Pure methane can be prepared by

$1,3-$Dibromopropane is heated with zinc dust in ether. The product formed is

In alkane compounds, the $C - H$ bond length and $H - C - H$ bond angle are respectively:

The maximum number of isomers (including stereoisomers) that are possible on monochlorination of the following compound is:

What are $X$ and $Y$ respectively in the following reaction sequence?
Isopentane $\xrightarrow{KMnO_4} X$ $\xrightarrow{\text{dehydration}} \underset{\text{Major}}{Y}$

Which of the following statements is not true for ethane?