When petroleum is heated,the vapours contain mainly:

In which of the following reactions does an acid-base reaction take place?

The product $(B)$ is:

Identify product $(P)$

Which of the following most accurately describes the first step in the reaction of hydrogen chloride with $1$-butene?

Consider the following reactions:
$(a)$ $CH_3-CH=CH_2 + HBr \rightarrow CH_3-CH(Br)-CH_3$
$(b)$ $CH_3-CH=CH_2 + HBr \xrightarrow{Peroxide} CH_3-CH_2-CH_2Br$
$(c)$ $CH_4 + Cl_2 \xrightarrow{hv} CH_3Cl + HCl$
Which of these reactions proceed via a free radical mechanism?