Knocking sound occurs in an engine when fuel:

Formation of alkane by the action of $Zn$ on alkyl halide is called

The most important method of preparation of hydrocarbons of lower carbon number is

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

The reaction $CH_2 = CH_2 + H_2 \xrightarrow[250 - 300^{\circ}C]{Ni} CH_3 - CH_3$ is called:

Find the number of monochlorinated products formed by $2$-methylbutane. $(\text{Only structural isomers})$