Consider the following reaction:

The product 'A' is:

1. $C_6{H}_{5}OH$

2. $C_6{H}_{5}COC{H}_3$

3. $C_6{H}_{5}Cl$

4. $C_6{H}_{5}CHO$

Find the reagent that can be used to distinguish between 1-butyne and 2-butyne.

1.  Hydrochloric acid (HCl)
2.  Oxygen (O₂)
3.  Bromine (Br₂)
4.  Sodium amide (NaNH₂)${\mathrm{}}_{}$

For real gases van der Waals equation is written as

$(P+\frac{a{n}^2}{V^2})$ $(V-nb)$ $=$ $nRT$

where 'a' and 'b' are van der Waals constants.

Two sets of gases are:
(I) $O_2,$ $C{O}_2$ $,$ $H_2$ $and$ $He$        (II)$C{H}_4,$ $O_2$ $$ $and$ $H_2$ 
The gases given in set-I are in increasing order of 'b' and gases given in set-II are in decreasing order of 'a'. Select the correct order from the following:

1. $($ $I)O_2<He<H_2<C{O}_2(II)$ $H_2>O_2>C{H}_4$

2. $($ $I)H_2<He<O_2<C{O}_2(II)$ $C{H}_4>O_2>H_2$

3. $($ $I)H_2<O_2<He<C{O}_2(II)$ $O_2>C{H}_4>H_2$

4. $($ $I)He<H_2<C{O}_2<$ $$ $O_2\left(II\right)$ $C{H}_4>H_2>O_2$

Activation energy $E_a$ and rate constant (k₁ and k₂) of a chemical reaction at two different temperatures (T₁ and T₂) are related by:

Which of the following exhibits only a +3 oxidation state?

Equal volumes of two monoatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats (Cp/Cv) of the mixture will be:

Structure of a mixed oxide is cubic close-packed (CCP). The cubic unit cell of mixed oxide is composed of oxide ions. One-fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is:

1. A₂BO₂
2. A₂B₃O₄
3. AB₂O₂
4. ABO₂

Four successive members of the first series of the transition metals are listed below. For which one of them does the standard potential $\left(E{°}_{M^{2+}/M}\right)$ value have a positive sign?
1.  Ni (Z = 28)
2.  Cu (Z = 29)
3.  Fe (Z = 26)
4.  Co (Z = 27)

In replacement reaction 

The reaction will be most favorable if M happens to be:

1.  K
2.  Rb
3.  Li
4.  Na

An organic compound ($C_3{H}_{9}N$) (A), when treated with nitrous acid, gave an alcohol, and N₂ gas was evolved. (A) on warming with CHCl₃ and caustic potash gave (C) which on reduction gave isopropylmethylamine. The structure of (A) is:

1.		2.
3.		4.