Which one of the following compounds is not found in the 'catalytic cracking' of octane?

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

Which hydrogen in compound $\left(E\right)$ is easily replaceable during bromination reaction in presence of light ?

The total number of monohalogenated organic products in the following (including stereoisomers) reaction is

$$\begin{gathered} \underset{(\mathrm{Simplest} \mathrm{optically} \\ \mathrm{active} \mathrm{alkene})}{\mathrm{A}} \underset{\left(\mathrm{ii}\right) {\mathrm{X}}_2/∆}{\overset{\left(\mathrm{i}\right) {\mathrm{H}}_2/\mathrm{Ni}/∆}{\to }} \end{gathered}$$

Which of the following is a free radical substitution reaction?

Identify the decreasing order of boiling point of alkanes

(i) $\mathrm{n}$-pentane

(ii) Isopentane

(iii) Neopentane