$LPG$ mainly consists of the following:

$A$ hydrocarbon of molecular mass $72 \ g \ mol^{-1}$ gives a single monochloro derivative and two dichloro derivatives on photochlorination. Give the structure of the hydrocarbon.

In alkanes,the bond angle is $...^o$.

Identify the total number of monochlorinated products formed when $2$-methylpentane reacts with $Cl_2 / hv$.

Which of the following organic compounds will give a mixture of $1$-chlorobutane and $2$-chlorobutane on chlorination?

Which of the following products is obtained by the controlled oxidation of methane in the presence of copper catalyst at $523 \ K$ and $100 \ atm$?