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49. The heats of combustion of C and CO are -393.5 and $-283.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively. The heat of formation (in kJ ) of CO per mode is
(a) 676.5
(b) -676.5
(c) -110.5
(d) 110.5
(IIT 2016 Main) | 1 |
Can anyone clear upsc civil services exam with 6 months of preparation? | 0 |
What are full body hair removal by laser costs in india? | 0 |
22. Decrease in atomic number is observed during
(a) alpha emission
(b) beta emission
(c) positron emission
(d) electron capture. | 1 |
59. Four combinations of two thin lenses are given in Column-I. The radius of curvature of all curved surfaces is $r$ and the refractive index of all the lenses is 1.5 . Match lens combinations in Column-I with their focal length in Column-II and select the correct answer using the code given below the lists.
| Column... | 1 |
16. The function $\frac{\sin (x+a)}{\sin (x+b)}$ has no maxima or minima if
$$
\begin{array}{ll}
\text { a. } b-a=n \pi, n \in I & \text { b. } b-a=(2 n+1) \pi, n \in I \\
\text { c. } b-a=2 n \pi, n \in I & \text { d. None of these }
\end{array}
$$ | 1 |
24. 500 mL of a $0 \cdot 1 \mathrm{~N}$ solution of $\mathrm{AgNO}_{3}$ is added to 500 mL of a $0 \cdot 1 \mathrm{~N} \mathrm{KCl}$ solution. The concentration of nitrate in the resulting mixture is
(a) 0.1 N
(b) 0.05 N
(c) 0.01 N
(d) 0.2 N | 1 |
How do I boot Linux Mint on VirtualBox? | 0 |
When was the start of the period known as the Renaissance? | 0 |
46. The area of the triangle formed by the tangent and the normal to the parabola $y^{2}=4 a x$, both drawn at the same end of the latus rectum, and the axis of the parabola is
a. $2 \sqrt{2} a^{2}$
b. $2 a^{2}$
c. $4 a^{2}$
d. none of these | 1 |
Why do soccer clubs not retire jersey numbers? | 0 |
1. perimeter of $\triangle O C S_{1}$ is
a. 20 units
b. 10 units c. 15 units
d. 25 units | 1 |
33.
$\begin{array}{cccc}\text { a. } 9 & \text { b. } 13 & \text { c. } 4 & \text { d. } 5 \\ \text { 33. A tangent having slope of }-\frac{4}{3} \text { to the ellipse } \frac{x^{2}}{18}+\frac{y^{2}}{32}=\end{array}$ 1 intersects the major and minor axes at points $A$ and $B$ respectively. If $C$ is the centre of the... | 1 |
Do you feel guilty about downloading movies from torrent? | 0 |
Why do I have joint pain? | 0 |
What should India do to get Pakistan back? | 0 |
9. When a solid sphere moves through a liquid, the liquid opposes the motion with a force F. The magnitude of F depends on the coefficient of viscosity η of the liquid, the radius r of the sphere and the speed v of the sphere. ... | 1 |
Ex. 26. 4 g of NaOH was dissolved in one litre of a solution containing one mole of acetic acid and one mole of sodium acetate. Find the pH of the resulting solution. The dissociation constant for acetic acid is $1.8 \times 10^{-5}$. | 1 |
106. A purse contains 2 six-sided dice. One is a normal fair die, while the other has two 1's, two 3's, and two 5's. A die is picked up and rolled. Because of some secret magnetic attraction of the unfair die, there is $75 \%$ chance of picking the unfaidie and a $25 \%$ chance of picking a fair die. The die is rolled ... | 1 |
Example 2.11 Find the ordered pair $(x, y)$ for which $x^{2}-y^{2}-i(2 x+y)=2 i$ | 1 |
Is fighting in wwe real or fake? | 0 |
What are some facts about sleeping? | 0 |
Are charter schools better than public schools? Why or why not? | 0 |
What emotions did Cooley regard as of paramount social importance? | 0 |
8. The most polar compound among the following is :
(a)
(b)
 will be best represented by
(a)
 $1+\frac{P b}{R T}$
(b) $\frac{P b}{R T}$
(c) $1-\frac{P b}{R T}$
(d) $1-\frac{b}{(V R T)}$ | 1 |
Is multiple sclerosis genetic? | 0 |
$\bullet 44$ Figure 23-52 gives the magnitude of the electric field inside and outside a sphere with a positive charge distributed uniformly throughout its volume. The scale of the vertical axis is set by $E_{s}=5.0 \times 10^{7} \mathrm{~N} / \mathrm{C}$. What is the charge on the sphere?
 If Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.
(b) If Statement I is true, Statement II is true; Statement II is not a correct explanation for Statement I.
(c) If Statement I is true; Statement II is false.
(d) If Statement I is false; ... | 1 |
67. Ejection of the photoelectron from metal in the photoelectric effect experiment can be stopped by applying 0.5 V when the radiation of 250 nm is used. The work function of the metal is ... .
(a) 4.5 eV
(b) 5 eV
(c) 5.5 eV
(d) 4 eV
[Hint: $1 \mathrm{eV}=1.602 \times 10^{-19} \mathrm{~J}$, energy to slop $\mathrm{PEE... | 1 |
Ex. 2. From the values of 1 faraday and Avogadro constant, show that 1 faraday may be called 1 mole of electricity. | 1 |
6. Total number of geometrical isomers possible for given compounds are:
$$
\mathrm{Me}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}
$$
(A) 16
(B) 8
(C) 4
(D) 2 | 1 |
What did the Scientific Revolution force people to do? | 0 |
48. The arrangement of $X^{-}$ions around $A^{+}$ion in solid $A X$ is given in the figure (not drawn to scale). If the radius of $X^{-}$is 250 pm , the radius of $A^{+}$is
(a) 104 pm
(b) 125... | 1 |
8. A stationary hydrogen atom emits photon corresponding to the first line of Lyman series. If $R$ is the Rydberg constant and $M$ is the mass of the atom, then the velocity acquired by the atom is
(a) $\frac{3 R h}{4 M}$
(b) $\frac{4 M}{3 R h}$
(c) $\frac{R h}{4 M}$
(d) $\frac{4 M}{R h}$ | 1 |
How is cladistics similar to the stemmatic method? | 0 |
1.312. Find the elastic deformation energy of a steel rod whose one end is fixed and the other is twisted through an angle $p=6.0^{\circ}$. The length of the rod is equal to $l=1.0 \mathrm{~m}$, and the radius to $r=$ $=10 \mathrm{~mm}$. | 1 |
23. Unit vector parallel to the resultant of vectors $\mathbf{A}=4 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}$ and $\mathbf{B}=8 \hat{\mathbf{i}}+8 \hat{\mathbf{j}}$ will be
(a) $\frac{24 \hat{\mathbf{i}}+5 \hat{\mathbf{j}}}{13}$
(b) $\frac{12 \hat{\mathbf{i}}+5 \hat{\mathbf{j}}}{13}$
(c) $\frac{6 \hat{\mathbf{i}}+5 \hat{\mat... | 1 |
55. If $A$ and $B$ are acute positive angles satisfying the equations $3 \sin ^{2} A+2 \sin ^{2} B=1$ and $3 \sin 2 A-2 \sin 2 B=0$, then $A+2 B$ is equal to
a. $\pi$
b. $\frac{\pi}{2}$
c. $\frac{\pi}{4}$
d $\frac{\pi}{6}$ | 1 |
Is geographic SEO on a one page website possible? | 0 |
6. Switch $S$ is closed at time $t=0$. Which one of the following statements is correct?
(a) Current in the resistance $R$ increases if $E_{1} r_{2}<E_{2}\left(R+r_{1}\right)$
(b) Current ... | 1 |
Why is Pakistan not willing to act against terrorism? | 0 |
3. Range of $f(x)=[R(x)] /\left(x^{2}-3 x+2\right)$ is
a. $[-2,2]$
b. $(-\infty,-2-\sqrt{3}] \cup[-2+\sqrt{3}, \infty)$
c. $(-\infty,-7-4 \sqrt{3}] \cup[-7+4 \sqrt{3}, \infty)$
d. none of these | 1 |
3. The rate law of the reaction $\mathrm{A}+2 \mathrm{~B} \rightarrow$ Product is given by $\frac{d \text { (product) }}{d t}=k[\mathrm{~A}]^{2} \cdot[\mathrm{~B}]$. If A is taken in large excess, the order of the reaction will be
(a) 0
(b) 1
(c) 2
(d) 3 | 1 |
Is it morally right for an unhappy person to have children? | 0 |
How can you determine the combustion of methane? | 0 |
What are some of the responsibilities of a US citizenship compared to a French citizenship? | 0 |
When did practicers of religious humanism form under the name Humanism? | 0 |
How do we know that no two people have the same fingerprints? | 0 |
What is the Tokugawa period also known as? | 0 |
What were the Saka Rulers of Western India believed to be called? | 0 |
Is keeping a piece of skin shed by a cobra considered lucky in India? | 0 |
Is it worth subscribing to Amazon Kindle Unlimited in India? | 0 |
What government official is responsible for nominating two members to the New Delhi Municipal Council? | 0 |
How do I become popular on Instagram? | 0 |
4.3 The decomposition of $\mathrm{NH}_3$ on platinum surface is zero order reaction. What are the rates of production of $\mathrm{N}_2$ and $\mathrm{H}_2$ if $k=2.5 \times 10^{-4} \mathrm{~mol}^{-1} \mathrm{~L} \mathrm{~s}^{-1}$ ? | 1 |
38. If glycerene, $\mathrm{C}_{3} \mathrm{H}_{5}(\mathrm{OH})_{3}$, and methyl alcohol, $\mathrm{CH}_{3} \mathrm{OH}$, are sold at the same price per kg , which would be cheaper for preparing an antifreeze solution for the radiator of an automobile?
