Total number of isomers (including stereoisomers) obtain on monochlorination of methylcyclohexane is

Match List-I with List-II

Match List-I with List-II.

Choose the correct answer from the options given below

Given below are two statements: One is labelled as Assertion $\mathrm{A}$ and the other is labelled as Reason $\mathrm{R}$

Assertion $\mathrm{A}$ : Thin layer chromatography is an adsorption chromatography.

Reason $\mathrm{R}$ : A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent. In the light of the above statements, choose the correct answer from the options given below

A sample of $0.125 \mathrm{g}$ of an organic compound when analysed by Duma's method yields $22.78 \mathrm{mL}$ of nitrogen gas collected over $\mathrm{KOH}$ solution at $280 \mathrm{K}$ and $759\mathrm{mmHg}$. The percentage of nitrogen in the given organic compound is____

(a) The vapour pressure of water at $280 \mathrm{K}$ is $14.2\mathrm{mmHg}$

(b) $\mathrm{R}=0.082 \mathrm{L} \mathrm{atm} {\mathrm{K}}^{-1}{ \mathrm{mol}}^{-1}$

Increasing order of stability of the resonance structure is: