On cracking petrol,we get

The product $(A)$ of the above reaction is:

In the bromination of isobutane,the relative reactivity rates of $1^oH, 2^oH,$ and $3^oH$ are $1 : 82 : 1600$ respectively. Calculate the percentage yield of products $(a)$ and $(b)$ in the following reaction:
$CH_3-CH(CH_3)-CH_3 (excess) + Br_2 \xrightarrow{hv} (a) CH_3-C(Br)(CH_3)-CH_3 + (b) CH_3-CH(CH_3)-CH_2Br$

What are $N$ and $M$?

The decreasing order of boiling points of the following alkanes is:
$(a)$ Heptane
$(b)$ Butane
$(c)$ $2-$methylbutane
$(d)$ $2-$methylpropane
$(e)$ Hexane
Choose the correct answer from the options given below:

The major products $P$ and $Q$ of the following reactions respectively are:
$I$. $n$-pentyl bromide $\xrightarrow{Zn / H^{+}} P$
$II$. $n$-pentyl bromide $\xrightarrow[\text{Dry ether}]{Na} Q$