The $B.P.$ of branched-chain alkanes as compared to straight-chain alkanes is:

Which of the following represents an alkane?

Given below are two statements:
Statement $I$: Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of $CH_3MgBr$ with water.
Statement $II$: Methane cannot be prepared from unsaturated hydrocarbons and by Wurtz reaction.
In the light of the above statements, choose the correct answer from the options given below.

In which of the following substances is the carbon atom arranged in a regular tetrahedral structure?

Kerosene is a mixture of

$(CH_3)_2CHBr$ $\xrightarrow[(2) CuI]{(1) Li} (A)$ $\xrightarrow{(CH_3)_2CHCH_2Br} B$.
$'B'$ is