Which of the following cannot be prepared using the Wurtz reaction?

Which of the following compounds is not obtained when a mixture of $CH_3Br$ and $C_2H_5Br$ is treated with sodium metal in the presence of dry ether?

The general formulas for alkene and alkane are respectively:

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.

$A$ hydrocarbon $C_5H_{12}$ does not react with chlorine in the dark but gives six monochloro compounds in bright sunlight. The hydrocarbon is:

How many $1^o$ carbon atoms will be present in the simplest hydrocarbon having two $3^o$ and one $2^o$ carbon atom?