$A$ mixture of propene and methane is obtained by the cracking of

The number of possible structural isomers for a compound with the molecular formula $C_7H_{16}$ is

At room temperature,solid paraffin is:

The relative reactivity of $1^o H$,$2^o H$,and $3^o H$ in bromination reaction has been found to be $1 : 82 : 1600$ respectively. In the reaction $CH_3-CH(CH_3)-CH_3 \text{ (excess)} + Br_2$ $\xrightarrow{hv} CH_3-C(Br)(CH_3)-CH_3 \text{ (A)} + CH_3-CH(CH_3)-CH_2-Br \text{ (B)}$,the percentage yields of the products $(A)$ and $(B)$ are expected to be:

Which isomer of hexane gives only two monochlorinated products?

The maximum number of isomeric monochloro derivatives which can be obtained from $2,2,5,5-$tetramethylhexane by chlorination is $..............$.