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Consider the reaction

$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$

The equilibrium constant of the above reaction is $K_p.$ If pure ammonia is left to dissociate, the partial pressure of ammonia at equilibrium is given by: (Assume that ) $P_{N{H}_3}<<P_{total}$ at equilibrium)

The reactivity of ethyl chloride is

[KCET 1986]

In the following questions two Statement - 1 (Assertion) and Statement - 2 (Reason) are provided. Each question has 4 choices (a), (b), (c) and (d) for its answer, out of which ONLY ONE is correct. Mark your responses from the following options:

Statement - 1 : The transition of electrons $n_3\to n_2$ in H - atom will emit radiation of higher frequency than $n_4\to n_3$.

Statement - 2 : Principal shells $n_2$ $n_3$ have lower energy than $n_4$.

What is the wavelength of x-ray, if the interplanar distance of the crystal is 286 pm and the incident angle is ${15.8}^o$. Order of reflection is 2.

Identify the product Y in the following reaction sequence

Ethyl alcohol is industrially prepared from ethylene by

Among the following, choose the compounds that can react with $PC{l}_5$ to give $POC{l}_3$.

In which of the following alkenes the addition of $HBr$ is easiest?

A proton, a deuteron (nucleus of $1_H^2)$ and an $\alpha$-particle with same kinetic energy enter a region of uniform
magnetic field moving at right angles to the field. The ratio of the radii of their circular path is

The order of reaction $A\to \text{Product}$ can be given by the expression,

[Where r = rate of reaction;

$[A{]}_1=\text{Concentration at time}{t}_1;[A{]}_2=\text{Concentration at time}{t}_2$

Benzoic acid undergoes dimerization in benzene solution.

Then, the van't Hoff factor $\left(i\right)$ is related to the degree of association of the acid $\left(\alpha \right)$ as :

Which of the following compounds has the smallest bond angle?

In silicon dioxide

Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following splitting patterns? (relative orbital energies not on scale).

QUESTION 14.14

What type fo bonding helps in stabilising the $\alpha$ - helix structure fo proteins?

What is the catalyst 'y' used in the water gas shift reaction?

Reaction 1: $C\left(redhotcoke\right)+H_{2}O\left(g\right)\stackrel{1273K}{⟶}CO\left(g\right)+H_2\left(g\right)$

Reaction 2: $CO\left(g\right)+H_2\left(g\right)+H_{2}O\left(g\right)\stackrel{y\left(catalyst\right)}{⟶}C{O}_2\left(g\right)+2H_2\left(g\right)$

Which of the following compound will most readily give a cyclic product when treated with a base ?

Name the common
elements present in the anode mud in electrolytic refining

of copper. Why are they
so present ?

In a fuel cell, methanol is used as a fuel and $O_2$ is used as an oxidizer. The standard enthalpy of combustion of methanol is $-726{\text{kJmol}}^{-1}$. The standard free energies of formation of $C{H}_{3}OH\left(l\right)$, $C{O}_2\left(g\right)$ and $H_{2}O\left(l\right)$ are − 166.3, −394.4 and $-237.1{\text{kJmol}}^{-1}$ respectively. The efficiency of the fuel cell will be:

Lindemann proposed the following detailed mechanism for gas phase isomerization, the reaction is



In the above scheme, $A^{\ast }$ is a molecule that has enough vibrational energy to decompose or isomerise. The Lindemann mechanism is followed by most of gas phase decomposition or isomerization reaction.

For the overall unimolecular isomerization of cyclopropane to propylene at , the values of versus concentration is as follows.

$\underset{K_{unit}}{\left|M\right|}\underset{\frac{1}{137.5}}{\left|1M\right|}\underset{\frac{1}{131.25}{\text{in s}}^{-1}}{\left|2M\right|}$



If with the increase in temperature the overall rate increases, then the correct representation at a very high concentration of M is

Among the following, the Newman projections of meso-2,3-butanediol is/are:

Which
of the following lattices has the highest packing efficiency (i)
simple cubic (ii) body-centred cubic and (iii) hexagonal close-packed
lattice?

The correct order of N-compounds in its decreasing order of oxidation states is

The packing efficiency of the face centered cubic (fcc), body centered cubic (bcc) and simple primitive cubic (sc) lattices follows the order :

Which of the following chemicals can be added for sweetening of food items at cooking temperature and does not provide calories?
(a) Sucrose
(b) Glucose
(c) Aspartame
(d) Sucralose