | 1,515 |
U9pIO8hAj8aGvQyeHY7k9k2k5hmb42z | chemistry | coordination-compounds | coordination-number | Complexes (ML<sub>5</sub>) of metals Ni and Fe have
ideal square pyramidal and trigonal
bipyramidal grometries, respectively. The sum
of the 90°, 120° and 180° L-M-L angles in the
two complexes is ________. | [] | null | 20 | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734265938/exam_images/cjlmxcpcbslgpurv4ams.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Coordination Compounds Question 190 English Explanation 1">
<... | integer | jee-main-2020-online-8th-january-evening-slot | 1,516 |
XkOY8m1EYiVdx4XoY61klue9flp | chemistry | coordination-compounds | coordination-number | Number of bridging CO ligands in [Mn<sub>2</sub>(CO)<sub>10</sub>] is __________. | [] | null | 0 | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734265558/exam_images/zjijmo3vffdlvn010ue4.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2021 (Online) 26th February Morning Shift Chemistry - Coordination Compounds Question 161 English Explanation">
... | integer | jee-main-2021-online-26th-february-morning-slot | 1,519 |
ZvnyGOPrXDIt8v5xDm1kmlny6cf | chemistry | coordination-compounds | coordination-number | The total number of unpaired electrons present in the complex K<sub>3</sub>[Cr(oxalate)<sub>3</sub>] is _____________. | [] | null | 3 | In $${K_3}\left[ {Cr\left( {{C_2}{O_4}} \right)} \right]$$, oxidation number of Cr :<br><br>$$3( + 1) + x + 3( - 2) = 0$$<br><br>$$ \Rightarrow x = + 3$$<br><br>$$ \therefore $$ $${}_{24}C{r^{ + 3}} = \left[ {Ar} \right]3{d^3}$$<br><br>$$ \therefore $$ Number of unpaired electrons = 3 | integer | jee-main-2021-online-18th-march-morning-shift | 1,520 |
GkRzsetVzXfZ4CMKJD1kmm0zhdr | chemistry | coordination-compounds | coordination-number | The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO<sub>4</sub> . 5H<sub>2</sub>O, respectively, are : | [{"identifier": "A", "content": "5 and 1"}, {"identifier": "B", "content": "4 and 1"}, {"identifier": "C", "content": "6 and 5"}, {"identifier": "D", "content": "6 and 4"}] | ["B"] | null | CuSO<sub>4</sub>.5H<sub>2</sub>O $$ \Rightarrow $$ [Cu(H<sub>2</sub>O)<sub>4</sub>]SO<sub>4</sub>.H<sub>2</sub>O<br><br>
In CuSO<sub>4</sub>.5H<sub>2</sub>O, Cu is co-ordinated with 4 water molecule and two more oxygen atom from sulphate ion and fifth water molecule is hydrogen bonded.<br><br>
So secondary valency = ... | mcq | jee-main-2021-online-18th-march-evening-shift | 1,521 |
1krutgjlq | chemistry | coordination-compounds | coordination-number | Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula CrCl<sub>3</sub>.3NH<sub>3</sub>.3H<sub>2</sub>O reacts with excess of silver nitrate. The number of chloride ions satisfying the secondary valency of the metal ion is ______________. | [] | null | 0 | Mole of AgCl precipitated is equal to mole of Cl<sup>-</sup> present in ionization sphere.<br><br> <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264769/exam_images/ejsajhli3y9isrjulhed.webp"><source media="(max-width: 500px)" srcset="https://res.cloudinary.co... | integer | jee-main-2021-online-25th-july-morning-shift | 1,522 |
1krx564o8 | chemistry | coordination-compounds | coordination-number | Which one of the following metal complexes is most stable? | [{"identifier": "A", "content": "[Co(en)(NH<sub>3</sub>)<sub>4</sub>]Cl<sub>2</sub>"}, {"identifier": "B", "content": "[Co(en)<sub>3</sub>]Cl<sub>2</sub>"}, {"identifier": "C", "content": "[Co(en)<sub>2</sub>(NH<sub>3</sub>)<sub>2</sub>]Cl<sub>2</sub>"}, {"identifier": "D", "content": "[Co(NH<sub>3</sub>)<sub>6</sub>]C... | ["B"] | null | Complex [Co(en)<sub>3</sub>]Cl<sub>2</sub> is most stable complex among the given complex compounds because more number of chelate rings are present in this complex as compare to others.<br><br>(1) [Co(en)(NH<sub>3</sub>)<sub>4</sub>]Cl<sub>2</sub> 1 chelate ring<br><br>(2) [Co(en)<sub>3</sub>]Cl<sub>2</sub> 3 chelate ... | mcq | jee-main-2021-online-25th-july-evening-shift | 1,523 |
1ks1jqo15 | chemistry | coordination-compounds | coordination-number | 3 moles of metal complex with formula Co(en)<sub>2</sub>Cl<sub>3</sub> gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is ___________.<br/><br/>(Round off to the nearest integer) | [] | null | 6 | $$3\left[ {Co{{(en)}_2}C{l_2}} \right]Cl + \mathop {AgN{o_3}}\limits_{(excess)} \to \mathop {3AgCl}\limits_{(white\,ppt.)} $$<br><br>Secondary valency of Co = 6<br><br>(C. N.) | integer | jee-main-2021-online-27th-july-evening-shift | 1,524 |
1kticxdxx | chemistry | coordination-compounds | coordination-number | The denticity of an organic ligand, biuret is : | [{"identifier": "A", "content": "2"}, {"identifier": "B", "content": "4"}, {"identifier": "C", "content": "3"}, {"identifier": "D", "content": "6"}] | ["A"] | null | Biuret ligand is
<br><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264919/exam_images/ivotpxdnbktuepftnoj1.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Coordination Compounds Question 131 Eng... | mcq | jee-main-2021-online-31st-august-morning-shift | 1,526 |
1ktn2g581 | chemistry | coordination-compounds | coordination-number | The sum of oxidation states of two silver ions in [Ag(NH<sub>3</sub>)<sub>2</sub>] [Ag(CN)<sub>2</sub>] complex is _____________. | [] | null | 2 | [Ag(NH<sub>3</sub>)<sub>2</sub>][Ag(CN)<sub>2</sub>] complex dissociates into [Ag(NH<sub>3</sub>)<sub>2</sub>]<sup>+</sup> and [Ag(CN)<sub>2</sub>].<br/><br/>Oxidation of Ag in [Ag(NH<sub>3</sub>)<sub>2</sub>]<sup>+</sup><br/><br/>Ag + 0 $$\times$$ 2 = + 1<br/><br/>Ag = + 1<br/><br/>Oxidation state of Ag in [Ag(CN)<su... | integer | jee-main-2021-online-1st-september-evening-shift | 1,527 |
1l54yfkx5 | chemistry | coordination-compounds | coordination-number | <p>Given below are two statements.</p>
<p>$$\bullet$$ Statement I : In CuSO<sub>4</sub> . 5H<sub>2</sub>O, Cu-O bonds are present.</p>
<p>$$\bullet$$ Statement II : In CuSO<sub>4</sub> . 5H<sub>2</sub>O, ligands coordinating with Cu(II) ion are O-and S-based ligands.</p>
<p>In the light of the above statements, choose ... | [{"identifier": "A", "content": "Both Statement I and Statement II are correct."}, {"identifier": "B", "content": "Both Statement I and Statement II are incorrect."}, {"identifier": "C", "content": "Statement I is correct but Statement II is incorrect."}, {"identifier": "D", "content": "Statement I is incorrect but Sta... | ["C"] | null | <p>Statement I is true but statement II is false. Only
oxygen atom forms a Co-ordinate bond with Cu<sup>+2</sup> in
CuSO<sub>4</sub>.5H<sub>2</sub>O</p>
<img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l5dy7n6s/10b431e5-7fe8-4395-8793-bab6867552e3/ae435550-ff8e-11ec-84f2-63556e5b6b22/file-1l5dy7n6t.png?... | mcq | jee-main-2022-online-29th-june-evening-shift | 1,528 |
1l6jnd2q8 | chemistry | coordination-compounds | coordination-number | <p>The conductivity of a solution of complex with formula $$\mathrm{CoCl}_{3}\left(\mathrm{NH}_{3}\right)_{4}$$ corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is __________.</p> | [] | null | 3 | In 1: 1 type of electrolyte the ions have $+1$ and $-1$ charge on them <br/><br/>
$\therefore$ Possible compound is $\rightarrow\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+} \mathrm{Cl}^{-}$
<br/><br/>Oxidation state of central atom represents the total number of primary valency
<br/><br/... | integer | jee-main-2022-online-27th-july-morning-shift | 1,530 |
1l6kptft0 | chemistry | coordination-compounds | coordination-number | <p>Low oxidation state of metals in their complexes are common when ligands :</p> | [{"identifier": "A", "content": "have good $$\\pi$$-accepting character"}, {"identifier": "B", "content": "have good $$\\sigma$$-donor character"}, {"identifier": "C", "content": "are having good $$\\pi$$-donating ability"}, {"identifier": "D", "content": "are having poor $$\\sigma$$-donating ability"}] | ["A"] | null | Ligands like : CO, are sigma donor and $\pi$-acceptor and they make stronger bond with lower oxidation state metal ion, in this case back bonding is more effective | mcq | jee-main-2022-online-27th-july-evening-shift | 1,531 |
1ldohwegg | chemistry | coordination-compounds | coordination-number | <p>Which of the following are the example of double salt?</p>
<p>A. $$\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}$$</p>
<p>B. $$\mathrm{CuSO}_{4}\cdot 4 \mathrm{NH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$$</p>
<p>C. $$\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathr... | [{"identifier": "A", "content": "A, B and D only"}, {"identifier": "B", "content": "B and D only"}, {"identifier": "C", "content": "A and B only"}, {"identifier": "D", "content": "A and C only"}] | ["D"] | null | $A=\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}$ - double salt
<br/><br/>B. $\mathrm{CuSO}_{4} \cdot 4 \mathrm{NH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$
$=\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{SO}_{4} \cdot \mathrm{H}_{2} \mathrm{O} ... | mcq | jee-main-2023-online-1st-february-morning-shift | 1,533 |
1lguzwndi | chemistry | coordination-compounds | coordination-number | <p>The set which does not have ambidentate ligand(s) is :</p> | [{"identifier": "A", "content": "$$\\mathrm{C}_{2} \\mathrm{O}_{4}{ }^{2-}, \\mathrm{NO}_{2}{ }^{-}, \\mathrm{NCS}^{-}$$"}, {"identifier": "B", "content": "$$\\mathrm{C}_{2} \\mathrm{O}_{4}{ }^{2-}$$, ethylene diammine, $$\\mathrm{H}_{2} \\mathrm{O}$$"}, {"identifier": "C", "content": "$$\\mathrm{NO}_{2}^{-}, \\mathrm{... | ["B"] | null | <b>Option A :</b>
<br/><br/>- $$\mathrm{C}_{2} \mathrm{O}_{4}{ }^{2-}$$ (Oxalate) is a bidentate ligand. It always binds through its two oxygen atoms.
<br/><br/>- $$\mathrm{NO}_{2}{ }^{-}$$ (Nitrite) is an ambidentate ligand. It can coordinate either through nitrogen or oxygen.
<br/><br/>- $$\mathrm{NCS}^{-}$$ (Thiocya... | mcq | jee-main-2023-online-11th-april-morning-shift | 1,535 |
1lh29t8vt | chemistry | coordination-compounds | coordination-number | <p>Number of ambidentate ligands in a representative metal complex $$\left[\mathrm{M}(\mathrm{en})(\mathrm{SCN})_{4}\right]$$ is ___________.</p>
<p>[en = ethylenediamine]</p> | [] | null | 4 | <p>Ambidentate ligands are ligands that can bond to a metal atom through two different atoms. They can attach through one site or the other, but not both at the same time.</p>
<p>In the given complex $$[\mathrm{M}(\mathrm{en})(\mathrm{SCN})_{4}]$$:</p>
<ul>
<li><p>$$\mathrm{en}$$, or ethylenediamine, is a bidentate lig... | integer | jee-main-2023-online-6th-april-morning-shift | 1,536 |
jaoe38c1lsc5vuvd | chemistry | coordination-compounds | coordination-number | <p>Yellow compound of lead chromate gets dissolved on treatment with hot $$\mathrm{NaOH}$$ solution. The product of lead formed is a :</p> | [{"identifier": "A", "content": "Tetraanionic complex with coordination number six\n"}, {"identifier": "B", "content": "Neutral complex with coordination number four\n"}, {"identifier": "C", "content": "Dianionic complex with coordination number six\n"}, {"identifier": "D", "content": "Dianionic complex with coordinati... | ["D"] | null | <p>Lead chromate (
$$\mathrm{PbCrO}_4$$
) dissolves in hot NaOH solution to form products due to a chemical reaction. The reaction involves the formation of a compound where lead (
$$\mathrm{Pb}$$
) is coordinated by hydroxide ions (
$$\mathrm{OH}^-$$
).</p>
<p>The balanced chemical reaction is:</p>
<p>
$$\mathrm{PbCrO... | mcq | jee-main-2024-online-27th-january-morning-shift | 1,537 |
1lsg80hy9 | chemistry | coordination-compounds | coordination-number | <p>The coordination geometry around the manganese in decacarbonyldimanganese $$(0)$$ is</p> | [{"identifier": "A", "content": "Trigonal bipyramidal\n"}, {"identifier": "B", "content": "Square pyramidal\n"}, {"identifier": "C", "content": "Square planar\n"}, {"identifier": "D", "content": "Octahedral"}] | ["D"] | null | <p>$$\mathrm{Mn_2(CO)_{10}}$$</p>
<p><img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lspuyoax/462ab325-1bf8-46b5-86b5-0fdc71f1c3c0/5af61080-cd74-11ee-9be1-85ca54b9efcb/file-6y3zli1lspuyoay.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/6y3zli1lspuyoax/462ab325-1bf8-46b5-86... | mcq | jee-main-2024-online-30th-january-evening-shift | 1,538 |
lv5gs17g | chemistry | coordination-compounds | coordination-number | <p>An octahedral complex with the formula $$\mathrm{CoCl}_3 \cdot \mathrm{nNH}_3$$ upon reaction with excess of $$\mathrm{AgNO}_3$$ solution gives 2 moles of $$\mathrm{AgCl}$$. Consider the oxidation state of $$\mathrm{Co}$$ in the complex is '$$x$$'. The value of "$$x+n$$" is __________.</p> | [{"identifier": "A", "content": "6"}, {"identifier": "B", "content": "5"}, {"identifier": "C", "content": "3"}, {"identifier": "D", "content": "8"}] | ["D"] | null | <p>To solve this problem, we need to determine the oxidation state of cobalt ($$x$$) and the number of ammonia molecules ($$n$$) in the complex $$\mathrm{CoCl}_3 \cdot \mathrm{nNH}_3$$, given that it produces 2 moles of $$\mathrm{AgCl}$$ upon reaction with excess $$\mathrm{AgNO}_3$$.</p>
<p>First, let's write the reac... | mcq | jee-main-2024-online-8th-april-morning-shift | 1,539 |
9ZY5gOQdqatXf70b | chemistry | coordination-compounds | crystal-field-theory-(cft) | The most stable ion is : | [{"identifier": "A", "content": "[Fe(OH)<sub>3</sub>]<sup>3-</sup>"}, {"identifier": "B", "content": "[Fe(Cl)<sub>6</sub>]<sup>3-</sup>"}, {"identifier": "C", "content": "[Fe(CN)<sub>6</sub>]<sup>3-</sup>"}, {"identifier": "D", "content": "[Fe(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup>"}] | ["C"] | null | The cyano and hydroxo complexes are far more stable than those formed by halide ion. This is due to the fact that $$C{N^ - }$$ and $$O{H^ - }$$ are strong lewis bases (nucleophiles). Further $${\left[ {Fe{{\left( {OH} \right)}_5}} \right]^{3 - }}$$ is not formed. hence most stable ion is $${\left[ {Fe{{\left( {CN} \ri... | mcq | aieee-2002 | 1,540 |
Pw6f7UHc6R1TzVSM | chemistry | coordination-compounds | crystal-field-theory-(cft) | In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of $$\Delta _o$$ be the highest? | [{"identifier": "A", "content": "[Co(CN)<sub>6</sub>]<sup>3\u2212</sup> "}, {"identifier": "B", "content": "[Co(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>]<sup>3\u2212</sup> "}, {"identifier": "C", "content": "[Co(H<sub>2</sub>O)<sub>6</sub>]<sup>3+ </sup>"}, {"identifier": "D", "content": "[Co(NH<sub>3</sub>)<sub>6</sub>... | ["A"] | null | In octahedral complex the magnitude of $${\Delta _o}$$ will be highest in a complex having strongest ligand. Of the given ligands $$C{N^ - }$$ is strongest so $${\Delta _o}$$ will be highest for $${\left( {Co{{\left( {CN} \right)}_6}} \right)^{3 - }}.$$ Thus option $$(a)$$ is correct. | mcq | aieee-2008 | 1,542 |
svPpDst4r3r0aDg5 | chemistry | coordination-compounds | crystal-field-theory-(cft) | Which of the following compounds is not colored yellow? | [{"identifier": "A", "content": "K<sub>3</sub>[Co(NO<sub>2</sub>)<sub>6</sub>]"}, {"identifier": "B", "content": "(NH<sub>4</sub>)<sub>3</sub>[As(Mo<sub>3</sub>O<sub>10</sub>)<sub>4</sub>]"}, {"identifier": "C", "content": "BaCrO<sub>4</sub>"}, {"identifier": "D", "content": "Zn<sub>2</sub>[Fe(CN)<sub>6</sub>]"}] | ["D"] | null | Zn<sub>2</sub>[Fe(CN)<sub>6</sub>] is white in color as it does not have unpaired
electrons. | mcq | jee-main-2015-offline | 1,544 |
gF6Zz0zRliURejj7un5gP | chemistry | coordination-compounds | crystal-field-theory-(cft) | Identify the correct trend given below : (Atomic No.=Ti : 22, Cr : 24 and Mo : 42)
| [{"identifier": "A", "content": "$$\\Delta $$<sup>o</sup> of [Cr(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> >\n<br><br>[Mo(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> and\n<br><br>$$\\Delta $$<sup>o</sup> of [Ti(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup> > [Ti(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup>"}, {"identifier... | ["C"] | null | <p>$$\Delta$$<sub>0</sub> of complex [Mo(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> is greater than that of [Cr(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup>. It is due to the fact that Mo<sup>2+</sup> belongs to second row transition element while Cr<sup>2+</sup> is first row transition element.</p>
<p>Magnitude of crystal... | mcq | jee-main-2016-online-9th-april-morning-slot | 1,545 |
Y2UXFleT6aLkgyNK4nLNY | chemistry | coordination-compounds | crystal-field-theory-(cft) | Two complexes [Cr(H<sub>2</sub>O)<sub>6</sub>]Cl<sub>3</sub> (A) and [Cr(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>3</sub> (B) are violet and yellow coloured, respectively. The <b>incorrect</b> statement regarding them is : | [{"identifier": "A", "content": "$$\\Delta $$<sub>0</sub> values of (A) and (B) are calculated from the energies of violet and yellow light, respectively "}, {"identifier": "B", "content": "both are paramagnetic with three unpaired electrons"}, {"identifier": "C", "content": "both absorb energies corresponding to their... | ["A"] | null | NH<sub>3</sub> is a strong field ligand.
