Q. Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure.
The correct order of their boiling point is:

1. $I>II>III$
2. $III>II>I$
3. $II>III>I$
4. $III>I>II$

Q. Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is:

1. $0$
2. $1$
3. $2$
4. $3$

Q. The major product in the following reaction is:

Q. The product formed in the reaction of $SOC{l}_2$ with white phosphorous is:

1. $PC{l}_3$
2. $S{O}_{2}C{l}_2$
3. $SC{l}_2$
4. $POC{l}_3$

Q. Assuming $(2s-2p)$ mixing is not operative, the paramagnetic species among the following is :

1. $B{e}_2$
2. $B_2$
3. $C_2$
4. $N_2$

Q. The acidic hydrolysis of ether (X) shown above is fastest when:

1. one phenyl group is replaced by a methyl group.
2. one phenyl group is replaced by a para-methoxyphenyl group.
3. two phenyl groups is replaced by two para-methoxyphenyl groups.
4. no structural change is made to X.

Q. For the process $H_{2}O\left(l\right)\to H_{2}O\left(g\right)$, at $T={100}^{\circ }$C and 1 atmosphere pressure, the correct choice is:

1. $\Delta S_{system}>0$ and $\Delta S_{surrounding}>0$
2. $\Delta S_{system}>0$ and $\Delta S_{surrounding}<0$
3. $\Delta S_{system}<0$ and $\Delta S_{surrounding}>0$
4. $\Delta S_{system}<0$ and $\Delta S_{surrounding}<0$

Q. Hydrogen peroxide in its reaction with $KI{O}_4$ and $N{H}_{2}OH$ respectively is acting as:

1. reducing agent, oxidising agent
2. reducing agent, reducing agent
3. oxidising agent, reducing agent
4. oxidising agent, oxidising agent

Q. For the identification of $\beta$-naphthol using dye test, it is necessary to use:

1. dichloromethane solution of $\beta$-naphthol
2. acidic solution of $\beta$-naphthol
3. neutral solution of $\beta$-naphthol
4. alkaline solution of $\beta$ -naphthol

Q. The value of d in cm (shown in the figure), as estimated from Graham's law is:

1. 8
2. 12
3. 16
4. 20

Q. For the elementary reaction $M\to N$, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is:

1. 3
2. 4
3. 2
4. 1