The number of shared pairs of electrons in propane is

$C.N.G$ is........

The reaction $CH_2 = CH_2 + H_2 \xrightarrow[250 - 300^{\circ}C]{Ni} CH_3 - CH_3$ is called:

Which one gives only one monosubstitution product on chlorination?

An unknown compound $X$ on chlorination followed by Wurtz reaction and dehydrohalogenation gives ethene. Provide the complete reaction sequence in a stepwise manner.

Which gas is liberated when $Al_4C_3$ is hydrolysed?