Product $B$ is

Select the reaction$(s)$ that would result in the formation of $2-$bromopropane.
$(I) \ CH_3-CH=CH_2 + HBr \xrightarrow{\text{peroxide}}$
$(II) \ CH_3-CH=CH_2 + HBr \xrightarrow{CCl_4}$
$(III) \ CH_3-CH_2-CH_3 + Br_2 \xrightarrow{hv}$
$(IV) \ CH_3-CH=CH_2 + Br_2 \xrightarrow{CCl_4}$

Explain the isomerization reaction of alkanes.

Complete combustion of $CH_4$ gives

Methane reacts with steam at $1273 \ K$ in the presence of a nickel catalyst to form:

Petroleum ether can be used as