Which of these does not undergo the Wurtz reaction?

Which of the following is obtained as the major product when an excess of methane is treated with a limited amount of chlorine in the presence of $UV$ light?

Identify the reagent $R$ used in the following reaction:
$CH_3-CH(CH_3)-CH_3 \xrightarrow{R} CH_3-C(Br)(CH_3)-CH_3$

Which is the correct option for the following reaction?
$ 2 CH_3 CH_2 Br \xrightarrow{2 Na / \text{Dry ether}} ? $

Identify the correct statements from the following:
$(i)$ Petrol and $CNG$ operated automobiles cause less pollution.
$(ii)$ Alkanes having tertiary hydrogen can be oxidised to alcohols by $KMnO_4$.
$(iii)$ Methane can be prepared by Kolbe's electrolytic method.
$(iv)$ Alkyl chloride on reduction with zinc and dilute hydrochloric acid gives alkane.

$A$ liquid hydrocarbon can be converted to a gaseous hydrocarbon by: