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|---|---|---|---|---|---|---|---|---|---|---|---|
GTMP3L6qKSkLalXPVK1klrgga4d | chemistry | periodic-table-and-periodicity | nature-of-oxide | Number of amphoteric compounds among the following is ________.<br/>
(A) BeO<br/>
(B) BaO<br/>
(C) Be(OH)<sub>2</sub><br/>
(D) Sr(OH)<sub>2</sub> | [] | null | 2 |
An amphoteric compound is a molecule or ion that can react with both as an acid or as a base.<br/><br/>BeO = Amphoteric<br/><br/>BaO = Basic<br/><br/>Be(OH)<sub>2</sub> = Amphoteric<br/><br/>Sr(OH)<sub>2</sub> = Basic<br/><br/>Both beryllium compound BeO and Be(OH)<sub>2</sub> are amphoteric in nature while compound B... | integer | jee-main-2021-online-24th-february-morning-slot | 3,096 |
qzdhwGRhNUgj6Phwnq1kluryl24 | chemistry | periodic-table-and-periodicity | nature-of-oxide | Which pair of oxides is acidic in nature? | [{"identifier": "A", "content": "CaO, SiO<sub>2</sub>"}, {"identifier": "B", "content": "B<sub>2</sub>O<sub>3</sub>, CaO"}, {"identifier": "C", "content": "B<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>"}, {"identifier": "D", "content": "N<sub>2</sub>O, BaO"}] | ["C"] | null | B<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> both are oxides of non-metal and hence are acidic in nature. | mcq | jee-main-2021-online-26th-february-evening-slot | 3,097 |
1krz1ky52 | chemistry | periodic-table-and-periodicity | nature-of-oxide | Match List - I with List - II :<br/><br/><table>
<thead>
<tr>
<th></th>
<th>List - I</th>
<th></th>
<th>List - II</th>
</tr>
</thead>
<tbody>
<tr>
<td>(a)</td>
<td>NaOH</td>
<td>(i)</td>
<td>Acidic</td>
</tr>
<tr>
<td>(b)</td>
<td>$$Be{(OH)_2}$$</td>
<td>(ii)</td>
<td>Basic</td>
</tr>
<tr>
<td>(c)</td>
<td>$$Ca{(OH)_2}... | [{"identifier": "A", "content": "(a)-(ii), (b)-(ii), (c)-(iii), (d)-(ii), (e)-(iii)"}, {"identifier": "B", "content": "(a)-(ii), (b)-(iii), (c)-(ii), (d)-(i), (e)-(iii)"}, {"identifier": "C", "content": "(a)-(ii), (b)-(ii), (c)-(iii), (d)-(i), (e)-(iii)"}, {"identifier": "D", "content": "(a)-(ii), (b)-(i), (c)-(ii), (d... | ["B"] | null | NaOH $$\to$$ Basic<br><br>Be(OH)<sub>2</sub> $$\to$$ Amphoteric<br><br>Ca(OH)<sub>2</sub> $$\to$$ Basic<br><br>B(OH)<sub>3</sub> $$\to$$ Acidic<br><br>Al(OH)<sub>3</sub> $$\to$$ Amphoteric | mcq | jee-main-2021-online-27th-july-morning-shift | 3,098 |
1l55n6t8x | chemistry | periodic-table-and-periodicity | nature-of-oxide | <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:so... | [{"identifier": "A", "content": "(A) - (IV), (B) - (III), (C) - (I), (D) - (II)"}, {"identifier": "B", "content": "(A) - (IV), (B) - (II), (C) - (I), (D) - (III)"}, {"identifier": "C", "content": "(A) - (II), (B) - (IV), (C) - (III), (D) - (I)"}, {"identifier": "D", "content": "(A) - (I), (B) - (II), (C) - (III), (D) -... | ["B"] | null | (A) Cl<sub>2</sub>O<sub>7</sub> → Acidic<br/><br/>
(B) Na<sub>2</sub>O → Basic<br/><br/>
(C) Al<sub>2</sub>O<sub>3</sub> → Amphoteric<br/><br/>
(D) N<sub>2</sub>O → Neutral<br/><br/>
Oxides of metals are basic in nature whereas oxides of non-metals are acidic in nature. N<sub>2</sub>O is a neutral oxide. | mcq | jee-main-2022-online-28th-june-evening-shift | 3,099 |
1l5c6d6n1 | chemistry | periodic-table-and-periodicity | nature-of-oxide | <p>Given below are the oxides:</p>
<p>Na<sub>2</sub>O, As<sub>2</sub>O<sub>3</sub>, N<sub>2</sub>O, NO and Cl<sub>2</sub>O<sub>7</sub></p>
<p>Number of amphoteric oxides is :</p> | [{"identifier": "A", "content": "0"}, {"identifier": "B", "content": "1"}, {"identifier": "C", "content": "2"}, {"identifier": "D", "content": "3"}] | ["B"] | null | Oxides<br/><br/>$\mathrm{Na}_2 \mathrm{O} \longrightarrow$ Basic<br/><br/>
$\mathrm{As}_2 \mathrm{O}_3 \longrightarrow$ Amphoteric<br/><br/>
$\mathrm{N}_2 \mathrm{O} \longrightarrow$ Neutral<br/><br/>
$\mathrm{NO} \longrightarrow$ Neutral<br/><br/>
$\mathrm{Cl}_2 \mathrm{O}_7 \longrightarrow$ Acidic<br/><br/>
Hence, on... | mcq | jee-main-2022-online-24th-june-morning-shift | 3,101 |
1lgq3y68n | chemistry | periodic-table-and-periodicity | nature-of-oxide | <p>Which of the following statements are not correct?</p>
<p>A. The electron gain enthalpy of $$\mathrm{F}$$ is more negative than that of $$\mathrm{Cl}$$.</p>
<p>B. Ionization enthalpy decreases in a group of periodic table.</p>
<p>C. The electronegativity of an atom depends upon the atoms bonded to it.</p>
<p>D. $$\m... | [{"identifier": "A", "content": "A, B, C and D"}, {"identifier": "B", "content": "A, C and D Only"}, {"identifier": "C", "content": "A, B and D Only"}, {"identifier": "D", "content": "B and D Only"}] | ["B"] | null | Let's analyze the statements:
<br/><br/>
A. The electron gain enthalpy of $\mathrm{F}$ is more negative than that of $\mathrm{Cl}$.<br/><br/>
This statement is incorrect. The electron gain enthalpy of $\mathrm{F}$ is less negative than that of $\mathrm{Cl}$ due to its small size, which leads to increased electron-elect... | mcq | jee-main-2023-online-13th-april-morning-shift | 3,103 |
1lh3266hc | chemistry | periodic-table-and-periodicity | nature-of-oxide | <p>Group-13 elements react with $$\mathrm{O}_{2}$$ in amorphous form to form oxides of type $$\mathrm{M}_{2} \mathrm{O}_{3}~(\mathrm{M}=$$ element). Which among the following is the most basic oxide?</p> | [{"identifier": "A", "content": "Al$$_2$$O$$_3$$"}, {"identifier": "B", "content": "TI$$_2$$O$$_3$$"}, {"identifier": "C", "content": "B$$_2$$O$$_3$$"}, {"identifier": "D", "content": "Ga$$_2$$O$$_3$$"}] | ["B"] | null | As electropositive character increases basic character of oxide increases.<br/><br/>
$$
\underbrace{\mathrm{B}_2 \mathrm{O}_3}_{\text {acidic }}<\underbrace{\mathrm{Al}_2 \mathrm{O}_3<\mathrm{Ga}_2 \mathrm{O}_3}_{\text {amphoteric }}<\underbrace{\mathrm{In}_2 \mathrm{O}_3<\mathrm{Tl}_2 \mathrm{O}_3}_{\text {basic }}
$$ | mcq | jee-main-2023-online-6th-april-evening-shift | 3,104 |
1lsg836jo | chemistry | periodic-table-and-periodicity | nature-of-oxide | <p>Given below are two statements:</p>
<p>Statement - I: Along the period, the chemical reactivity of the elements gradually increases from group 1 to group 18 .</p>
<p>Statement - II: The nature of oxides formed by group 1 elements is basic while that of group 17 elements is acidic.</p>
<p>In the light of the above st... | [{"identifier": "A", "content": "Statement I is False but Statement II is true\n"}, {"identifier": "B", "content": "Both Statement I and Statement II are False\n"}, {"identifier": "C", "content": "Statement I is True But Statement II is False\n"}, {"identifier": "D", "content": "Both Statement I and Statement II are Tr... | ["A"] | null | <p>Chemical reactivity of elements decreases along the period therefore statement - I is false.</p>
<p>Group - 1 elements from basic nature oxides while group - 17 elements form acidic oxides therefore statement - II is true.</p> | mcq | jee-main-2024-online-30th-january-evening-shift | 3,105 |
Oq7FrqXUGCyfiyFr | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the
halogens are given. Which of these statements gives the correct picture? | [{"identifier": "A", "content": "The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic\nnumber down the group "}, {"identifier": "B", "content": "In both the alkali metals and the halogens the chemical reactivity decreases with increase in\natomic number down the group"}, {... | ["D"] | null | For alkali metals on going down the group, number of electron shells increase, so forces between the oppositely charged electron and nucleus is less so electron can be removed easily, therefore, reactivity increases. But for halogens they react by abstracting electron from less electronegative atoms and the attraction ... | mcq | aieee-2006 | 3,107 |
1lgrI6PKBEmtwbZP | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Outer electronic configuration of Gd (Atomic no : 64) is - | [{"identifier": "A", "content": "4f<sup>8</sup>5d<sup>0</sup>6s<sup>2</sup>"}, {"identifier": "B", "content": "4f<sup>4</sup>5d<sup>4</sup>6s<sup>2</sup>"}, {"identifier": "C", "content": "4f<sup>7</sup>5d<sup>1</sup>6s<sup>2</sup>"}, {"identifier": "D", "content": "4f<sup>3</sup>5d<sup>5</sup>6s<sup>2</sup>"}] | ["C"] | null | Electronic configuration of Gd(64) : [Xe]4f<sup>7</sup>5s<sup>2</sup>5p<sup>6</sup>5d<sup>1</sup>6s<sup>2</sup>
<br><br>So the outer electronic configuration will be : 4f<sup>7</sup>5d<sup>1</sup>6s<sup>2</sup>
<br><br><b>Shortcut Method :</b> Gd belongs to 4f series which is also called lanthanide series. In this lant... | mcq | aieee-2011 | 3,108 |
e7847wQT5m3tOcaK9JXhZ | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | The following statements concern elements in the periodic table. Which of the following is true ? | [{"identifier": "A", "content": "All the elements in Group 17 are gases."}, {"identifier": "B", "content": "The Group 13 elements are all metals."}, {"identifier": "C", "content": "Elements of Group 16 have lower ionization enthalpy values compared\nto those of Group 15 in the corresponding periods."}, {"identifier": "... | ["C"] | null | <p>(A) Group 17 elements are halogens; they exist in all three states of matter at room temperature.</p>
<p>(B) Except for the lightest element (boron), all other Group 13 elements are relatively electropositive and are thus metals.</p>
<p>(C) Group 15 elements have half-filled electronic configuration, thus have hig... | mcq | jee-main-2016-online-10th-april-morning-slot | 3,109 |
VF0l4Bnb6dMOXU2M6l1CM | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in + 1 and + 3 oxidation states. This is due to : | [{"identifier": "A", "content": "inert pair effect "}, {"identifier": "B", "content": "diagonal relationship "}, {"identifier": "C", "content": "lattice structure"}, {"identifier": "D", "content": "lanthanoid contraction"}] | ["A"] | null | Electronic configuration of Thallium (Tl) is
<br>= [Xe]4f<sup>14</sup> 5d<sup>10</sup> 6s<sup>2</sup> 6p<sup>1</sup>
<br><br>Here because of poor sheilding of 4f and 5d orbital on 6s orbital, electrons of 6s orbital is more tightly held by the nucleus and perticipate less in bond formation. This is called as innert pa... | mcq | jee-main-2019-online-9th-january-morning-slot | 3,110 |
gCYe4UHRQA58hYaW4OMVT | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | The lathanide ion that would show colour is : | [{"identifier": "A", "content": "Sm<sup>3+</sup>"}, {"identifier": "B", "content": "Gd<sup>3+</sup>"}, {"identifier": "C", "content": "Lu<sup>3+</sup>"}, {"identifier": "D", "content": "La<sup>3+</sup>"}] | ["A"] | null | Electronic configuration of
<br><br>Sm = [Xe] 4f<sup>6</sup> 6s<sup>2</sup>
<br><br>$$ \therefore $$ Electronic configuration of
<br><br>Sm<sup>+3</sup> = [Xe] 4f<sup>5</sup>
<br><br>Sm<sup>+3</sup> shows yellow colour due to partially filled f orbital and f-f transition.
<br><br>Electronic configuration of
<br><br>... | mcq | jee-main-2019-online-8th-april-morning-slot | 3,112 |
xHFNpBdzLG5c0XnCu5seX | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | The IUPAC symbol for the element with atomic
number 119 would be : | [{"identifier": "A", "content": "uun"}, {"identifier": "B", "content": "une"}, {"identifier": "C", "content": "uue"}, {"identifier": "D", "content": "unh"}] | ["C"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264919/exam_images/cldq9i3yigvqhbjuaeqn.webp"><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267181/exam_images/efbfk8nfrct4lg5vtw2j.webp" style="max-width: 100%;height: auto;display: block;margi... | mcq | jee-main-2019-online-8th-april-evening-slot | 3,113 |
Sv6vXzQkXSGQA5qck57k9k2k5idpeyw | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | The electronic configurations of bivalent
europium and trivalent cerium are<br/>
(atomic number : Xe = 54, Ce = 58, Eu = 63) | [{"identifier": "A", "content": "[Xe] 4f<sup>7</sup> 6s<sup>2</sup> and [Xe] 4f<sup>2</sup> 6s<sup>2</sup>"}, {"identifier": "B", "content": "[Xe] 4f<sup>2</sup> and [Xe] 4f<sup>7</sup>"}, {"identifier": "C", "content": "[Xe] 4f<sup>4</sup> and [Xe] 4f<sup>9</sup>"}, {"identifier": "D", "content": "[Xe] 4f<sup>7</sup> ... | ["D"] | null | Eu<sup>2+</sup> : [xe] 4f<sup>7</sup>
<br><br>Ce<sup>3+</sup> : [xe] 4f<sup>1</sup> | mcq | jee-main-2020-online-9th-january-morning-slot | 3,114 |
mMnYC6nuD5wVAQcDgWjgy2xukf2bqnap | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | The atomic number of the element unnilennium is : | [{"identifier": "A", "content": "109"}, {"identifier": "B", "content": "102"}, {"identifier": "C", "content": "119"}, {"identifier": "D", "content": "108"}] | ["A"] | null | For Unnilennium
<br><br>IUPAC symbol – Une
<br><br>Atomic No. – 109 | mcq | jee-main-2020-online-3rd-september-morning-slot | 3,115 |
940D1wmXBAMZmuPmmK1kmitht5n | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are : | [{"identifier": "A", "content": "X and Y are metalloids and Z is a metal."}, {"identifier": "B", "content": "X and Z are non-metals and Y is a metalloid."}, {"identifier": "C", "content": "X is a metalloid, Y is a non-metal and Z is a metal."}, {"identifier": "D", "content": "X, Y and Z are metals."}] | ["C"] | null | X(Z = 33) = As (metalloid)<br><br>
Y(Z = 53) = I (non-metal)<br><br>
Z(Z = 83) = Bi (metal) | mcq | jee-main-2021-online-16th-march-evening-shift | 3,118 |
1krt34xum | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Which one of the following statements for D.I. Mendeleeff, is incorrect? | [{"identifier": "A", "content": "He authored the textbook - Principles of Chemistry"}, {"identifier": "B", "content": "At the time, he proposed Periodic Table of elements structure of atom was known."}, {"identifier": "C", "content": "Element with atomic number 101 is named after him."}, {"identifier": "D", "content": ... | ["B"] | null | In 1869, the Russian chemist Dmitri Mendeleev came to prominence with his tabular diagram of known elements, but basic atomic structure the idea that everything is made of atoms was pioneered by John Dalton (1766-1844) in a book he published in 1808. | mcq | jee-main-2021-online-22th-july-evening-shift | 3,119 |
1ktjxabk7 | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Match List - I with List - II :<br/><br/><table>
<thead>
<tr>
<th></th>
<th>List - I<br/>(Metal Ion)</th>
<th></th>
<th>List - II<br/>(Group of Qualitative analysis)</th>
</tr>
</thead>
<tbody>
<tr>
<td>(a)</td>
<td>$$M{n^{2 + }}$$</td>
<td>(i)</td>
<td>Group - III</td>
</tr>
<tr>
<td>(b)</td>
<td>$$A{s^{3 + }}$$</td>
... | [{"identifier": "A", "content": "(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)"}, {"identifier": "B", "content": "(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)"}, {"identifier": "C", "content": "(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)"}, {"identifier": "D", "content": "(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)"}] | ["B"] | null | Mn<sup>2+</sup> $$\to$$ IV group<br><br>As<sup>3+</sup> $$\to$$ II B group<br><br>Cu<sup>2+</sup> $$\to$$ II A group<br><br>Al<sup>3+</sup> $$\to$$ III group
<br/><br/><b>Note :</b>
<br/><br/>IV<sup>th</sup> group cations – Zn<sup>2+</sup>
,Mn<sup>2+</sup>
,Ni<sup>2+</sup>
, Co<sup>2+</sup>
<br/><br/> II B group cation... | mcq | jee-main-2021-online-31st-august-evening-shift | 3,120 |
1ldr4anoy | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <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 - II, B - IV, C - I, D - III"}, {"identifier": "B", "content": "A - IV, B - III, C - II, D - I"}, {"identifier": "C", "content": "A - IV, B - II, C - I, D - III"}, {"identifier": "D", "content": "A - I, B - III, C - IV, D - II"}] | ["C"] | null | <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;border-width:1px;font-family:Arial,... | mcq | jee-main-2023-online-30th-january-morning-shift | 3,125 |
1lh322ick | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Which one of the following elements will remain as liquid inside pure boiling water?</p> | [{"identifier": "A", "content": "Li"}, {"identifier": "B", "content": "Br"}, {"identifier": "C", "content": "Cs"}, {"identifier": "D", "content": "Ga"}] | ["D"] | null | <p>The melting point of gallium is very low (about 29.76°C or 85.57°F). Therefore, gallium can melt just from the heat of one's hand. The boiling point of gallium, on the other hand, is quite high (2400°C or 4352°F).</p>
<p>On the contrary, water boils at 100°C (212°F) under normal atmospheric pressure. Therefore, ... | mcq | jee-main-2023-online-6th-april-evening-shift | 3,126 |
lsaoyqb0 | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Given below are two statements :<br/><br/>
<b>Statement (I)</b> : Both metals and non-metals exist in p and d-block elements.<br/><br/>
<b>Statement (II)</b> : Non-metals have higher ionisation enthalpy and higher electronegativity than the metals.
<br/><br/>
In the light of the above statements, choose the <b>most app... | [{"identifier": "A", "content": "Both Statement I and Statement II are false"}, {"identifier": "B", "content": "Both Statement I and Statement II are true"}, {"identifier": "C", "content": "Statement I is false but Statement II is true"}, {"identifier": "D", "content": "Statement I is true but Statement II is false"}] | ["C"] | null | <p>To answer this question, let's investigate both statements in detail.</p>
<p><b>Statement (I): Both metals and non-metals exist in p and d-block elements.</b></p>
<p>The periodic table is divided into blocks based on the electron configuration of the elements. These blocks are labeled s, p, d, and f. The p-block con... | mcq | jee-main-2024-online-1st-february-evening-shift | 3,127 |
jaoe38c1lsfp8dv0 | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Anomalous behavior of oxygen is due to its</p> | [{"identifier": "A", "content": "large size and low electronegativity\n"}, {"identifier": "B", "content": "small size and high electronegativity\n"}, {"identifier": "C", "content": "small size and low electronegativity\n"}, {"identifier": "D", "content": "large size and high electronegativity"}] | ["B"] | null | <p>Fact Based.</p> | mcq | jee-main-2024-online-29th-january-evening-shift | 3,129 |
1lsg7tdbj | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:</p>
<p>Assertion A: $$\mathrm{H}_2 \mathrm{Te}$$ is more acidic than $$\mathrm{H}_2 \mathrm{~S}$$.</p>
<p>Reason R: Bond dissociation enthalpy of $$\mathrm{H}_2 \mathrm{Te}$$ is lower than $$\mathrm{H}_2 \mathrm{~S}... | [{"identifier": "A", "content": "Both $$A$$ and $$R$$ are true and $$R$$ is the correct explanation of $$A$$.\n"}, {"identifier": "B", "content": "Both $$A$$ and $$R$$ are true but $$R$$ is NOT the correct explanation of $$A$$.\n"}, {"identifier": "C", "content": "$$A$$ is false but $$R$$ is true.\n"}, {"identifier": "... | ["A"] | null | <p>Due to lower Bond dissociation enthalpy of $$\mathrm{H}_2 \mathrm{Te}$$ it ionizes to give $$\mathrm{H}^{+}$$ more easily than $$\mathrm{H}_2 \mathrm{S}$$.</p> | mcq | jee-main-2024-online-30th-january-evening-shift | 3,130 |
1lsgy4z4q | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Match List I with List II.</p>
<p><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;b... | [{"identifier": "A", "content": "(A)-(III), (B)-(IV), (C)-(I), (D)-(II)"}, {"identifier": "B", "content": "(A)-(I), (B)-(II), (C)-(III), (D)-(IV)"}, {"identifier": "C", "content": "(A)-(IV), (B)-(III), (C)-(I), (D)-(II)"}, {"identifier": "D", "content": "(A)-(II), (B)-(I), (C)-(IV), (D)-(III)"}] | ["A"] | null | <p>$$\begin{gathered}
{ }_{24} \mathrm{Cr} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1 ; \mathrm{Cr}^{2+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^4 \\
{ }_{25} \mathrm{Mn} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{s}^2 ; \mathrm{Mn}^{+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{s}^1 \\
{ }... | mcq | jee-main-2024-online-30th-january-morning-shift | 3,131 |
1lsgzb1nh | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>If IUPAC name of an element is "Unununnium" then the element belongs to n<sup>th</sup> group of Periodic table. The value of n is ________.</p> | [] | null | 11 | <p>The IUPAC name "Unununnium" is derived from a systematic element naming method based on the atomic number of elements, primarily used for elements that have not yet been discovered or were not yet officially named at the time. The name "Unununnium" is composed of Latin and Greek numerical roots and can be broken dow... | integer | jee-main-2024-online-30th-january-morning-shift | 3,132 |
luxwem87 | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Match List I with List II</p>
<p><style type="text/css">
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.tg th{border-color:black;border-style:solid;bo... | [{"identifier": "A", "content": "A-IV, B-III, C-II, D-I"}, {"identifier": "B", "content": "A-I, B-IV, C-III, D-II\n"}, {"identifier": "C", "content": "A-III, B-II, C-I, D-IV\n"}, {"identifier": "D", "content": "A-II, B-I, C-IV, D-III"}] | ["C"] | null | <p>To match each element with its correct electronic configuration, let's consider the electronic configurations of each element based on their positions in the periodic table:</p>
<ul>
<li><b>Nitrogen (N)</b>: It is in the 2nd period and belongs to the p-block, specifically group 15. The electronic configuration of ni... | mcq | jee-main-2024-online-9th-april-evening-shift | 3,133 |
lv0vyr68 | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Number of elements from the following that CANNOT form compounds with valencies which match with their respective group valencies is ________. B, C, N, S, O, F, P, Al, Si</p> | [{"identifier": "A", "content": "7"}, {"identifier": "B", "content": "3"}, {"identifier": "C", "content": "5"}, {"identifier": "D", "content": "6"}] | ["B"] | null | <p>N, F and O will not satisfy the given condition.</p> | mcq | jee-main-2024-online-4th-april-morning-shift | 3,134 |
lv5grwf0 | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | Match List I with List II
<p><style type="text/css">
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.tg th{border-color:black;border-style:solid;border-wi... | [{"identifier": "A", "content": "A-III, B-II, C-I, D-IV\n"}, {"identifier": "B", "content": "A-II, B-I, C-IV, D-III\n"}, {"identifier": "C", "content": "A-II, B-III, C-IV, D-I\n"}, {"identifier": "D", "content": "A-IV, B-III, C-II, D-I"}] | ["D"] | null | <p>To match the elements from List I with their corresponding properties in List II, let's analyze each pair:</p>
<p>A. $$\mathrm{Cl,S}$$<br>
<p>These elements are known for having high negative electron gain enthalpy (energy released when an electron is added to an atom). Chlorine ($$\mathrm{Cl}$$) and sulfur ($$\ma... | mcq | jee-main-2024-online-8th-april-morning-shift | 3,135 |
lv7v3yys | chemistry | periodic-table-and-periodicity | periodic-table-and-its-features | <p>Given below are two statements:</p>
<p>Statement I: In group 13, the stability of +1 oxidation state increases down the group.</p>
<p>Statement II : The atomic size of gallium is greater than that of aluminium.</p>
<p>In the light of the above statements, choose the most appropriate answer from the options given bel... | [{"identifier": "A", "content": "Statement I is incorrect but Statement II is correct\n"}, {"identifier": "B", "content": "Statement I is correct but Statement II is incorrect\n"}, {"identifier": "C", "content": "Both Statement I and Statement II are correct\n"}, {"identifier": "D", "content": "Both Statement I and Sta... | ["B"] | null | <h3><strong>Statement I:</strong></h3>
<p><strong>"In group 13, the stability of +1 oxidation state increases down the group."</strong></p>
<p><strong>Analysis:</strong></p>
<p><p><strong>Group 13 Elements:</strong></p></p>
<p><p><strong>Boron (B)</strong></p></p>
<p><p><strong>Aluminum (Al)</strong></p></p>
<p><p><st... | mcq | jee-main-2024-online-5th-april-morning-shift | 3,136 |
YeX4D66ntKuoZcBd | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which of the following is fully fluorinated polymer? | [{"identifier": "A", "content": "Neoprene "}, {"identifier": "B", "content": "Teflon "}, {"identifier": "C", "content": "Thiokol"}, {"identifier": "D", "content": "PVC "}] | ["B"] | null | Teflon is polymer of $$C{F_2} = C{F_2}.$$ | mcq | aieee-2005 | 3,137 |
QwvPIUuSCTHSZtrX | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Bakelite is obtained from phenol by reacting with | [{"identifier": "A", "content": "(CH<sub>2</sub>OH)<sub>2</sub>"}, {"identifier": "B", "content": "CH<sub>3</sub>CHO "}, {"identifier": "C", "content": "CH<sub>3</sub>COCH<sub>3</sub>"}, {"identifier": "D", "content": "HCHO "}] | ["D"] | null | Bakelite is formed by the reaction of formaldehyde $$(HCHO)$$ and phenol so the correct answer is $$(d).$$
<br><br><img class="question-image" src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267395/exam_images/psdiflaammr6fi4feeck.webp" loading="lazy" alt="AIEEE 2008 Chemistry - Polymers Question 75 English... | mcq | aieee-2008 | 3,138 |
FWM2x5VmTTiK6h1z | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Buna-$$N$$ synthetic rubber is a copolymer of : | [{"identifier": "A", "content": "$${H_2}C = CH - CH = C{H_2}$$ \n<br><br>and $$\\,\\,\\,\\,\\,$$ $${H_5}{C_6} - CH = C{H_2}$$ "}, {"identifier": "B", "content": "$${H_2}C = CH - CN$$ \n<br><br>and $$\\,\\,\\,\\,\\,$$ $${H_2}C = CH - CH = C{H_2}$$ "}, {"identifier": "C", "content": "<img class=\"question-image\" src=\"h... | ["B"] | null | Buna $$-$$ $$N$$ is a copolymer of butadiene $$\left( {C{H_2} = CH - CH = C{H_2}} \right)$$ and acrylonitrile $$\left( {C{H_2} = CHCN} \right).$$ | mcq | aieee-2009 | 3,139 |
WP3xzSnO7nC81kA7 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The species which can best serve as an initiator for the cationic polymerization is : | [{"identifier": "A", "content": "LiAlH<sub>4</sub>"}, {"identifier": "B", "content": "HNO<sub>3</sub>"}, {"identifier": "C", "content": "AlCl<sub>3</sub>"}, {"identifier": "D", "content": "BuLi"}] | ["C"] | null | Lewis acids are the most common compounds used for initiation of cationic polymerisation. The more popular Lewis acids are $$SnC{l_4},\,\,AlC{l_3},\,\,B{F_3}$$ and $$TiC{l_4}.$$ | mcq | aieee-2012 | 3,141 |
TkSb5tPYSS5MarRm | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which one is classified as a condensation polymer? | [{"identifier": "A", "content": "Teflon"}, {"identifier": "B", "content": "Acrylonitrile"}, {"identifier": "C", "content": "Dacron"}, {"identifier": "D", "content": "Neoprene"}] | ["C"] | null | Except Dacron all are additive polymers. Terephthalic acid condenses with ethylene glycol to give Dacron.
<br><br><img class="question-image" src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267523/exam_images/f9mdpbfoy0ydae3zmp7q.webp" loading="lazy" alt="JEE Main 2014 (Offline) Chemistry - Polymers Questio... | mcq | jee-main-2014-offline | 3,142 |
R4DHlOg4ZAVTTAw644EHm | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <b>Assertion : </b>
<br/>Rayon is a semisynthetic polymer whose properties are better than natural cotton.
<br/><br/><b>Reason :</b>
<br/>Mechanical and aesthetic properties of cellulose can be improved by acetylation. | [{"identifier": "A", "content": "Both assertion and reason are correct, and the reason is the correct explanation for the assertion."}, {"identifier": "B", "content": "Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.\n"}, {"identifier": "C", "content": "Assertion i... | ["B"] | null | The strength of cellulose is improved by acetylation to form rayon, a semisynthetic polymer which is better than natural cotton. | mcq | jee-main-2016-online-9th-april-morning-slot | 3,143 |
EvOftvbUZrCOCLi0E1JLf | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which of the following polymers is synthesized using a free radical
polymerization technique ? | [{"identifier": "A", "content": "Teflon"}, {"identifier": "B", "content": "Terylene"}, {"identifier": "C", "content": "Melamine polymer"}, {"identifier": "D", "content": "Nylon 6, 6"}] | ["A"] | null | Terylene, Melamine and Nylon-6, 6 are condensation polymers. Teflon is an addition polymer which is formed by free radical polymerization of its monomer, (CF<sub>2</sub> = CF<sub>2</sub>). | mcq | jee-main-2016-online-10th-april-morning-slot | 3,144 |
9jSxvfgu9skxsFOV | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The formation of which of the following polymers involves hydrolysis reaction? | [{"identifier": "A", "content": "Bakelite\n"}, {"identifier": "B", "content": "Nylon 6, 6"}, {"identifier": "C", "content": "Terylene"}, {"identifier": "D", "content": "Nylon 6"}] | ["D"] | null | Formation of nylon-6 involves hydrolysis of caprolactum, (its monomer) in initial state.
<br><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267390/exam_images/ryc0cszmwqtgt5gmq8d5.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2017 (Offline) Chem... | mcq | jee-main-2017-offline | 3,145 |
nJGP5xn77QHwf97DVBTur | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which of the following is a biodegradable polymer ? | [{"identifier": "A", "content": "<img src=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734267469/exam_images/pkg4cxrl5ztrfewdrxjp.webp\" style=\"max-width: 100%; height: auto;display: block;margin: 0 auto;\" loading=\"lazy\" alt=\"JEE Main 2017 (Online) 9th April Morning Slot Chemistry - Polymers Question 65 ... | ["A"] | null | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267469/exam_images/pkg4cxrl5ztrfewdrxjp.webp" style="max-width: 100%; height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2017 (Online) 9th April Morning Slot Chemistry - Polymers Question 65 English Explanation">
... | mcq | jee-main-2017-online-9th-april-morning-slot | 3,146 |
Zqf5Ila71oIS7x4gEtR4M | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is : | [{"identifier": "A", "content": "<img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/1l7u8ivel/a141dae9-7162-4113-9798-a4981a00cb93/faf342d0-301b-11ed-ab58-4f43f7f8c851/file-1l7u8ivem.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/1l7u8ivel/a141dae9-7162-4113-9798-a4981a00cb93/faf... | ["D"] | null | Polymerisation of styrene with acrylonitrile occurs in presence of peroxide.
<br><br><picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734263365/exam_images/pmf5m6aexugenykrdhej.webp"><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734263798/exam_imag... | mcq | jee-main-2018-online-15th-april-morning-slot | 3,147 |
FOHd2K8fzioZHEExWmxdW | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which of the following statements is <b>not</b> true ? | [{"identifier": "A", "content": "Step growth polymerisation requires a bifunctional monomer."}, {"identifier": "B", "content": "Nylon 6 is an example of step-growth polymerisation. "}, {"identifier": "C", "content": "Chain growth polymerisation includes both homopolymerisation and copylymerisation."}, {"identifier": "D... | ["D"] | null | Chain growth polymerisation is an addition polymerisation which involves homopolymerisation and copolymerisation both. | mcq | jee-main-2018-online-15th-april-evening-slot | 3,148 |
qIJ9ZjI7F6Z8xGU4JTnIv | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The structure of Nylon-6 is : | [{"identifier": "A", "content": "<img src=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734267505/exam_images/i0r2zmsgctnsxuromghk.webp\" style=\"max-width: 100%; height: auto;display: block;margin: 0 auto;\" loading=\"lazy\" alt=\"JEE Main 2019 (Online) 8th April Evening Slot Chemistry - Polymers Question 56 ... | ["C"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734265507/exam_images/bjy8szqk0y6qqpwjfqvf.webp"><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266254/exam_images/bff8esul6j7qe6fatacs.webp" style="max-width: 100%;height: auto;display: block;margi... | mcq | jee-main-2019-online-8th-april-evening-slot | 3,149 |
LvJgYMAUKkGOF5zBiD3rsa0w2w9jx8xqv63 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The correct name of the following polymer is :
<img src="data:image/png;base64,UklGRigLAABXRUJQVlA4IBwLAADQVQCdASrsAtIAPm00l0mkIqIhIRGIkIANiWlu4XVRG/OZ8IfyLtO/pPRVeCvaH09f0/ozv5L+AfwD0N/Xf8b/Jv6r/z/yw+AO8H3kfwH8U/ED5AvSX90/kH9b/4H5XegB3PAAPp3/r/4t/W/F6/aP4x+0HuZ8s3uBfqb/ov5D7S/7r/Y/wD+AeZh5P6nH9K/5n8m/oH66fAb/hfxP+pfuL... | [{"identifier": "A", "content": "Polytert-butylene"}, {"identifier": "B", "content": "Polyisobutane"}, {"identifier": "C", "content": "Polyisobutylene"}, {"identifier": "D", "content": "Polyisoprene"}] | ["C"] | null | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734265866/exam_images/hbgnf2q8wdlu2hudf8zd.webp" style="max-width: 100%; height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2019 (Online) 12th April Evening Slot Chemistry - Polymers Question 51 English Explanation"> | mcq | jee-main-2019-online-12th-april-evening-slot | 3,150 |
aNkWGXORkOhBbtm2GPJ9x | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which of the following compounds is a
constituent of the polymer
<picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264876/exam_images/uwlytp3sqbmmvxmeo3ng.webp"/><img src="data:image/png;base64,UklGRlgHAABXRUJQVlA4IEwHAACQWwCdASqoAvYAP4HA3WU2MS4nIZTZCsAwCWlu4W5xG... | [{"identifier": "A", "content": "N-Methyl urea"}, {"identifier": "B", "content": "Ammonia"}, {"identifier": "C", "content": "Formaldehyde"}, {"identifier": "D", "content": "Methylamine"}] | ["C"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266875/exam_images/dbouiawwf7fuzlafyhh3.webp"><source media="(max-width: 500px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264335/exam_images/caejpavrdrkmpfm2yvjg.webp"><source media="(max-wid... | mcq | jee-main-2019-online-9th-april-evening-slot | 3,154 |
5388TayMCc5WShfkatV3j | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The homopolymer formed from 4-hydroxy-butanoic acid is :
| [{"identifier": "A", "content": "<img src=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734267709/exam_images/zf7svz1alcqoh2m8t501.webp\" style=\"max-width: 100%; height: auto;display: block;margin: 0 auto;\" loading=\"lazy\" alt=\"JEE Main 2019 (Online) 11th January Evening Slot Chemistry - Polymers Question ... | ["C"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734265557/exam_images/t8qwl9kkna4qp5zcihmi.webp"><source media="(max-width: 500px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267197/exam_images/ipezpj2yfkbxz2o67rzx.webp"><source media="(max-wid... | mcq | jee-main-2019-online-11th-january-evening-slot | 3,156 |
a4Ho9K9YLjgEdhgojkBGq | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Major product of the following reaction is :
<br/><br/><img src="data:image/png;base64,UklGRlwKAABXRUJQVlA4IFAKAABQewCdASoAA+gAP4G61WU2LjenItGZuvAwCWlu+DpcC9qOvIjm88/5i13x7fcj2x6v/3boIKu3myl/m1D7/Fb9MO5cxvl1DcuY3y6huXMb5dQ3LmN8ukMyrNcSK0b6ju25HVc/dgo80wx5phjzTDHeCWsDoRNPDyfeoT/q5+7BR5qEYfDA3F4sV+NpuDYJ+ijzTDHmmGPNMMea... | [{"identifier": "A", "content": "<img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/1l8mhpqdc/53bfe272-ca42-486a-91da-a10e6ccfedf8/de122c00-3fa5-11ed-835d-8b6c97a43374/file-1l8mhpqdd.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/1l8mhpqdc/53bfe272-ca42-486a-91da-a10e6ccfedf8/de1... | ["D"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l8mhqql8/bf1aa096-4239-44f6-91ee-718763830023/fa0ca5c0-3fa5-11ed-835d-8b6c97a43374/file-1l8mhqql9.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l8mhqql8/bf1aa096-4239-44f6-91ee-718763830023/fa0ca5c0-3fa5-11ed-835d-8b6c97a43374/fi... | mcq | jee-main-2019-online-9th-january-morning-slot | 3,159 |
xz5XA6Uy8Yx5c65wuEqWB | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The two monomers for the synthesis of Nylon 6, 6 are | [{"identifier": "A", "content": "HOOC(CH<sub>2</sub>)<sub>6</sub>COOH, H<sub>2</sub>N(CH<sub>2</sub>)<sub>4</sub>NH<sub>2</sub> "}, {"identifier": "B", "content": "HOOC(CH<sub>2</sub>)<sub>4</sub>COOH, H<sub>2</sub>N(CH<sub>2</sub>)<sub>6</sub>NH<sub>2</sub>"}, {"identifier": "C", "content": "HOOC(CH<sub>2</sub>)<sub>4... | ["B"] | null | Nylon $$-$$6, 6 is <i>an</i> amide polymer.
<br><br>Amide polymer is created using the monomer of amine and acid.
<br><br>Nylon $$-$$ 6, 6 is created using 6 carbon amine and 6 carbon acid.
<br><br>So, the amine is,
<br><br> H<sub>2</sub>N $$-$$ (CH<sub>2</sub>)<sub><sub>6</sub></sub... | mcq | jee-main-2019-online-12th-january-evening-slot | 3,160 |
3Uc01RPfHvBUTEYJ5Gjgy2xukfp2ocze | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which one of the following polymers is not obtained by condensation polymerisation? | [{"identifier": "A", "content": "Bakelite"}, {"identifier": "B", "content": "Nylon 6"}, {"identifier": "C", "content": "Buna-N"}, {"identifier": "D", "content": "Nylon 6, 6"}] | ["C"] | null | Buna-N : Obtained by addition polymerisation
<br><br>Nylon 6, Bakelite, Nylon 6, 6 : Obtained by
condensation polymerisation. | mcq | jee-main-2020-online-5th-september-evening-slot | 3,161 |
4pxrTp0MvVuPb93jNJjgy2xukg0n52mw | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The correct match between Item - I and Item - II
is :
<br/><br/><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... | [{"identifier": "A", "content": "(a) - (IV), (b) - (III), (c) - (II), (d) - (I)"}, {"identifier": "B", "content": "(a) - (III), (b) - (IV), (c) - (I), (d) - (II)"}, {"identifier": "C", "content": "(a) - (III), (b) - (IV), (c) - (II), (d) - (I)"}, {"identifier": "D", "content": "(a) - (IV), (b) - (III), (c) - (I), (d) -... | ["A"] | null | Natural rubber – Polymer of isoprene
<br><br>Neoprene – Polymer of chloroprene
<br><br>Buna N – Polymer of 1,3-Butadiene and
acrylonitrile
<br><br>Buna S – Polymer of 1,3-Butadiene and
styrene | mcq | jee-main-2020-online-6th-september-evening-slot | 3,162 |
RDgdTViEFKoqMHR4ZSjgy2xukfupb477 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Consider the Assertion and Reason given
below.
<br/><br/>Assertion (A) : Ethene polymerized in the
presence of Ziegler Natta Catalyst at high
temperature and pressure is used to make
buckets and dustbins.
<br/><br/>Reason (R) : High density polymers are closely
packed and are chemically inert.
<br/><br/>Choose the corr... | [{"identifier": "A", "content": "Both (A) and (R) are correct and (R) is the\ncorrect explanation of (A)."}, {"identifier": "B", "content": "Both (A) and (R) are correct but (R) is not\nthe correct explanation of (A)."}, {"identifier": "C", "content": "(A) is correct but (R) is wrong."}, {"identifier": "D", "content": ... | ["A"] | null | High density polyethene is hard and chemically
inert thats why used to make buckets and
dustbins. | mcq | jee-main-2020-online-6th-september-morning-slot | 3,163 |
B8frC15krJkPnwFBdf7k9k2k5lkxwrs | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which polymer has 'chiral' monomer(s) ? | [{"identifier": "A", "content": "Nylon 6,6"}, {"identifier": "B", "content": "Buna-N"}, {"identifier": "C", "content": "PHBV"}, {"identifier": "D", "content": "Neoprene"}] | ["C"] | null | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264235/exam_images/oyuczhufj6gagu1ge5ka.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Polymers Question 49 English Explanation"> | mcq | jee-main-2020-online-9th-january-evening-slot | 3,164 |
W9iW02p231FVoeLQMR7k9k2k5hlu26t | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Preparation of Bakelite proceeds via reactions. | [{"identifier": "A", "content": "Electrophilic substitution and dehydration"}, {"identifier": "B", "content": "Condensation and elimination"}, {"identifier": "C", "content": "Nucleophilic addition and dehydration"}, {"identifier": "D", "content": "Electrophilic addition and dehydration"}] | ["A"] | null | Formation of Bakelite follows electrophillic substitution of phenol and formaldehyde followed by
dehydration. | mcq | jee-main-2020-online-8th-january-evening-slot | 3,165 |
mVNWmmA8w3jSuVLJMb1klrens2x | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Match <b>List I</b> with <b>List II</b>.<br/><br/>
<style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;width:100%}
.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:bl... | [{"identifier": "A", "content": "(a) \u2192 (iv), (b) \u2192 (iii), (c) \u2192 (ii), (d) \u2192 (i)"}, {"identifier": "B", "content": "(a) \u2192 (iii), (b) \u2192 (iv), (c) \u2192 (i), (d) \u2192 (ii)"}, {"identifier": "C", "content": "(a) \u2192 (ii), (b) \u2192 (i), (c) \u2192 (iv), (d) \u2192 (iii)"}, {"identifier"... | ["B"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1kxhcwt4r/8ef53847-3aec-4510-92a1-274be14257cf/c8ceb4b0-630c-11ec-877b-854219a26a55/file-1kxhcwt4s.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1kxhcwt4r/8ef53847-3aec-4510-92a1-274be14257cf/c8ceb4b0-630c-11ec-877b-854219a26a55/fi... | mcq | jee-main-2021-online-24th-february-morning-slot | 3,166 |
b9RT4YAVDThny2AXZx1klrtm24v | chemistry | polymers | classification,-preparations-and-properties-of-polymers | In polymer Buna-S : 'S' stands for : | [{"identifier": "A", "content": "Sulphur"}, {"identifier": "B", "content": "Styrene"}, {"identifier": "C", "content": "Strength"}, {"identifier": "D", "content": "Sulphonation"}] | ["B"] | null | <p>Buna-S is the co-polymer of but 1, 3-diene and styrene as follows.</p>
<img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l3qsm016/864ef66c-2270-474c-a5e4-e9c50a43830a/886c00a0-df06-11ec-b17a-f1edf5965e5d/file-1l3qsm017.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l3qsm016/86... | mcq | jee-main-2021-online-24th-february-evening-slot | 3,167 |
SoMqm4ToKUcx0J8LuX1klsbnov6 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Which statement is correct? | [{"identifier": "A", "content": "Buna-N is a natural polymer."}, {"identifier": "B", "content": "Synthesis of Buna-S needs nascent oxygen."}, {"identifier": "C", "content": "Buna-S is a synthetic and linear thermosetting polymer."}, {"identifier": "D", "content": "Neoprene is an addition copolymer used in plastic bucke... | ["B"] | null | Buna-S is an elastomer
<br><br> Buna-N is a synthetic polymer
<br><br> Buna-S is polymerised by addition
polymerisation method which needs
radical initiator for chain propagation step.
Nascent oxygen can be used as an Radical
initiator.
<br><br>Neoprene is a synthetic rubber. | mcq | jee-main-2021-online-25th-february-morning-slot | 3,168 |
I4GLr1CJdSBGJ5alDr1kludpfpx | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The structure of Neoprene is : | [{"identifier": "A", "content": "<img src=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734264285/exam_images/aiv3s7uy2sg8c20ialye.webp\" style=\"max-width: 100%;height: auto;display: block;margin: 0 auto;\" loading=\"lazy\" alt=\"JEE Main 2021 (Online) 26th February Morning Shift Chemistry - Polymers Question ... | ["A"] | null | Neoprene is a polymer of monomer
chloroprene.
<img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267102/exam_images/xmnf1ah8tf9ey5kk1s4j.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2021 (Online) 26th February Morning Shift Chemistry - Polymers Que... | mcq | jee-main-2021-online-26th-february-morning-slot | 3,169 |
1krrira42 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Bakelite is a cross-linked polymer of formaldehyde and : | [{"identifier": "A", "content": "PHBV"}, {"identifier": "B", "content": "Buna-S"}, {"identifier": "C", "content": "Novolac"}, {"identifier": "D", "content": "Dacron"}] | ["C"] | null | Novolac (phenol formaldehyde Resin) $$\to$$ Bakelite | mcq | jee-main-2021-online-20th-july-evening-shift | 3,171 |
1krurl06m | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <img src="data:image/png;base64,UklGRp4QAABXRUJQVlA4IJIQAADQXQCdASr9AaUAPm00l0ikIqIhItEKSIANiWlu4W++AGtCB4T0viH+J/kp4Gf3j+r/tX4jPmv7v+R/p8fs3lD52/wHby+5fx3+re9v86/y/8c/t3/D81fed/MfxX2C/UP9o/i/8//1f9U9Nf6R/0Tw7q5f5n+AewX7YfKf7N/G/6T/4v698P/qX9r/lPqj8p/uA/qj/rf4J/S/Sx/4H8r/jXna0CPyP/oP53/Tf2i9/7+6/h/9M/cf23fNn/T/jP94+R39... | [{"identifier": "A", "content": "Novolac"}, {"identifier": "B", "content": "Buna-N"}, {"identifier": "C", "content": "Acrilan "}, {"identifier": "D", "content": "Neoprene"}] | ["A"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266670/exam_images/sjsdejbjn7vptud22drj.webp"><source media="(max-width: 500px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734263727/exam_images/zyaa7hsq9s6ojpd09mqh.webp"><img src="https://res.c... | mcq | jee-main-2021-online-25th-july-morning-shift | 3,173 |
1krx4v5by | chemistry | polymers | classification,-preparations-and-properties-of-polymers | A biodegradable polyamide can be made from : | [{"identifier": "A", "content": "Glycine and isoprene"}, {"identifier": "B", "content": "Hexamethylene diamine and adipic acid"}, {"identifier": "C", "content": "Glycine and aminocaproic acid"}, {"identifier": "D", "content": "Styrene and caproic acid"}] | ["C"] | null | A biodegradable polyamide nylon-2-Nylon-6 is made from glycine and amino caproic acid | mcq | jee-main-2021-online-25th-july-evening-shift | 3,174 |
1ktb3yln3 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | The polymer formed on heating Novolac with formaldehyde is : | [{"identifier": "A", "content": "Bakelite"}, {"identifier": "B", "content": "Polyester"}, {"identifier": "C", "content": "Melamine"}, {"identifier": "D", "content": "Nylon 6, 6"}] | ["A"] | null | Novolac + formaldehyde $$\to$$ Bakelite | mcq | jee-main-2021-online-26th-august-morning-shift | 3,175 |
1ktial1be | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Monomer of Novolac is : | [{"identifier": "A", "content": "3-Hydroxybutanoic acid"}, {"identifier": "B", "content": "phenol and melamine"}, {"identifier": "C", "content": "o-Hydroxymethylphenol"}, {"identifier": "D", "content": "1, 3-Butadiene and styrene"}] | ["C"] | null | <img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734264839/exam_images/lf7usqjfnwtgaejskgxf.webp" style="max-width: 100%;height: auto;display: block;margin: 0 auto;" loading="lazy" alt="JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Polymers Question 34 English Explanation"> | mcq | jee-main-2021-online-31st-august-morning-shift | 3,176 |
1ktn0labb | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Monomer units of Dacron polymer are : | [{"identifier": "A", "content": "ethylene glycol and phthalic acid"}, {"identifier": "B", "content": "ethylene glycol and terephthalic acid"}, {"identifier": "C", "content": "glycerol and terephthalic acid"}, {"identifier": "D", "content": "glycerol and phthalic acid"}] | ["B"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1kwlzwof9/87662fdb-adb2-49c0-82d3-a49bd4478fcc/a25c0d50-51cd-11ec-be54-a1f0ca310b48/file-1kwlzwofa.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1kwlzwof9/87662fdb-adb2-49c0-82d3-a49bd4478fcc/a25c0d50-51cd-11ec-be54-a1f0ca310b48/fi... | mcq | jee-main-2021-online-1st-september-evening-shift | 3,178 |
1l549paa8 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>The polymer, which can be stretched and remains its original status on releasing the force is</p> | [{"identifier": "A", "content": "Bakelite."}, {"identifier": "B", "content": "Nylon 6, 6."}, {"identifier": "C", "content": "Buna-N."}, {"identifier": "D", "content": "Terylene."}] | ["C"] | null | <p>Buna – N is synthetic rubber which can be
stretched and retains its original status on releasing
the force.</p> | mcq | jee-main-2022-online-29th-june-morning-shift | 3,179 |
1l55nog1e | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Given below are two statements, one is Assertion (A) and other is Reason (R).</p>
<p>Assertion (A) : Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties.</p>
<p>Reason (R) : The cis-polyisoprene molecules consist of various chains held together by strong polar interactions ... | [{"identifier": "A", "content": "Both (A) and (R) are true and (R) is the correct explanation of (A)."}, {"identifier": "B", "content": "Both (A) and (R) are true but (R) is not the correct explanation of (A)."}, {"identifier": "C", "content": "(A) is true but (R) is false."}, {"identifier": "D", "content": "(A) is fal... | ["C"] | null | Natural rubber is linear polymer of isoprene (2-
methyl-1,3-butadiene) and is also called cis-1,4-
polyisoprene. The cis-polyisoprene molecules
consists of various chains held together by weak
Vander Waal‟s interactions and has a coiled
structure. | mcq | jee-main-2022-online-28th-june-evening-shift | 3,181 |
1l56b7da8 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Which one of the following is NOT a copolymer?</p> | [{"identifier": "A", "content": "Buna-S"}, {"identifier": "B", "content": "Neoprene"}, {"identifier": "C", "content": "PHBV"}, {"identifier": "D", "content": "Butadiene-styrene"}] | ["B"] | null | <p>A copolymer is a polymer that consists of two or more different types of monomers.</p>
<p>Here are the options examined:</p>
<ul>
<li><strong>Option A: Buna-S</strong> - It's a copolymer of butadiene and styrene.</li><br/>
<li><strong>Option B: Neoprene</strong> - It is made from the polymerization of chloropren... | mcq | jee-main-2022-online-28th-june-morning-shift | 3,182 |
1l56y6k1k | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Which is true about Buna-N?</p> | [{"identifier": "A", "content": "It is a linear polymer of 1, 3-butadiene."}, {"identifier": "B", "content": "It is obtained by copolymerization of 1, 3-butadiene and styrene."}, {"identifier": "C", "content": "It is obtained by copolymerization of 1, 3-butadiene and acrylonitrile."}, {"identifier": "D", "content": "Th... | ["C"] | null | It is copolymerization of 1, 3-butadiene and acrylonitrile. | mcq | jee-main-2022-online-27th-june-evening-shift | 3,183 |
1l58e8t8z | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Which of the following sets are correct regarding polymer?</p>
<p>(A) Copolymer : Buna-S</p>
<p>(B) Condensation polymer : Nylon-6,6</p>
<p>(C) Fibres : Nylon-6,6</p>
<p>(D) Thermosetting polymer : Terylene</p>
<p>(E) Homopolymer : Buna-N</p>
<p>Choose the correct answer from given options below :</p> | [{"identifier": "A", "content": "(A), (B) and (C) are correct"}, {"identifier": "B", "content": "(B), (C) and (D) are correct"}, {"identifier": "C", "content": "(A), (C) and (E) are correct"}, {"identifier": "D", "content": "(A), (B) and (D) are correct"}] | ["A"] | null | (A) Buna-S $\quad-\quad$ Copolymer
<br/><br/>
(B) Nylon-6,6 $\quad-\quad$ Condensation polymer
<br/><br/>
(C) Nylon-6,6 - Fibre
<br/><br/>
(D) Terylene $\quad-\quad$ Thermoplastic
<br/><br/>
(E) Buna-N $\quad-\quad$ Copolymer
<br/><br/>
$$ \therefore $$ A, B and C are correct. | mcq | jee-main-2022-online-26th-june-morning-shift | 3,184 |
1l5c6v0eg | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Which of the following is an example of polyester?</p> | [{"identifier": "A", "content": "Butadiene-styrene copolymer"}, {"identifier": "B", "content": "Melamine polymer"}, {"identifier": "C", "content": "Neoprene"}, {"identifier": "D", "content": "Poly-$$\\beta$$-hydroxybutyrate-co-$$\\beta$$-hydroxyvalerate"}] | ["D"] | null | Polyesters are formed by condensation reaction between alcohols and carboxylic acid.
<br><br>
Poly- $\beta$-hydroxybutyrate-co- $\beta$-hydroxy valerate (PHBV) is a polymer obtained by condensation reaction of 3-hydroxybutanoic acid with 3-hydroxypentanoic acid.<br><br>
<img src="https://app-content.cdn.examgoal.net/fl... | mcq | jee-main-2022-online-24th-june-morning-shift | 3,186 |
1l5w6dzq2 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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:sol... | [{"identifier": "A", "content": "(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)"}, {"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)-(i), (d)-(iv)"}] | ["C"] | null | Neoprene Polymer has structure.<br><br>
<img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l8juqm7p/c435e73b-8c73-4be7-a46f-624e1c19cac8/73663b40-3e32-11ed-8849-97e53a4fcf41/file-1l8juqm7q.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l8juqm7p/c435e73b-8c73-4be7-a46f-624e1c19cac8... | mcq | jee-main-2022-online-30th-june-morning-shift | 3,187 |
1l6i5ne6q | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Vulcanization of rubber is carried out by heating a mixture of</p> | [{"identifier": "A", "content": "isoprene and styrene"}, {"identifier": "B", "content": "neoprene and sulphur"}, {"identifier": "C", "content": "isoprene and sulphur"}, {"identifier": "D", "content": "neoprene and styrene"}] | ["C"] | null | When a mixture of isoprene and sulphur is heated,
isoprene gets polymerised to natural rubber and
then vulcanization of natural rubber with sulphur
takes place. | mcq | jee-main-2022-online-26th-july-evening-shift | 3,189 |
1l6jlzhn2 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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;b... | [{"identifier": "A", "content": "A-II, B-III, C-IV, D-I"}, {"identifier": "B", "content": "A-II, B-III, C-I, D-IV"}, {"identifier": "C", "content": "A-II, B-I, C-III, D-IV"}, {"identifier": "D", "content": "A-III, B-II, C-IV, D-I"}] | ["B"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l7nrr53g/eb9bc6fc-30e9-489c-957d-a6404714a6be/b1d12cc0-2c8d-11ed-a521-1f85f535c206/file-1l7nrr53h.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l7nrr53g/eb9bc6fc-30e9-489c-957d-a6404714a6be/b1d12cc0-2c8d-11ed-a521-1f85f535c206/fi... | mcq | jee-main-2022-online-27th-july-morning-shift | 3,190 |
1l6kq9u25 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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:sol... | [{"identifier": "A", "content": "$$(\\mathrm{A})-(\\mathrm{II}),(\\mathrm{B})-(\\mathrm{III}),(\\mathrm{C})-(\\mathrm{I}),(\\mathrm{D})-(\\mathrm{IV})$$"}, {"identifier": "B", "content": "$$(\\mathrm{A})-(\\mathrm{II}),(\\mathrm{B})-(\\mathrm{I}),(\\mathrm{C})-(\\mathrm{III}),(\\mathrm{D})-(\\mathrm{IV})$$"}, {"identif... | ["A"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l7oiygm9/8fedd130-941f-4d10-800e-b561c96d79f8/13de9820-2cf8-11ed-a627-29822045a51b/file-1l7oiygma.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l7oiygm9/8fedd130-941f-4d10-800e-b561c96d79f8/13de9820-2cf8-11ed-a627-29822045a51b/fi... | mcq | jee-main-2022-online-27th-july-evening-shift | 3,191 |
1l6mdmsag | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Terylene polymer is obtained by condensation of :</p> | [{"identifier": "A", "content": "Ethane-1,2-diol and Benzene-1,3 dicarboxylic acid"}, {"identifier": "B", "content": "Propane-1, 2-diol and Benzene-1, 4 dicarboxylic acid"}, {"identifier": "C", "content": "Ethane-1,2-diol and Benzene-1, 4 dicarboxylic acid"}, {"identifier": "D", "content": "Ethane-1,2-diol and Benzene-... | ["C"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l7oxb78z/e90c99af-1bba-4f8e-b25e-601bd5c91566/35f56c30-2d30-11ed-b144-5949e1cb6ba8/file-1l7oxb790.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l7oxb78z/e90c99af-1bba-4f8e-b25e-601bd5c91566/35f56c30-2d30-11ed-b144-5949e1cb6ba8/fi... | mcq | jee-main-2022-online-28th-july-morning-shift | 3,192 |
1l6rky5ms | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Which of the following is NOT a natural polymer?</p> | [{"identifier": "A", "content": "Protein"}, {"identifier": "B", "content": "Starch"}, {"identifier": "C", "content": "Rubber"}, {"identifier": "D", "content": "Rayon"}] | ["D"] | null | <p>Starch, Protein, Rubber are natural polymer.</p>
<p>Rayon is a semi-synthetic fiber, made from natural sources of regenerated cellulose, such as wood and
related agricultural products.</p> | mcq | jee-main-2022-online-29th-july-evening-shift | 3,194 |
1ldr3aqxm | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Caprolactam when heated at high temperature in presence of water, gives</p> | [{"identifier": "A", "content": "Dacron"}, {"identifier": "B", "content": "Nylon 6"}, {"identifier": "C", "content": "Teflon"}, {"identifier": "D", "content": "Nylon 6,6"}] | ["B"] | null | <p>Caprolactum $$\buildrel \Delta \over
\longrightarrow $$ Nylon $$-$$ 6</p>
<p><img src="https://app-content.cdn.examgoal.net/fly/@width/image/1lepyxnh0/cc84f27c-752d-4920-96e1-3069f57ba68e/dbb8fd40-b858-11ed-8195-4f3c56fa1eb5/file-1lepyxnh1.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1lep... | mcq | jee-main-2023-online-30th-january-morning-shift | 3,195 |
1ldsdegdx | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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-II, B-I, C-IV, D-III"}, {"identifier": "B", "content": "A-IV, B-I, C-III, D-II"}, {"identifier": "C", "content": "A-IV, B-III, C-I, D-II"}, {"identifier": "D", "content": "A-II, B-III, C-I, D-IV"}] | ["C"] | null | <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;border-width:1px;font-family:Arial,... | mcq | jee-main-2023-online-29th-january-evening-shift | 3,196 |
lgo03g3a | chemistry | polymers | classification,-preparations-and-properties-of-polymers | Match <b>List I</b> with <b>List II</b>:<br/><br/>
<style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;width:100%}
.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:bl... | [{"identifier": "A", "content": "(A)-(III), (B)-(I), (C)-(IV), (D)-(II)"}, {"identifier": "B", "content": "(A)-(II), (B)-(III), (C)-(IV), (D)-(I)"}, {"identifier": "C", "content": "(A)-(IV), (B)-(I), (C)-(II), (D)-(III)"}, {"identifier": "D", "content": "(A)-(III), (B)-(IV), (C)-(II), (D)-(I) "}] | ["A"] | null | The correct match between List I (Monomer) and List II (Polymer) is as follows:
<br/><br/>
(A) Tetrafluoroethene → (III) Teflon<br/><br/>
(B) Acrylonitrile → (I) Orlon<br/><br/>
(C) Caprolactam → (IV) Nylon-6<br/><br/>
(D) Isoprene → (II) Natural rubber
<br/><br/>
So, the correct answer is:
<br/><br/>
A-III, B-I, C-IV,... | mcq | jee-main-2023-online-15th-april-morning-shift | 3,197 |
1lgp278cc | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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-III, B-I, C-IV, D-II"}, {"identifier": "B", "content": "A-IV, B-I, C-III, D-II"}, {"identifier": "C", "content": "A-II, B-IV, C-I, D-III"}, {"identifier": "D", "content": "A-IV, B-II, C-III, D-I"}] | ["A"] | null | (A) Weak Intermolecular Forces are present in polymer of 2-chloro, 1, 3-butadiene<br/><br/>
(B) Hydrogen Bonding is present in NYLON-66 which is a polymer of Hexamethylenediamine and adipic acid<br/><br/>
(C) Heavily branched polymer is Bakelite which is polymer of phenol and formaldehyde<br/><br/>
(D) High density pol... | mcq | jee-main-2023-online-13th-april-evening-shift | 3,198 |
1lgq4dln7 | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Match the following</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;border-w... | [{"identifier": "A", "content": "$$\\mathrm{a} \\rightarrow \\mathrm{III}, \\mathrm{b} \\rightarrow \\mathrm{II}, \\mathrm{c} \\rightarrow \\mathrm{I}, \\mathrm{d} \\rightarrow \\mathrm{IV}$$"}, {"identifier": "B", "content": "$$\\mathrm{a} \\rightarrow \\mathrm{II}, \\mathrm{b} \\rightarrow \\mathrm{III}, \\mathrm{c} ... | ["A"] | null | Nylon 6 is a synthetic polymer made from caprolactam, so it corresponds to Column A, option (c), which matches with Column B, option (I).
<br/><br/>
Vulcanized rubber is rubber that has been treated with sulfur or other additives to make it more durable, so it corresponds to Column A, option (b), which matches with Col... | mcq | jee-main-2023-online-13th-april-morning-shift | 3,199 |
1lgrkw6du | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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-II, B-IV, C-I, D-III"}, {"identifier": "B", "content": "A-IV, B-I, C-III, D-II"}, {"identifier": "C", "content": "A-II, B-I, C-IV, D-III"}, {"identifier": "D", "content": "A-IV, B-III, C-I, D-II"}] | ["C"] | null | <p>Let's look at each example in List I and try to identify its type:</p>
<p>A. 2-chloro-1,3-butadiene: This is an example of a synthetic rubber, which is a type of polymer.</p>
<p>B. Nylon 2-nylon 6: This is a type of nylon polymer, which is a type of polyester.</p>
<p>C. Polyacrylonitrile: This is an example of a... | mcq | jee-main-2023-online-12th-april-morning-shift | 3,200 |
1lgsyobzp | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Given below are two statements :</p>
<p>Statement I : Ethene at 333 to $$343 \mathrm{~K}$$ and $$6$$-$$7$$ atm pressure in the presence of $$\mathrm{AlEt}_{3}$$ and $$\mathrm{TiCl}_{4}$$ undergoes addition polymerization to give LDP.</p>
<p>Statement II : Caprolactam at $$533$$-$$543 \mathrm{~K}$$ in $$\mathrm{H}_{2... | [{"identifier": "A", "content": "Both Statement I and Statement II are true"}, {"identifier": "B", "content": "Statement I is true but Statement II is false"}, {"identifier": "C", "content": "Statement I is false but Statement II is true"}, {"identifier": "D", "content": "Both Statement I and Statement II are false"}] | ["C"] | null | <p><b>Statement I is false.</b> Ethene (ethylene) under certain conditions (high pressure, high temperature) in the presence of catalysts does undergo addition polymerization, but it forms polyethylene, not LDP (Low-Density Polyethylene) specifically. The formation of low-density polyethylene (LDPE) vs high-density pol... | mcq | jee-main-2023-online-11th-april-evening-shift | 3,201 |
1lguz063i | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>The polymer $$\mathrm{X}$$ - consists of linear molecules and is closely packed. It is prepared in the presence of triethylaluminium and titanium tetrachloride under low pressure. The polymer $$\mathrm{X}$$ is-</p> | [{"identifier": "A", "content": "High density polythene"}, {"identifier": "B", "content": "Polytetrafluoroethane"}, {"identifier": "C", "content": "Low density polythene"}, {"identifier": "D", "content": "Polyacrylonitrile"}] | ["A"] | null | <p>The polymer X described in the question is synthesized using triethylaluminium and titanium tetrachloride under low pressure. This is a clear indication that the Ziegler-Natta catalyst is used, which is typically employed in the synthesis of high-density polyethylene (HDPE).</p>
<p>High-density polyethylene is made ... | mcq | jee-main-2023-online-11th-april-morning-shift | 3,202 |
1lgvttobo | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <p>Buna-S can be represented as:</p> | [{"identifier": "A", "content": "<img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/1lgx3b208/00c44510-22d7-4f66-9d2b-0b8499c92141/e049f680-e3db-11ed-baaf-253646c1f54e/file-1lgx3b209.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/1lgx3b208/00c44510-22d7-4f66-9d2b-0b8499c92141/e04... | ["A"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lixpntsd/2d7b499f-3249-439b-910f-6b4665353c13/bb0eccc0-0bcb-11ee-acbf-7f9d4e788425/file-6y3zli1lixpntse.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/6y3zli1lixpntsd/2d7b499f-3249-439b-910f-6b4665353c13/bb0eccc0-0bcb-11ee-ac... | mcq | jee-main-2023-online-10th-april-evening-shift | 3,203 |
1lgyhdhmk | chemistry | polymers | classification,-preparations-and-properties-of-polymers | <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)-(II), (B)-(I), (C)-(IV), (D)-(III)"}, {"identifier": "C", "content": "(A)-(II), (B)-(III), (C)-(I), (D)-(IV)"}, {"identifier": "D", "content": "(A)-(IV), (B)-(III), (C)-(I), (D)-(II)"}] | ["C"] | null | <ul>
<li><strong>Nylon-2-Nylon-6</strong> is a biodegradable polymer. It is made from two monomers, hexamethylenediamine and adipic acid. The polymer is strong and durable, but it can also be broken down by bacteria and other microorganisms. This makes it a good choice for use in products that are designed to be biodeg... | mcq | jee-main-2023-online-10th-april-morning-shift | 3,204 |
vhJVbf2rlZLlPeos | chemistry | polymers | uses-of-polymers | Polymer formation from monomers starts by | [{"identifier": "A", "content": "condensation reaction between monomers"}, {"identifier": "B", "content": "coordinate reaction between monomers"}, {"identifier": "C", "content": "conversion of monomer to monomer ions by protons"}, {"identifier": "D", "content": "hydrolysis of monomers"}] | ["A"] | null | Polymerisation starts either by condensation or addition reactions between monomers. Condensation polymers are formed by the combination of monomers with the elimination of simple molecules. Where as the addition polymers are formed by the addition together of the molecules of the monomer or monomers to form a large mo... | mcq | aieee-2002 | 3,205 |
7vtBlxotvksJ3qLS | chemistry | polymers | uses-of-polymers | Nylon threads are made of | [{"identifier": "A", "content": "polyester polymer"}, {"identifier": "B", "content": "polyamide polymer"}, {"identifier": "C", "content": "polyethylene polymer "}, {"identifier": "D", "content": "polyvinyl polymer"}] | ["B"] | null | Nylon is a polyamide polymer.
<picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266664/exam_images/d3ycntzklpgoz605fa9o.webp"><img src="https://res.cloudinary.com/dckxllbjy/image/upload/v1734267707/exam_images/smeyluomr80haotr5bke.webp" style="max-width: 100%;hei... | mcq | aieee-2003 | 3,206 |
vMVc3aRBBP4U9DRt | chemistry | polymers | uses-of-polymers | Which of the following is a polyamide? | [{"identifier": "A", "content": "Teflon"}, {"identifier": "B", "content": "Nylon \u2013 6, 6"}, {"identifier": "C", "content": "Terylene"}, {"identifier": "D", "content": "Bakelite "}] | ["B"] | null | Nylon is a general name for all synthetic fibres forming polyamides. | mcq | aieee-2005 | 3,207 |
amiGoRZdojHHmnxp | chemistry | polymers | uses-of-polymers | Which polymer is used in the manufacture of paints and lacquers? | [{"identifier": "A", "content": "Glyptal"}, {"identifier": "B", "content": "Polypropene"}, {"identifier": "C", "content": "Poly vinyl chloride"}, {"identifier": "D", "content": "Bakelite"}] | ["A"] | null | Glyptal is used in the manufacture of paints and lacquers. | mcq | jee-main-2015-offline | 3,208 |
l6bdUCEYmVkKcIs2 | chemistry | polymers | uses-of-polymers | Which of the following statements about low density polythene is <b>FALSE</b> ? | [{"identifier": "A", "content": "Its synthesis requires high pressure."}, {"identifier": "B", "content": "It is a poor conductor of electricity."}, {"identifier": "C", "content": "Its synthesis requires dioxygen or a peroxide initiator as a catalyst."}, {"identifier": "D", "content": "It is used in the manufacture of b... | ["D"] | null | High density polythene is used in the manufacture of housewares like buckets, dustbins, bottles, pipes etc. Low density polythene is used for insulating electric wires and in the manufacture of flexible pipes, toys. coats, bottles etc. | mcq | jee-main-2016-offline | 3,209 |
P51W5qDE01xXE33Lf01kmitscfs | chemistry | polymers | uses-of-polymers | Which of the following polymer is used in the manufacture of wood laminates? | [{"identifier": "A", "content": "Melamine formaldehyde resin"}, {"identifier": "B", "content": "Urea formaldehyde resin"}, {"identifier": "C", "content": "cis-poly isoprene"}, {"identifier": "D", "content": "Phenol and formaldehyde resin"}] | ["B"] | null | Urea-formaldehyde resin is used in wood laminates. | mcq | jee-main-2021-online-16th-march-evening-shift | 3,210 |
1l59rpb50 | chemistry | polymers | uses-of-polymers | <p>The Novolac polymer has mass of 963 g. The number of monomer units present in it are</p> | [] | null | 9 | Novolac is<br><br>
<img src="https://app-content.cdn.examgoal.net/fly/@width/image/1l9xp0php/41e1d148-d2b6-4d17-8d07-cf71e25f04a7/45b81bd0-599b-11ed-bd2e-23af43dbf0d2/file-1l9xp0phq.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/1l9xp0php/41e1d148-d2b6-4d17-8d07-cf71e25f04a7/45b81bd0-599b-11ed-b... | integer | jee-main-2022-online-25th-june-evening-shift | 3,212 |
1ldu0ix5b | chemistry | polymers | uses-of-polymers | <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-III, B-I, C-IV, D-II"}, {"identifier": "B", "content": "A-III, B-IV, C-I, D-II"}, {"identifier": "C", "content": "A-III, B-II, C-IV, D-I"}, {"identifier": "D", "content": "A-III, B-IV, C-II, D-I"}] | ["D"] | null | (A) Glyptal - (III) Paints and Lacquers
<br/><br/>
(B) Neoprene - (IV) Gaskets
<br/><br/>
(C) Acrilan - (II) Synthetic wool
<br/><br/>
(D) LDP - (I) Flexible pipes
| mcq | jee-main-2023-online-25th-january-evening-shift | 3,214 |
1lh27c4zz | chemistry | polymers | uses-of-polymers | <p>Polymer used in orlon is :</p> | [{"identifier": "A", "content": "Polyethene"}, {"identifier": "B", "content": "Polyacrylonitrile"}, {"identifier": "C", "content": "Polycarbonate"}, {"identifier": "D", "content": "Polyamide"}] | ["B"] | null | <img src="https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1llm75dpr/0c4151c2-d806-42d5-bc45-48002ba2c9e1/5cbf23f0-40db-11ee-bd5e-2b8611743c66/file-6y3zli1llm75dps.png?format=png" data-orsrc="https://app-content.cdn.examgoal.net/image/6y3zli1llm75dpr/0c4151c2-d806-42d5-bc45-48002ba2c9e1/5cbf23f0-40db-11ee-bd... | mcq | jee-main-2023-online-6th-april-morning-shift | 3,215 |
vWJP5CEhPwDZ6pFu | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | The compound formed in the positive test for nitrogen with the Lassaigne solution of an
organic compound is | [{"identifier": "A", "content": "Fe<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub> "}, {"identifier": "B", "content": "Na<sub>4</sub>[Fe(CN)<sub>5</sub>NOS] "}, {"identifier": "C", "content": "Fe(CN)<sub>3</sub>"}, {"identifier": "D", "content": "Na<sub>3</sub>[Fe(CN)<sub>6</sub>] "}] | ["A"] | null | If nitrogen is present in organic compound, then sodium extract contains NaCN.
<br><br>Na + C + N $$\buildrel {Fuse} \over
\longrightarrow $$ NaCN
<br><br>FeSO<sub>4</sub> + 6NaCN $$ \to $$ Na<sub>4</sub>[Fe(CN)<sub>6</sub>] + Na<sub>2</sub>SO<sub>4</sub>
<br><br>Na<sub>4</sub>[Fe(CN)<sub>6</sub>] changes to prussian ... | mcq | aieee-2004 | 3,216 |
4e0uOE2k00zUIZ3eVaKLW | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | The correct match between Item-I and Item-II is :
<br/><br/><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;border:none;}
.tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;}
.tg th{font-family:Arial, sans-s... | [{"identifier": "A", "content": "A $$ \\to $$ R; B $$ \\to $$ P; C $$ \\to $$ S; D $$ \\to $$ Q"}, {"identifier": "B", "content": "A $$ \\to $$ Q; B $$ \\to $$ S; C $$ \\to $$ P; D&nbs... | ["C"] | null | (1) To react with FeCl<sub>3</sub>, with benzene ring there should be a $$-$$OH group attached.
<br><br>(2) For carbylamine test there should be $$-$$NH<sub>2</sub> group in a compound.
<br><br>(3) NaHCO<sub>3</sub> reacts when there is $$-$$COOH group in a compound.
<br><br>(4)&nbs... | mcq | jee-main-2019-online-9th-january-morning-slot | 3,218 |
UaHsITv2yOJsiIh7UHnwU | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | The organic compound that gives following
qualitative analysis is :<br/><br/>
<style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;width:100%}
.tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;... | [{"identifier": "A", "content": "<img src=\"https://res.cloudinary.com/dckxllbjy/image/upload/v1734264449/exam_images/a2zzdsre2adpavezll4s.webp\" style=\"max-width: 100%; height: auto;display: block;margin: 0 auto;\" loading=\"lazy\" alt=\"JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Practical Organic Che... | ["A"] | null | <picture><source media="(max-width: 320px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266423/exam_images/lgpxjvdwbyv3c8jdufgh.webp"><source media="(max-width: 500px)" srcset="https://res.cloudinary.com/dckxllbjy/image/upload/v1734266328/exam_images/z4opzh3wu8whchv8gnjo.webp"><source media="(max-wid... | mcq | jee-main-2019-online-9th-april-morning-slot | 3,220 |
O8ENJyXKVDcOCmuJPqjgy2xukey8w164 | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | If you spill a chemical toilet cleaning liquid on
your hand, your first aid would be | [{"identifier": "A", "content": "aqueous NaOH"}, {"identifier": "B", "content": "aqueous NaHCO<sub>3</sub>"}, {"identifier": "C", "content": "aqueous NH<sub>3</sub>"}, {"identifier": "D", "content": "vinegar"}] | ["B"] | null | Toilet cleaning liquid has about 10.5% w/v HCl ; to neutralise its affect aqueous NaHCO<sub>3</sub> is used while
NaOH is avoided for this purpose because of its highly corosive in nature and can burn body.
| mcq | jee-main-2020-online-2nd-september-evening-slot | 3,222 |
eJAPTCE9w0uar3r1Yi1kltbrhig | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens? | [{"identifier": "A", "content": "Nitric acid"}, {"identifier": "B", "content": "Sodium hydroxide"}, {"identifier": "C", "content": "Ammonia"}, {"identifier": "D", "content": "Hydrochloric acid"}] | ["A"] | null | NaCN + HNO<sub>3</sub> $$ \to $$ NaNO<sub>3</sub> + HCN $$ \uparrow $$<br><br>
Na<sub>2</sub>S + HNO<sub>3</sub> $$ \to $$ NaNO<sub>3</sub> + H<sub>2</sub>S $$ \uparrow $$<br><br>
Nilnic acid decomposed NaCN & Na2S, else they precipitate in test & misquite the resolve
For testing of halogens, Nitric acid is add... | mcq | jee-main-2021-online-25th-february-evening-slot | 3,223 |
oi6jDGS4mmZ38RLMZ61klusopw1 | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively. | [{"identifier": "A", "content": "ketoses, proteins"}, {"identifier": "B", "content": "proteins, ketoses"}, {"identifier": "C", "content": "aldoses, ketoses"}, {"identifier": "D", "content": "ketoses, aldoses"}] | ["A"] | null | Seliwanoff test and Xanthaproteic test are used for identification of 'Ketoses' and proteins
respectively. | mcq | jee-main-2021-online-26th-february-evening-slot | 3,225 |
1krt6kvtu | chemistry | practical-organic-chemistry | chemistry-involved-in-the-preparation-of-organic-and-inorganic-compounds | Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene __________. (Nearest integer) | [] | null | 78 | $${C_6}{H_6} + C{H_3}Cl\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{}} {C_6}{H_5}C{H_3} + HCl$$<br><br>10 gm of C<sub>6</sub>H<sub>6</sub> = $${{10} \over {78}}$$ mole
<br><br>Moles of methylbenzene should be obtained = $${{10} \over {78}}$$ mole
<br><br>= $$\left( {{{10} \over {78}} \times 92} \right)gm $$<br... | integer | jee-main-2021-online-22th-july-evening-shift | 3,227 |
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