<br><br>H<sub>2</sub>O is weak field ligand.
<br><br>Let $$\Delta $$<sub>violet</sub> is the crystal field splitting energy of complex A and $$\Delta $$<sub>yellow</sub> is for complex B.
<br><br>$$ \therefore $$ $$\Delta $$<sub>yellow</sub> > $$\Delta $$<su... | mcq | jee-main-2019-online-9th-january-morning-slot | 1,546 |
akZurTFxlgV1qckvCp3rsa0w2w9jx55grkw | chemistry | coordination-compounds | crystal-field-theory-(cft) | Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of
the following splitting patterns? (relative orbital energies not on scale). | [{"identifier": "A", "content": "<picture><source media=\"(max-width: 320px)\" srcset=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734266403/exam_images/rhy5f7yfrjiu3hwt6lq3.webp\"><img src=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734265843/exam_images/ghtpzoq0obogxjkkyx13.webp\" style=\"max-width... | ["A"] | null | The field becomes square planar and the order
of energy is
<br>$${d_{{x^2} - {y^2}}} > {d_{xy}} > {d_{{z^2}}} > {d_{zx}} = {d_{yz}}$$ | mcq | jee-main-2019-online-12th-april-morning-slot | 1,547 |
nFoa49GsjG2yyQYcOj3rsa0w2w9jx54ur5b | chemistry | coordination-compounds | crystal-field-theory-(cft) | The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is :
<picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734263773/exam_images/sia2u1gtdthwhuo3phrx.webp"/><img src="data:image/png;base64,UklGRlYSAABXRUJQVlA... | [{"identifier": "A", "content": "[Fe(phen)<sub>3</sub>]<sup>2+</sup>"}, {"identifier": "B", "content": "[Zn(phen)<sub>3</sub>]<sup>2+</sup>"}, {"identifier": "C", "content": "[Co(phen)<sub>3</sub>]<sup>2+</sup>"}, {"identifier": "D", "content": "[Ni(phen)<sub>3</sub>]<sup>2+</sup>"}] | ["A"] | null | [Fe(phen)<sub>3</sub>]<sup>2+</sup> $$ \to $$ [Fe(phen)<sub>3</sub>]<sup>3+</sup>
<br><br>Here for Fe<sup>+2</sup>(3d<sup>6</sup>) :
<br><br>CFSE = (-0.4 $$ \times $$ 4 + 0.6 $$ \times $$ 2)$$\Delta $$<sub>0</sub>
<br><br> = -0.4$$\Delta $$<sub>0</sub>
<br><br... | mcq | jee-main-2019-online-12th-april-morning-slot | 1,548 |
1ViL2MIGbWBbnq7GlV3rsa0w2w9jx0zcf9h | chemistry | coordination-compounds | crystal-field-theory-(cft) | The crystal field stabilization energy (CFSE) of [Fe(H<sub>2</sub>O)<sub>6</sub>]Cl<sub>2</sub> and K<sub>2</sub>[NiCl<sub>4</sub>] respectively, are : | [{"identifier": "A", "content": "\u2013 0.4 $$\\Delta $$<sub>0</sub> and \u2013 0.8 $$\\Delta $$<sub>t</sub>"}, {"identifier": "B", "content": "\u2013 0.6 $$\\Delta $$<sub>0</sub> and \u2013 0.8 $$\\Delta $$<sub>t</sub>"}, {"identifier": "C", "content": "\u2013 2.4 $$\\Delta $$<sub>0</sub> and \u2013 1.2 $$\\Delta $$<s... | ["A"] | null | CN of [Fe(H<sub>2</sub>O)<sub>6</sub>]Cl<sub>2</sub> = 6
<br><br>For CN = 6, CFSE = $$\left[ {{3 \over 5} \times n - {2 \over 5} \times {n_1}} \right]{\Delta _0}$$
<br><br>Here, n = number of electron in e<sub>g</sub> and
<br>n<sub>1</sub> = number of electron in t<sub>2g</sub>
<br><br>Electronic configuration of Fe<s... | mcq | jee-main-2019-online-10th-april-evening-slot | 1,549 |
gt7V2lmnkPohTlQ4MJ3rsa0w2w9jwvgdznz | chemistry | coordination-compounds | crystal-field-theory-(cft) | Three complexes,
<br/>[CoCl(NH<sub>3</sub>)<sub>5</sub>]
<sup>2+</sup>(I),
<br/>[Co(NH<sub>3</sub>)<sub>5</sub>H<sub>2</sub>O]<sup>3+</sup> (II) and
<br/>[Co(NH<sub>3</sub>)<sub>6</sub>]
<sup>3+</sup>(III)
<br/>absorb light in the visible region. The correct order of the wavelength of light absorbed by them is : | [{"identifier": "A", "content": "(III) > (I) > (II)"}, {"identifier": "B", "content": "(III) > (II) > (I)"}, {"identifier": "C", "content": "(I) > (II) > (III)"}, {"identifier": "D", "content": "(II) > (I) > (III)"}] | ["C"] | null | As in a co-ordination compound, the strong field
ligand causes higher splitting of the d-orbitals
<br><br>Also we know,
<br><br>strength of ligand $$ \propto $$ $${1 \over {{\lambda _{absorbed}}}}$$
<br><br>Order of strength of ligand
<br><br>NH<sub>3</sub> > H<sub>2</sub>O > Cl<sup>-</sup>
<br><br>Therefore decr... | mcq | jee-main-2019-online-10th-april-morning-slot | 1,550 |
HyE3ZOWLgdRdXhES5TfWN | chemistry | coordination-compounds | crystal-field-theory-(cft) | The correct order of the spin-only magnetic moment of metal ions in the following low-spin
complexes, [V(CN)<sub>6</sub>]<sup>4–</sup>,[Fe(CN)<sub>6</sub>]<sup>4–</sup>, [Ru(NH<sub>3</sub>)<sub>6</sub>]<sup>3+</sup>, and [Cr(NH<sub>3</sub>)<sub>6</sub>]<sup>2+</sup> , is : | [{"identifier": "A", "content": "V<sup>2+</sup> > Ru<sup>3+</sup> > Cr<sup>2+</sup> > Fe<sup>2+</sup>"}, {"identifier": "B", "content": "V<sup>2+</sup> > Cr<sup>2+</sup> > Ru<sup>3+</sup> > Fe<sup>2+</sup>"}, {"identifier": "C", "content": "Cr<sup>2+</sup> > V<sup>2+</sup> > Ru<sup>3+</sup> >... | ["B"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267139/exam_images/ebqzkfiw6mfograsgvcs.webp"><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264669/exam_images/n6w24i4fycs1mnb05wag.webp" style="max-width: 100%;height: auto;display: block;margi... | mcq | jee-main-2019-online-8th-april-morning-slot | 1,552 |
FfcPR8gIUJ2hhhvHGEZzh | chemistry | coordination-compounds | crystal-field-theory-(cft) | The pair of metal ions that can give a spin only magnetic moment of 3.9 BM for the complex [M(H<sub>2</sub>O)<sub>6</sub>]Cl<sub>2</sub>, is -
| [{"identifier": "A", "content": "V<sup>2+</sup> and Fe<sup>2+ </sup>"}, {"identifier": "B", "content": "V<sup>2+</sup> and Co<sup>2+</sup> "}, {"identifier": "C", "content": "Co<sup>2+</sup> and Fe<sup>2+ </sup>"}, {"identifier": "D", "content": "Cr<sup>2+</sup> and Mn<sup>2+</sup>"}] | ["B"] | null | Magnetic moment = $$\sqrt {n\left( {n + 2} \right)} $$ BM
<br><br>$$ \therefore $$ $$\sqrt {n\left( {n + 2} \right)} $$ = 3.9
<br><br>$$ \Rightarrow $$ n = 3
<br><br>$$ \therefore $$ no. of unpaired electron = 3
<br><br>H<sub>2</sub>O is weak field ligand so no pairing of electrons happens.
<br><br>Fe<sup>2+</sup> = t... | mcq | jee-main-2019-online-12th-january-morning-slot | 1,553 |
6dIx9zUiYCgIHiDh8wVey | chemistry | coordination-compounds | crystal-field-theory-(cft) | Homoleptic octahedral complexes of a metal ion 'M<sup>3+</sup>' with three monodenate ligands L<sub>1</sub>, L<sub>2</sub> and L<sub>3</sub> adsorb wavelenths in the region of green, blue and red respectively. The increasing order of the ligands strength is : | [{"identifier": "A", "content": "L<sub>3</sub> < L<sub>1</sub> < L<sub>2</sub>"}, {"identifier": "B", "content": "L<sub>3</sub> < L<sub>2</sub> < L<sub>1</sub>"}, {"identifier": "C", "content": "L<sub>1</sub> < L<sub>2</sub> < L<sub>3</sub>"}, {"identifier": "D", "content": "L<sub>2</sub> < L<sub>1... | ["A"] | null | Stronger the ligand, absorption of light having lower wavelength is more.
<br><br>Order of $$\lambda $$ : Red $$>$$ Green $$>$$ Blue
<br><br>Hence, ligand strength is L<sub>3</sub> $$<$$ L<sub>1</sub> $$<$$ L<sub>2</sub> | mcq | jee-main-2019-online-9th-january-evening-slot | 1,554 |
9qyYXzzDtwoGSFhpGFCFg | chemistry | coordination-compounds | crystal-field-theory-(cft) | The complex that has highest crystal field splitting energy ($$\Delta $$), is : | [{"identifier": "A", "content": "[Co(NH<sub>3</sub>)<sub>5</sub>(H<sub>2</sub>O)]Cl<sub>3</sub>"}, {"identifier": "B", "content": "K<sub>2</sub>[CoCl<sub>4</sub>]"}, {"identifier": "C", "content": "[Co(NH<sub>3</sub>)<sub>5</sub>Cl]Cl<sub>2</sub>"}, {"identifier": "D", "content": "K<sub>3</sub>[Co(CN)<sub>6</sub>]"}] | ["D"] | null | As complex K<sub>3</sub>[Co(CN)<sub>6</sub>] have CN<sup>$$-$$</sup> ligand which is strongfield ligand amongst the given ligands in other complexes. | mcq | jee-main-2019-online-9th-january-evening-slot | 1,555 |
HRtASpwepo7rvKHVtWjgy2xukg4mx8ci | chemistry | coordination-compounds | crystal-field-theory-(cft) | For a d<sup>4</sup> metal ion in an octahedral field, the
correct electronic configuration is : | [{"identifier": "A", "content": "$$t_{2g}^4e_g^0$$ when $$\\Delta $$<sub>0</sub> < P"}, {"identifier": "B", "content": "$$t_{2g}^3e_g^1$$ when $$\\Delta $$<sub>0</sub> > P"}, {"identifier": "C", "content": "$$e_g^2t_{2g}^2$$ when $$\\Delta $$<sub>0</sub> < P"}, {"identifier": "D", "content": "$$t_{2g}^3e_g^1$$... | ["D"] | null | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734265011/exam_images/k1vhic7ccwadldinqhoo.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2020 (Online) 6th September Evening Slot Chemistry - Coordination Compounds Question 166 English Explanation">
<... | mcq | jee-main-2020-online-6th-september-evening-slot | 1,556 |
fxBhNcSiQ0CrjgjJyUjgy2xukfq9sn6e | chemistry | coordination-compounds | crystal-field-theory-(cft) | Considering that $$\Delta $$<sub>0</sub>
> P, the magnetic moment<br/> (in BM) of [Ru(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> would be _________. | [] | null | 0 | Ru(44) : [Kr] 4d<sup>7</sup>5s<sup>1</sup>
<br><br>Ru<sup>+2</sup> = [Kr]4d<sup>6</sup>
<br><br>As $$\Delta $$<sub>0</sub>
> P,
<br><br>$$ \therefore $$ Pairing of e<sup>–</sup>s will take place.
<br><br>No. of unpaired e<sup>–</sup>s = 0
<br><br>$$ \therefore $$ Magnetic moment = 0 B.M | integer | jee-main-2020-online-5th-september-evening-slot | 1,557 |
vYz5jY82McEo24xKnBjgy2xukfi6o24i | chemistry | coordination-compounds | crystal-field-theory-(cft) | The values of the crystal field stabilization
energies for a high spin d<sup>6</sup> metal ion in
octahedral and tetrahedral fields, respectively,
are : | [{"identifier": "A", "content": "\u20130.4$$\\Delta $$<sub>0</sub>\n and \u20130.27$$\\Delta $$<sub>t</sub>"}, {"identifier": "B", "content": "\u20131.6$$\\Delta $$<sub>0</sub>\n and \u20130.4$$\\Delta $$<sub>t</sub>"}, {"identifier": "C", "content": "\u20130.4$$\\Delta $$<sub>0</sub>\n and \u20130.6$$\\Delta $$<sub>t<... | ["C"] | null | In octahedral
<img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266386/exam_images/lchnbsh2vnkb1ka6rgt6.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2020 (Online) 5th September Morning Slot Chemistry - Coordination Compounds Question 171 English E... | mcq | jee-main-2020-online-5th-september-morning-slot | 1,558 |
QiMblWxMflXS4K8haBjgy2xukfc8atg4 | chemistry | coordination-compounds | crystal-field-theory-(cft) | The Crystal Field Stabilization Energy
<br/>(CFSE) of [CoF<sub>3</sub>(H<sub>2</sub>O)<sub>3</sub>] ($$\Delta $$<sub>0</sub> < P) is : | [{"identifier": "A", "content": "-0.8 $$\\Delta $$<sub>0</sub>"}, {"identifier": "B", "content": "-0.4 $$\\Delta $$<sub>0</sub>"}, {"identifier": "C", "content": "-0.8 $$\\Delta $$<sub>0</sub> + 2P"}, {"identifier": "D", "content": "-0.4 $$\\Delta $$<sub>0</sub> + P"}] | ["B"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266167/exam_images/nhqizo2ibyig9ufpixxl.webp"><source media="(max-width: 500px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734263929/exam_images/oqvuadnbv0ojxvshjhcq.webp"><source media="(max-wid... | mcq | jee-main-2020-online-4th-september-evening-slot | 1,560 |
TZZX87DcwY7nt5j5Bfjgy2xukevjckxq | chemistry | coordination-compounds | crystal-field-theory-(cft) | Consider that a d<sup>6</sup> metal ion (M<sup>2+</sup>) forms a
complex with aqua ligands, and the spin only
magnetic moment of the complex is 4.90 BM.
The geometry and the crystal field stabilization
energy of the complex is | [{"identifier": "A", "content": "tetrahedral and \u2013 1.6 $$\\Delta $$<sub>t</sub>\n + 1P"}, {"identifier": "B", "content": "octahedral and \u20132.4 $$\\Delta $$<sub>0</sub> + 2P"}, {"identifier": "C", "content": "tetrahedral and \u20130.6 $$\\Delta $$<sub>t</sub>"}, {"identifier": "D", "content": "octahedral and \u... | ["C"] | null | Spin only magnetic moment = 4.9 = $$\sqrt {n\left( {n + 2} \right)} $$
<br><br>From this, n = 4 (unpaired electrons)
<br><br>(A) In octahedral complex: [M(H<sub>2</sub>O)<sub>6</sub>]
<sup>2+</sup>
<img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264075/exam_images/mofnlvis2bkxiwalukte.webp" style="max-... | mcq | jee-main-2020-online-2nd-september-morning-slot | 1,563 |
J670qIOJf8TCJbrQOL7k9k2k5lfxdrf | chemistry | coordination-compounds | crystal-field-theory-(cft) | The correct order of the spin-only magnetic
moments of the following complexes is :
<br/>(I) [Cr(H<sub>2</sub>O)<sub>6</sub>]Br<sub>2</sub>
<br/>(II) Na<sub>4</sub>[Fe(CN)<sub>6</sub>]
<br/>(III) Na<sub>3</sub>[Fe(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>] ($$\Delta $$<sub>0</sub> $$>$$ P)
<br/>(IV) (Et<sub>4</sub>N)<... | [{"identifier": "A", "content": "(III) > (I) > (II) > (IV)"}, {"identifier": "B", "content": "(II) $$ \\approx $$ (I) > (IV) > (III)"}, {"identifier": "C", "content": "(III) > (I) > (IV) > (II)"}, {"identifier": "D", "content": "(I) > (IV) > (III) > (II)"}] | ["D"] | null | (I) [Cr(H<sub>2</sub>O)<sub>6</sub>]Br<sub>2</sub>
<br><br>H<sub>2</sub>O is weak field ligand so it can not pair up all the electrons.
<br><br>Cr<sup>2+</sup> : [Ar] 4s<sup>0</sup>3d<sup>4</sup> ($$t_{2g}^3e{g^1}$$)
<br><br>Unpaired e<sup>–</sup> = 4
<br><br>Magnetic moment = $$\sqrt {24} $$ = 4.89 BM
<br><br>(II) Na<... | mcq | jee-main-2020-online-9th-january-evening-slot | 1,564 |
TT4o76P73fFNvO5eIk7k9k2k5ich322 | chemistry | coordination-compounds | crystal-field-theory-(cft) | [Pd(F)(Cl)(Br)(I)]<sup>2–</sup> has n number of
geometrical isomers. Then, the spin-only
magnetic moment and crystal field stabilisation
energy [CFSE] of [Fe(CN)<sub>6</sub>]<sup>n–6</sup>, respectively,
are:<br/>
[Note : Ignore the pairing energy] | [{"identifier": "A", "content": "1.73 BM and \u20132.0 $$\\Delta $$<sub>0</sub>"}, {"identifier": "B", "content": "5.92 BM and 0"}, {"identifier": "C", "content": "2.84 BM and \u20131.6 $$\\Delta $$<sub>0</sub>"}, {"identifier": "D", "content": "0 BM and \u20132.4 $$\\Delta $$<sub>0</sub>"}] | ["A"] | null | Complex [Pd(F)(Cl)(Br)(I)]<sup>2–</sup> (square planar
geometry)-has 3 geometrical isomers.
<br><br>$$ \therefore $$ n = 3
<br><br>[Fe(CN)<sub>6</sub>]<sup>n–6</sup> becomes [Fe(CN)<sub>6</sub>]<sup>3-</sup>
<br><br>Here Oxidation state of Fe = +3
<br><br>$$ \therefore $$ Fe<sup>+3</sup> = [Ar]3d<sup>5</sup>4s<sup>0</s... | mcq | jee-main-2020-online-9th-january-morning-slot | 1,565 |
XDUzg5DoQarDMuAp537k9k2k5eqefcq | chemistry | coordination-compounds | crystal-field-theory-(cft) | Among the statements(a)-(d) the incorrect ones are :<br/>
(a) Octahedral CO(III) complexes with strong fields ligands have very high magnetic moments.<br/>
(b) When $$\Delta $$<sub>0</sub> < P, the d-electron configuration of Co(III) in an octahedral complex is $$t_{eg}^4e_g^2$$<br/>
(c) Wavelength of light absorbed... | [{"identifier": "A", "content": "(a) and (b) only"}, {"identifier": "B", "content": "(b) and (c) only "}, {"identifier": "C", "content": "(c) and (d) only "}, {"identifier": "D", "content": "(a) and (d) only"}] | ["D"] | null | (a) Co<sup>3+</sup> with strong field complex forms low
magnetic moment complex.
<br><br>(b) If $$\Delta $$<sub>0</sub> < P configuration of Co<sup>3+</sup> will be $$t_{eg}^4e_g^2$$.
<br><br>(c) Splitting power of ethylenediamine (en) is
greater than fluoride (F<sup>–</sup>) ligand therefore more
energy absorbed by... | mcq | jee-main-2020-online-7th-january-evening-slot | 1,566 |
uGblS1FzMMqObBG6QR7k9k2k5dynlpn | chemistry | coordination-compounds | crystal-field-theory-(cft) | The theory that can completely/properly explain the nature of bonding in [Ni(Co)<sub>4</sub>] is : | [{"identifier": "A", "content": "Wemer's theory"}, {"identifier": "B", "content": "Valence bond theory"}, {"identifier": "C", "content": "Crystal field theory"}, {"identifier": "D", "content": "Molecular orbital theory"}] | ["D"] | null | In complex [Ni(CO)<sub>4</sub>] decrease in Ni–C bond
length and increase in C–O bond length as well
as it's magnetic property is explained by MOT. | mcq | jee-main-2020-online-7th-january-morning-slot | 1,567 |
HA7y49WAB7Vbk6mGDUjgy2xukf2bpba1 | chemistry | coordination-compounds | crystal-field-theory-(cft) | The electronic spectrum of [Ti(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup> shows a single broad peak with a maximum at 20,300 cm<sup>-1</sup>
.
The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol<sup>-1</sup>, is : | [{"identifier": "A", "content": "83.7"}, {"identifier": "B", "content": "242.5"}, {"identifier": "C", "content": "145.5"}, {"identifier": "D", "content": "97"}] | ["D"] | null | [Ti(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup>
<br><br>Ti = [Ar]3d<sup>2</sup>4s<sup>2</sup>
<br><br>Ti<sup>+3</sup> = [Ar]3d<sup>1</sup>
<br><picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734263273/exam_images/gkqnwsbbrzqmb3wx2wjq.webp"><source media="(max-width:... | mcq | jee-main-2020-online-3rd-september-morning-slot | 1,568 |
KLqteFY6332f5wfXVl1klrucjz7 | chemistry | coordination-compounds | crystal-field-theory-(cft) | The calculated magnetic moments (spin only value) for species $${[FeC{l_4}]^{2 - }}$$, $${[Co{({C_2}{O_4})_3}]^{3 - }}$$ and $$MnO_4^{2 - }$$ respectively are : | [{"identifier": "A", "content": "5.92, 4.90 and 0 BM"}, {"identifier": "B", "content": "4.90, 0 and 1.73 BM"}, {"identifier": "C", "content": "5.82, 0 and 0 BM"}, {"identifier": "D", "content": "4.90, 0 and 2.83 BM"}] | ["B"] | null | (i) $${[FeC{l_4}]^{2 - }}\buildrel {} \over
\longrightarrow F{e^{2 + }}\buildrel {} \over
\longrightarrow [Ar]3{d^6}$$<br><br>$$\therefore$$ Cl is weak field ligand so does not pairing occur<br><br><img src="https://app-content.cdn.examgoal.net/fly/@width/image/1kxljxyyi/8384f319-eb1f-4485-9fff-1fc7403f5bd3/6b9e79a0-... | mcq | jee-main-2021-online-24th-february-evening-slot | 1,569 |
IRQVZzjNRtU1S7Er6D1kmiurrct | chemistry | coordination-compounds | crystal-field-theory-(cft) | [Ti(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup> absorbs light of wavelength 498 nm during a d $$-$$ d transition. The octahedral splitting energy for the above complex is ____________ $$\times$$ 10<sup>$$-$$19</sup> J. (Round off to the Nearest Integer). h = 6.626 $$\times$$ 10<sup>$$-$$34</sup> Js; c = 3 $$\times$$ 10<s... | [] | null | 4 | Octahedral splitting energy = $${{hc} \over \lambda }$$<br><br>$$ = {{6.626 \times {{10}^{ - 34}} \times 3 \times {{10}^8}} \over {498 \times {{10}^{ - 9}}}}$$<br><br>$$ = 3.99 \times {10^{ - 19}}J$$<br><br>$$ \approx 4 \times {10^{ - 19}}$$ | integer | jee-main-2021-online-16th-march-evening-shift | 1,570 |
