The reaction of methane with concentrated $HNO_3$ at high temperature yields .........

Why is Wurtz reaction not preferred for the preparation of alkanes containing an odd number of carbon atoms? Illustrate your answer by taking one example.

In the alkane $CH_3-CH_2-C(CH_3)_2-CH_2-CH(CH_3)_2$,identify $1^{\circ}$,$2^{\circ}$,and $3^{\circ}$ carbon atoms and give the number of $H$ atoms bonded to each one of these.

Pure methane can be produced by:

Kerosene is a mixture of

In which of the following reactions are both alkanes and alkenes obtained?