The gas responsible for explosions in coal mines is .......

How many chiral compounds are possible on monochlorination of $2$-methylbutane?

$Methane$ can be converted into $ethane$ by the reactions

Write about the Wurtz reaction or describe the preparation of alkanes from alkyl halides via the Wurtz reaction,including examples and its limitations.

The reaction of $n$-butane with bromine in the presence of light at $725\,^oC$ yields ...................

Explain the dry-cleaning of clothes or explain why grease stains can be removed by petrol.