$\left(\mathrm{CH}_{3} \mathrm{OH}\right)$ | 1 |
44. The graph of the quantity $\mathrm{d} / \mathrm{p}$ against pressure is extrapolated to zero pressure to obtain a limiting value. If this limiting $\mathrm{d} / \mathrm{p}$ value for a certain nonideal gas is found to be $2.86 \mathrm{~g} / \mathrm{L}-\mathrm{atm}$ at $0^{\circ} \mathrm{C}$, the molar mass of the g... | 1 |
1.15 Match the following prefixes with their multiples:
| . | Prefixes | Multiples |
|-------|-----------|-----------|
| (i) | micro | $10^6$ |
| (ii) | deca | $10^9$ |
| (iii) | mega | $10^{-6}$ |
| (iv) | giga | $10^{-15}$ |
| (v) | femto | 10 | | 1 |
5. If $\left|z_{1}\right|=15$ and $\left|z_{2}-3-4 i\right|=5$, then
a. $\left|z_{1}-z_{2}\right|_{\text {min }}=5$
b. $\left|z_{1}-z_{2}\right|_{\text {min }}=10$
c. $\mid z_{1}-z_{2} I_{\text {max }}=20$
d. $\left|z_{1}-z_{2}\right|_{\max }=25$ | 1 |
| 5 |  | | | | | | 1 |
13. A horizontal disc rotates freely with angular velocity $\omega$ about a vertical axes through its centre. A ring, having the same mass and radius as the disc, is now gently placed coaxially on the disc. After some time, the two rotate with a common angular velocity. Then
(a) no friction exists between the disc and... | 1 |
The western colonies were invaded by whom during World War II? | 0 |
4. If $\mathrm{A}_{1}, \mathrm{~A}_{3}, \ldots, \mathrm{A}_{2 \mathrm{n}-1}$ are n skew-symmetric matrices of same order, then $\mathrm{X}=\sum_{\mathrm{r}=1}^{\mathrm{n}}(2 \mathrm{r}-1)\left(\mathrm{A}_{2 \mathrm{r}-1}\right)^{2 \mathrm{r}-1}$ will be
(a) symmetric
(b) skew-symmetric
(c) neither symmetric nor skew sy... | 1 |
How can I improve writing skills? | 0 |
10. The $\mathrm{pH}$ of rain water, is approximately:
(a) 5.6
(b) 7.5
(c) 7.0
(d) 6.5 | 1 |
9. Water from a tap emerges vertically downwards with an initial speed of $1.0 \mathrm{~m} / \mathrm{s}$. The cross-sectional area of tap is $10^{-4} \mathrm{~m}^{2}$. Assume that the pressure is constant throughout the steam of water and that the flow is steady, the cross-sectional area of stream $0.15 \mathrm{~m}$ be... | 1 |
2. The function $f(x)=\frac{4-x^{2}}{4 x-x^{3}}$ is
a. Discontinuous at only one point
b. Discontinuous exactly at two points
c. Discontinuous exactly at three points
d. None of these | 1 |
59 o Figure 40-24 shows the energy levels of two types of atoms. Atoms $A$ are in one tube, and atoms $B$ are in another tube. The energies (relative to a ground-state energy of zero) are indicated; the average lifetime of atoms in each level is also indicated. All the atoms are initially pumped to levels higher than t... | 1 |
How much did an ounce of weed cost in 1970? | 0 |
16 Aluminium trifluoride is insoluble in anhydrous HF but dissolves on addition of NaF . Aluminium trifluoride precipitates out of the resulting solution when gaseous $\mathrm{BF}_3$ is bubbled through. Give reasons. | 1 |
3. If $p$ is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength $\lambda$, then for $1.5 p$ momentum of the photoelectron, the wavelength of the light should be:
(Assume kinetic energy of ejected photoelectron to be very high in comparison to work functio... | 1 |
What type of heritage architecture is mainly displayed in Hyderabad? | 0 |
3. Let $y=y(x)$ be the solution of the differential equation, $\frac{d y}{d x}+y \tan x=2 x+x^{2} \tan x, \quad x \in-\frac{\pi}{2}, \frac{\pi}{2}$, such that $y(0)=1$. Then
(a) $y^{\prime} \frac{\pi}{4}-y^{\prime}-\frac{\pi}{4}=\pi-\sqrt{2}$ (b)
$y^{\prime} \frac{\pi}{4}+y^{\prime}-\frac{\pi}{4}=-\sqrt{2}$
(c) $y ... | 1 |
14. Consider a thin square sheet of side $L$ and thickness $t$, made of a material of resistivity $\rho$. The resistance between two opposite faces, shown by the shaded areas in the figure is
 $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$
(b) $\left(\mathrm{HPO}_{3}\right)_{3}$
(c) $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}$
(d) $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}$ | 1 |
How does Trump election relate to Mexican peso value? | 0 |
When did the rule of Constantine end? | 0 |
How can u get along with an unfaithful man? | 0 |
1. An ellipse, with foci at $(0,2)$ and $(0,-2)$ and minor axis of length 4, passes through which of the following points?
(a) $(\sqrt{2}, 2)$
(b) $(2, \sqrt{2})$
(c) $(2,2 \sqrt{2})$
(d) $(1,2 \sqrt{2})$ | 1 |
13. For $0 \leq x \leq 2 \pi$, then $2^{\operatorname{cosec} x} \sqrt{\frac{1}{2} y^{2}-y+1} \leq \sqrt{2}$
a. is satisfied by exactly one value of $y$
$\mathbf{h}$ is satisfied by exactly two value of $x$
c. is satisfied by $x$ for which $\cos x=0$
d is satisfied by $x$ for which $\sin x=0$ | 1 |
Which job only requires paperwork for engineers? | 0 |
18. The middle term in the expansion of $(x / 2+2)^{8}$ is 1120 ; then $x \in R$ is equal to
a. -2
b. 3
c. -3
d. 2 | 1 |
What was another name used for the corrupted high culture of the indigenous people? | 0 |
24. An open knife of mass $m$ is dropped from a height $h$ on a wooden floor. If the blade penetrates up to the depth $d$ into the wood, the average resistance offered by the wood to the knife edge is
(a) $m g\left(1+\frac{h}{d}\right)$
(b) $m g\left(1+\frac{h}{d}\right)^2$
(c) $m g\left(1-\frac{h}{d}\right)$
(d) ... | 1 |
Ex. 2. 20 mL of CO was mixed with 50 mL of oxygen and the mixture was exploded. On cooling, the resulting mixture was shaken with KOH. Find the volume of the gas that is left. | 1 |
79 SSM A diffraction grating has resolving power $R=\lambda_{\mathrm{avg}} / \Delta \lambda=$ $N m$. (a) Show that the corresponding frequency range $\Delta f$ that can just be resolved is given by $\Delta f=c / N m \lambda$. (b) From Fig. 36-22, show that the times required for light to travel along the ray at the bot... | 1 |
How do I start my career in Machine Learning? | 0 |
26. The last two digits of the number $3^{400}$ are
a. 81
b. 43
c. 29
d. 01 | 1 |
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Why did God create the universe? | 0 |
8. A ball is thrown horizontally from a height with a certain velocity at time $t=0$. The ball bounces repeatedly from the ground with coefficient of restitution less than 1 as shown. Neglecting air resistance and taking the upward direction as positive, which figure qualitatively depits the vertical component of the b... | 1 |
What would happen if we no longer segregated our public bathrooms by gender? | 0 |
What are the principles with which you live your life and base your decisions? | 0 |
9. Statement 1: $f(x)=\sin x+[x]$ is discontinuous at $x=0$, where $[$.$] denotes the greatest integer function.$
Statement 2: If $g(x)$ is continuous and $h(x)$ is discontinuous at $x=a$, then $g(x)+h(x)$ will necessarily be discontinuous at $x=a$. | 1 |
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