1krq5awhz | chemistry | coordination-compounds | crystal-field-theory-(cft) | The correct order of intensity of colors of the compounds is : | [{"identifier": "A", "content": "$${[Ni{(CN)_4}]^{2 - }} > {[NiC{l_4}]^{2 - }} > {[Ni{({H_2}O)_6}]^{2 + }}$$"}, {"identifier": "B", "content": "$${[Ni{({H_2}O)_6}]^{2 + }} > {[NiC{l_4}]^{2 - }} > {[Ni{(CN)_4}]^{2 - }}$$"}, {"identifier": "C", "content": "$${[NiC{l_4}]^{2 - }} > {[Ni{({H_2}O)_6}]^{2 + }} ... | ["C"] | null | Correct order of intensity of colours of the compounds is<br/><br/>[NiCl<sub>4</sub>]<sup>2$$-$$</sup> > [Ni(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> > [Ni(CN)<sub>4</sub>]<sup>2$$-$$</sup><br/><br/>Ni is in +2 oxidation state in all complexes. The intensity of colour depends on the strength of the ligand attached wit... | mcq | jee-main-2021-online-20th-july-morning-shift | 1,571 |
1krt6bv7o | chemistry | coordination-compounds | crystal-field-theory-(cft) | The total number of unpaired electrons present in [Co(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>2</sub> and [Co(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>3</sub> is : | [] | null | 3 | [Co(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>2</sub><br><br>Co<sup>2+</sup> : [Ar]3d<sup>7</sup>4s<sup>0</sup>4p<sup>0</sup><br><br>For this complex $$\Delta$$<sub>0</sub> < P.E., so pairing of electron does not take place.<br><br>sp<sup>3</sup>d<sup>2</sup> hybridisation<br><br>Total 3 unpaired electrons are present.<br>... | integer | jee-main-2021-online-22th-july-evening-shift | 1,572 |
1ktcr70r7 | chemistry | coordination-compounds | crystal-field-theory-(cft) | Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.<br/><br/>Complexes : $$\mathop {{{[Co{F_6}]}^{3 - }}}\limits_A ,\mathop {{{[Co{{({H_2}O)}_6}]}^{2 + }}}\limits_B ,\mathop {{{[Co{{(N{H_3})}_6}]}^{3 + }}}\limits_C and \mathop {{{[Co{{({en})}_3}]}^{3 + }}}\... | [{"identifier": "A", "content": "A < B < C < D"}, {"identifier": "B", "content": "B < A < C < D"}, {"identifier": "C", "content": "B < C < D < A"}, {"identifier": "D", "content": "C < D < B < A"}] | ["B"] | null | (i) CFSE $$\propto$$ charge or oxidation no. of central metal ion.<br><br>(ii) CFSE $$\propto$$ strength of ligand<br><br>en > NH<sub>3</sub> > H<sub>2</sub>O > F<sup>$$-$$</sup><br><br>$$\therefore$$ order of CFSE<br><br>$$\mathop {{{[Co{{(en)}_3}]}^{ + 3}}}\limits^{III} > \mathop {{{[Co{{(N{H_3})}_6}]}^{... | mcq | jee-main-2021-online-26th-august-evening-shift | 1,573 |
1ktn0jsc8 | chemistry | coordination-compounds | crystal-field-theory-(cft) | The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (M<sup>z+</sup>) are $$-$$0.8 $$\Delta$$<sub>0</sub> and 3.87 BM, respectively. Identify (M<sup>z+</sup>) : | [{"identifier": "A", "content": "V<sup>3+</sup>"}, {"identifier": "B", "content": "Cr<sup>3+</sup>"}, {"identifier": "C", "content": "Mn<sup>4+</sup>"}, {"identifier": "D", "content": "Co<sup>2+</sup>"}] | ["D"] | null | Co<sup>2+</sup> = [Ar] 3d<sup>7</sup>4s<sup>o</sup>
<br><br>in [Co(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup>, H<sub>2</sub>O will behave as weak field
ligand
<br><br>Co<sup>2+</sup> = t<sub>2g</sub><sup>5</sup>
, e<sub>g</sub><sup>2</sup>
<br><br><img src="https://app-content.cdn.examgoal.net/fly/@width/image/1kx877ifm... | mcq | jee-main-2021-online-1st-september-evening-shift | 1,574 |
1l57s48u6 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Which of the following will have maximum stabilization due to crystal field?</p> | [{"identifier": "A", "content": "[Ti(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup>"}, {"identifier": "B", "content": "[Co(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup>"}, {"identifier": "C", "content": "[Co(CN)<sub>6</sub>]<sup>3$$-$$</sup>"}, {"identifier": "D", "content": "[Cu(NH<sub>3</sub>)<sub>4</sub>]<sup>2+</sup>"}] | ["C"] | null | The given complexes are:
<br/><br/>
$\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+},\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{-3},\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$
<br/><br/>
$\mathrm{CN}^{-}$i... | mcq | jee-main-2022-online-27th-june-morning-shift | 1,575 |
1l58ki3ae | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Reaction of [Co(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in t<sub>2g</sub>-orbitals of the product is ___________.</p> | [] | null | 6 | $\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2} \underset{\mathrm{O}_{2}}{\stackrel{\mathrm{NH}_{3}}{\longrightarrow}}\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{+3}+e^{-}$
<br/><br/>
$$
\mathrm{Co}^{+3} \longrightarrow 3 \mathrm{~d}^{6}
$$
<br/><br/>
$\mathrm{NH}_{3}$ is a strong... | integer | jee-main-2022-online-26th-june-evening-shift | 1,577 |
1l5amuxnz | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>If [Cu(H<sub>2</sub>O)<sub>4</sub>]<sup>2+</sup> absorbs a light of wavelength 600 nm for d-d transition, then the value of octahedral crystal field splitting energy for [Cu(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> will be ____________ $$\times$$ 10<sup>$$-$$21</sup> J. [Nearest Integer]</p>
<p>(Given : h = 6.63 $$... | [] | null | 766 | $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\right]^{2+}$ is tetrahedral
<br/><br/>
$\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ is octahedral
<br/><br/>
$$
\because \Delta_{\mathrm{t}}=\frac{4}{9} \times \Delta_{0}
$$
<br/><br/>
$$
\begin{aligned}
&\Delta_{\mathrm{t}}=\frac... | integer | jee-main-2022-online-25th-june-morning-shift | 1,578 |
1l5bdbow9 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Transition metal complex with highest value of crystal field splitting ($$\Delta$$<sub>0</sub>) will be :</p> | [{"identifier": "A", "content": "[Cr(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup>"}, {"identifier": "B", "content": "[Mo(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup>"}, {"identifier": "C", "content": "[Fe(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup>"}, {"identifier": "D", "content": "[Os(H<sub>2</sub>O)<sub>6</sub>]<sup>3+</sup... | ["D"] | null | Crystal field splitting $$\left(\Delta_{0}\right)$$ for octahedral complexes depends on oxidation state of the metal as well as to which transition series the metal belongs. For the same oxidation state, the crystal field splitting $$\left(\Delta_{0}\right)$$ increases as we move from $$3 d \rightarrow 4 d \rightarrow ... | mcq | jee-main-2022-online-24th-june-evening-shift | 1,579 |
1l6e2codc | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Consider the following metal complexes :</p>
<p>$$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$$</p>
<p>$$\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}$$</p>
<p>$$\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}$$</p>
<p>$$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathr... | [] | null | 0 | In all complexes, Co is present in $+3$ oxidation state and all complexes are low spin or inner orbital complex.
<br><br>
The stronger the ligand, the higher the crystal field splitting.
