The smallest compound,which on photochlorination produces diastereomers is

$2-$Methylbutane on reacting with bromine in the presence of sunlight gives mainly:

An alkane $(Y)$ requires $8$ moles of oxygen for complete combustion and on chlorination with $Cl_2/h\nu$, $(Y)$ gives only one monochlorinated product $(Z)$. The total number of primary carbon atoms in $(Y)$ is . . . . . . .

The chemicals and the reaction conditions required for the preparation of ethane are:

$Br^{\bullet}$ will abstract which of the hydrogen most readily?

$LPG$ is a mixture of