Which of the following is the best method for the preparation of methane?

The relative reactivity of $1^o H$,$2^o H$,and $3^o H$ in bromination reaction has been found to be $1 : 82 : 1600$ respectively. In the reaction $CH_3-CH(CH_3)-CH_3 \text{ (excess)} + Br_2$ $\xrightarrow{hv} CH_3-C(Br)(CH_3)-CH_3 \text{ (A)} + CH_3-CH(CH_3)-CH_2-Br \text{ (B)}$,the percentage yields of the products $(A)$ and $(B)$ are expected to be:

Wurtz reaction of methyl iodide yields an organic compound $X$. Which one of the following reactions also yields $X$?

Give the general formula of the alkane series and discuss the structure of methane.

In the process of cracking,what happens?

Natural gas is a mixture of