<br><br>
So, the order of crystal field splitting is
<br><br>
$\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}>\left[\mathrm{Co}\le... | integer | jee-main-2022-online-25th-july-morning-shift | 1,580 |
1l6f6yqm1 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>The correct order of energy of absorption for the following metal complexes is :</p>
<p>A : [Ni(en)<sub>3</sub>]<sup>2+</sup> , B : [Ni(NH<sub>3</sub>)<sub>6</sub>]<sup>2+</sup> , C : [Ni(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup></p> | [{"identifier": "A", "content": "C < B < A"}, {"identifier": "B", "content": "B < C < A"}, {"identifier": "C", "content": "C < A < B"}, {"identifier": "D", "content": "A < C < B"}] | ["A"] | null | Stronger is ligand attached to metal ion, greater will be the splitting between $$\mathrm{t}_{2} \mathrm{g}$$ and $e_g$ (hence greater will be $$\Delta \mathrm{U})$$<br/><br/>$$ \therefore$$ Greater will be absorption of energy.<br/><br/> Hence correct order
<br/><br/>
$$\left[\mathrm{Ni}(\mathrm{en})_{3}\right]^{2+}>\... | mcq | jee-main-2022-online-25th-july-evening-shift | 1,581 |
1l6p97bwc | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>$$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is $$(-)$$ ____________ $$\Delta_{0}$$. (Nearest integer)</p> | [] | null | 2 | In $\left[\mathrm{Fe}(\mathrm{CN})^{6}\right]^{3-}$, $\mathrm{Fe}$ is present in (+3) oxidation state $\mathrm{Fe}(\mathrm{III}) \Rightarrow$ inner orbital complex $\Rightarrow d^{5}$ (with pairing)
<br/><br/>
Configuration $\Rightarrow t_{2 g}^{5}$
<br/><br/>
CFSE $=5 \times \frac{-2}{5} \Delta_{0}=-2 \Delta_{0}$ | integer | jee-main-2022-online-29th-july-morning-shift | 1,582 |
1ldohre4r | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Which of the following complex will show largest splitting of d-orbitals?</p> | [{"identifier": "A", "content": "$$[\\mathrm{Fe(C_2O_4)_3]^{3-}}$$"}, {"identifier": "B", "content": "$$[\\mathrm{Fe(CN)_6]^{3-}}$$"}, {"identifier": "C", "content": "$$[\\mathrm{Fe(NH_3)_6]^{3+}}$$"}, {"identifier": "D", "content": "$$[\\mathrm{FeF_6]^{3-}}$$"}] | ["B"] | null | CN<sup>–</sup>
is strongest field ligand among given ligands. So maximum splitting
in d-orbitals take place. | mcq | jee-main-2023-online-1st-february-morning-shift | 1,585 |
1ldr3nt6h | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Which of the following is correct order of ligand field strength?</p> | [{"identifier": "A", "content": "$$\\mathrm{S}^{2-}<\\mathrm{C}_{2} \\mathrm{O}_{4}^{2-}<\\mathrm{NH}_{3} < $$ en $$<\\mathrm{CO}$$"}, {"identifier": "B", "content": "$$\\mathrm{CO}<\\mathrm{en}<\\mathrm{NH}_{3}<\\mathrm{C}_{2} \\mathrm{O}_{4}^{2}<\\mathrm{S}^{2-}$$"}, {"identifier": "C", "content": "$$\\mathrm{S}^{2-}... | ["A"] | null | <p>Ligand field strength</p>
<p>$$\mathrm{{S^{2 - }} < {C_2}O_4^{2 - } < N{H_3} < en < CO}$$</p> | mcq | jee-main-2023-online-30th-january-morning-shift | 1,586 |
1ldu138c7 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Match List I with List II</p>
<p><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-IV, B-I, C-III, D-II"}, {"identifier": "B", "content": "A-III, B-II, C-I, D-IV"}, {"identifier": "C", "content": "A-III, B-I, C-II, D-IV"}, {"identifier": "D", "content": "A-II, B-III, C-IV, D-I"}] | ["B"] | null | <p>Co-ordination compounds absorb a particular wavelength following certain rules.</p>
<p> $$
\begin{aligned}
\text{Wavelength of light absorbed} & \propto \frac{1}{\text { Oxidation state of metal ion }} \\\\
& \propto \frac{1}{\text { Strength of ligand }}
\end{aligned}
$$</p>
<p>Ligand field strength : $\mathrm{CN}... | mcq | jee-main-2023-online-25th-january-evening-shift | 1,588 |
1ldwv1u69 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Which of the following cannot be explained by crystal field theory?</p> | [{"identifier": "A", "content": "The order of spectrochemical series"}, {"identifier": "B", "content": "Stability of metal complexes"}, {"identifier": "C", "content": "Magnetic properties of transition metal complexes"}, {"identifier": "D", "content": "Colour of metal complexes"}] | ["A"] | null | CFT does not explain the order of spectrochemical
series because as per CFT, anionic ligands should
exert greatest splitting effect. However, they lie on
lower end of the spectrochemical series. | mcq | jee-main-2023-online-24th-january-evening-shift | 1,589 |
lgnzajcc | chemistry | coordination-compounds | crystal-field-theory-(cft) | The complex with highest magnitude of crystal field splitting energy $\left(\Delta_{0}\right)$ is : | [{"identifier": "A", "content": "$\\left[\\mathrm{Fe}\\left(\\mathrm{OH}_{2}\\right)_{6}\\right]^{3+}$"}, {"identifier": "B", "content": "$\\left[\\mathrm{Mn}\\left(\\mathrm{OH}_{2}\\right)_{6}\\right]^{3+}$"}, {"identifier": "C", "content": "$\\left[\\mathrm{Cr}\\left(\\mathrm{OH}_{2}\\right)_{6}\\right]^{3+}$"}, {"id... | ["C"] | null | The crystal field splitting energy ($\Delta_0$) is proportional to the electrostatic interaction between the metal ion and the ligands. This interaction is affected by the size of the metal ion, as well as the size of the ligands.
<br/><br/>
The size of the metal ion can be estimated by its ionic radius, which is the d... | mcq | jee-main-2023-online-15th-april-morning-shift | 1,591 |
lgo0i5wf | chemistry | coordination-compounds | crystal-field-theory-(cft) | The homoleptic and octahedral complex of $\mathrm{Co}^{2+}$ and $\mathrm{H}_{2} \mathrm{O}$ has ___________ unpaired electron(s) in the $t_{2\mathrm{g}}$ set of orbitals. | [] | null | 1 | When the water ligands coordinate to the $\mathrm{Co}^{2+}$ ion in $\mathrm{[Co(H_2O)6]^{2+}}$, the $d$ orbitals of the $\mathrm{Co}^{2+}$ ion split into two sets of orbitals: the $t{2g}$ set, which consists of the $d_{xy}$, $d_{xz}$, and $d_{yz}$ orbitals, and the $e_g$ set, which consists of the $d_{z^2}$ and $d_{x^2... | integer | jee-main-2023-online-15th-april-morning-shift | 1,592 |
1lgrk665p | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Match List I with List II</p>
<p><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-I, B-IV, C-II, D-III"}, {"identifier": "B", "content": "A-III, B-IV, C-I, D-II"}, {"identifier": "C", "content": "A-II, B-III, C-I, D-IV"}, {"identifier": "D", "content": "A-I, B-II, C-IV, D-III"}] | ["A"] | null | <p>In order to match these complexes with their respective crystal field splitting energies (CFSE), we need to understand the coordination number, the geometry of the complex, and the nature of the ligand. </p>
<p>The crystal field splitting energy, often denoted as Δ₀ or Δ, is the energy difference between the higher-... | mcq | jee-main-2023-online-12th-april-morning-shift | 1,593 |
1lgv0u3dz | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>The ratio of spin-only magnetic moment values $$\mu_{\text {eff }}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{3-} / \mu_{\text {eff }}\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$$ is _________.</p> | [] | null | 1 | In both given complexes, namely, $$[\mathrm{Cr}(\mathrm{CN})_{6}]^{3-}$$ and $$[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}]^{3+}$$, the chromium atom is in the +3 oxidation state. This results in a $$d^3$$ configuration for the chromium ion.
<br/><br/>Despite the difference in ligands (CN<sup>-</sup> and H<... | integer | jee-main-2023-online-11th-april-morning-shift | 1,594 |
1lgvu5u41 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>The correct order of the number of unpaired electrons in the given complexes is</p>
<p>A. $$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$$</p>
<p>B. $$\left[\mathrm{Fe} \mathrm{F}_{6}\right]^{3-}$$</p>
<p>C. $$\left[\mathrm{CoF}_{6}\right]^{3-}$$</p>
<p>D. $$\left.[\mathrm{Cr} \text { (oxalate})_{3}\right]^{3-}$$<... | [{"identifier": "A", "content": "E < A < B < D < C"}, {"identifier": "B", "content": "A < E < D < C < B"}, {"identifier": "C", "content": "A < E < C < B < D"}, {"identifier": "D", "content": "E < A < D < C < B"}] | ["D"] | null | <p>The number of unpaired electrons in a complex can be determined by the oxidation state of the central metal atom and the ligand field splitting energy. In general, a complex with a high-spin configuration will have more unpaired electrons than a complex with a low-spin configuration.</p>
<p>In the given complexes, t... | mcq | jee-main-2023-online-10th-april-evening-shift | 1,595 |
1lgvuvhk7 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Match List I with List II</p>
<p><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-IV, B-I, C-II, D-III"}, {"identifier": "B", "content": "A-II, B-IV, C-III, D-I"}, {"identifier": "C", "content": "A-II, B-IV, C-I, D-III"}, {"identifier": "D", "content": "A-IV, B-I, C-III, D-II"}] | ["A"] | null | $$
\begin{aligned}
& \text{(A)} ~~ {\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}} \\\\
& \mathrm{Ti}^{2+} \Rightarrow 3 \mathrm{~d}^2 4 \mathrm{~s}^0 \\\\
& \mathrm{t}_{2 \mathrm{~g}} \mathrm{e}^{-}=2 \\\\
& \mathrm{e}_{\mathrm{g}} \mathrm{e}^{-}=0 \\\\
& \mathrm{CFSE}=[-0.4 \times 2+0.6 \times ... | mcq | jee-main-2023-online-10th-april-evening-shift | 1,596 |
1lgvv6pbu | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>For a metal ion, the calculated magnetic moment is $$4.90 ~\mathrm{BM}$$. This metal ion has ___________ number of unpaired electrons.</p> | [] | null | 4 | <p>Using the equation $\mu = \sqrt{n(n+2)}$, where $\mu$ is the magnetic moment and $n$ is the number of unpaired electrons, we can substitute $\mu = 4.90$:</p>
<p>$4.90 = \sqrt{n(n+2)}$</p>
<p>Squaring both sides of the equation:</p>
<p>$(4.90)^2 = n(n+2)$</p>
<p>$24 = n^2 + 2n$</p>
<p>Rearranging the equation:</p>
<p... | integer | jee-main-2023-online-10th-april-evening-shift | 1,597 |
1lgygiaty | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>The octahedral diamagnetic low spin complex among the following is :</p> | [{"identifier": "A", "content": "[Co(NH$$_3$$)$$_6$$]$$^{3+}$$"}, {"identifier": "B", "content": "[NiCl$$_4$$]$$^{2-}$$"}, {"identifier": "C", "content": "[CoCl$$_6$$]$$^{3-}$$"}, {"identifier": "D", "content": "[CoF$$_6$$]$$^{3-}$$"}] | ["A"] | null | <p>In the complex [Co(NH$_3$)$_6$]$^{3+}$, Co is in the +3 oxidation state. This means it has a configuration of $d^6$. NH$_3$ is a strong field ligand, which causes the d-electrons to pair up. Therefore, this complex is a low-spin (also referred to as spin-paired) complex. </p>
<p>The term "low-spin" means t... | mcq | jee-main-2023-online-10th-april-morning-shift | 1,598 |
1lgyhhdmz | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>In potassium ferrocyanide, there are ________ pairs of electrons in the $$t_{2g}$$ set of orbitals.</p> | [] | null | 3 | $\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$<br><br>
<img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lixrwnzt/ef7235fb-626a-4ff1-bdbd-3c11b01bbea9/831f8f80-0bd4-11ee-b042-41549097b660/file-6y3zli1lixrwnzu.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/6y3zli1lixrw... | integer | jee-main-2023-online-10th-april-morning-shift | 1,599 |
1lgyrpygh | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Match List I with List II</p>
<p><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-IV, B-III, C-II, D-I"}, {"identifier": "B", "content": "A-II, B-I, C-IV, D-III"}, {"identifier": "C", "content": "A-II, B-IV, C-I, D-III"}, {"identifier": "D", "content": "A-III, B-IV, C-I, D-II"}] | ["C"] | null | For option (A)<br/><br/>
$$
\begin{aligned}
& \mathrm{Cr}^{+3}: 3 \mathrm{~d}^3 \\\\
& \mathrm{CN}^{-} \rightarrow \mathrm{SFL}
\end{aligned}
$$<br/><br/>
No. of unpaired electrons $=3$<br/><br/>
For option (B)<br/><br/>
$$
\begin{aligned}
& \mathrm{Fe}^{+2}: 3 \mathrm{~d}^6 \\\\
& \mathrm{H}_2 \mathrm{O}: \mathrm{WFL}... | mcq | jee-main-2023-online-8th-april-evening-shift | 1,600 |
1lgysn4dn | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>The observed magnetic moment of the complex $$\left.\left[\operatorname{Mn}(\underline{N} C S)_{6}\right)\right]^{x^{-}}$$ is $$6.06 ~\mathrm{BM}$$. The numerical value of $$x$$ is __________.</p> | [] | null | 4 | <p>The complex is given as $[\mathrm{Mn}(\mathrm{NCS})_{6}]^{x-}$. Here, $\mathrm{NCS}^{-}$ acts as a ligand. Each $\mathrm{NCS}^{-}$ has a charge of -1 and since there are six of them, they contribute a total charge of -6 to the complex.</p>
<p>Manganese (Mn) in this complex is in the +2 oxidation state. We know this ... | integer | jee-main-2023-online-8th-april-evening-shift | 1,601 |
1lh02sqpy | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Which of the following complex is octahedral, diamagnetic and the most stable?</p> | [{"identifier": "A", "content": "$$\\mathrm{Na}_{3}\\left[\\mathrm{CoCl}_{6}\\right]$$"}, {"identifier": "B", "content": "$$\\left[\\mathrm{Co}\\left(\\mathrm{H}_{2} \\mathrm{O}\\right)_{6}\\right] \\mathrm{Cl}_{2}$$"}, {"identifier": "C", "content": "$$\\mathrm{K}_{3}\\left[\\mathrm{Co}(\\mathrm{CN})_{6}\\right]$$"}, ... | ["C"] | null | <p>Option A :
$$\mathrm{Na}_{3}\left[\mathrm{CoCl}_{6}\right]$$ </p>
<p>This is an octahedral complex, but it is not diamagnetic. Co in this complex is in +3 oxidation state, and the d-electron configuration is $t_{2g}^6 e_{g}^0$, leading to two unpaired electrons.</p>
<p>Option B :
$$\left[\mathrm{Co}\left(\mathrm{H... | mcq | jee-main-2023-online-8th-april-morning-shift | 1,602 |
1lh030hwr | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>The correct order of spin only magnetic moments for the following complex ions is</p> | [{"identifier": "A", "content": "$$\\left[\\mathrm{Fe}(\\mathrm{CN})_{6}\\right]^{3-}<\\left[\\mathrm{CoF}_{6}\\right]^{3-}<\\left[\\mathrm{MnBr}_{4}\\right]^{2-}<\\left[\\mathrm{Mn}(\\mathrm{CN})_{6}\\right]^{3-}$$"}, {"identifier": "B", "content": "$$\\left[\\mathrm{MnBr}_{4}\\right]^{2-}<\\left[\\mathrm{CoF}_{6}\\ri... | ["C"] | null | <p>The spin-only magnetic moment of a complex ion is calculated using the formula $\mu = \sqrt{n(n+2)}$, where $n$ is the number of unpaired electrons in the complex ion. In the case of transition metal complexes, the number of unpaired electrons and hence the magnetic moment can be influenced by the field strength of ... | mcq | jee-main-2023-online-8th-april-morning-shift | 1,603 |
1lh27ear9 | chemistry | coordination-compounds | crystal-field-theory-(cft) | <p>Given below are two statements, one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$.</p>
<p>Assertion A: The spin only magnetic moment value for $$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$$ is $$1.74 \mathrm{BM}$$, whereas for $$\left[\mathrm{Fe}\left(\mathrm{H}_{2} \... | [{"identifier": "A", "content": "Both A and R are true and R is the correct explanation of A"}, {"identifier": "B", "content": "A is true but R is false"}, {"identifier": "C", "content": "A is false but R is true"}, {"identifier": "D", "content": "Both A and R are true but R is NOT the correct explanation of A"}] | ["D"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1llm8rj7c/a9a7510c-15f6-46a4-bc58-652933d8e6f5/adea8070-40e1-11ee-8358-1796f8234e47/file-6y3zli1llm8rj7d.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/6y3zli1llm8rj7c/a9a7510c-15f6-46a4-bc58-652933d8e6f5/adea8070-40e1-11ee-83... | mcq | jee-main-2023-online-6th-april-morning-shift | 1,604 |
lsaobjj7 | chemistry | coordination-compounds | crystal-field-theory-(cft) | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ and $\left[\mathrm{CoF}_6\right]^{3-}$ are respectively known as : | [{"identifier": "A", "content": "Inner orbital Complex, Spin paired Complex"}, {"identifier": "B", "content": "Spin paired Complex, Spin free Complex"}, {"identifier": "C", "content": "Spin free Complex, Spin paired Complex"}, {"identifier": "D", "content": "Outer orbital Complex, Inner orbital Complex"}] | ["B"] | null | $$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}
$$
<br/><br/>$\mathrm{Co}^{3+}($ strong field ligand $) \Rightarrow 3 \mathrm{~d}^6\left(\mathrm{t}_{2 \mathrm{~g}}^6, \mathrm{e}_{\mathrm{g}}^0\right)$,
<br/><br/>Hybridisation : $\mathrm{d}^2 \mathrm{sp}^3$
<br/><br/>Inner obital complex(spin paired complex... | mcq | jee-main-2024-online-1st-february-evening-shift | 1,605 |
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