Conversion of hexane into benzene involves the_____reaction.

Anhydrous sodium acetate on heating with soda lime gives_____.

The reaction of catalytic hydrogenation

${\mathrm{CH}}_{\mathrm{2}}={\mathrm{CH}}_{\mathrm{2}}+{\mathrm{H}}_{\mathrm{2}}\underset{250-300º\mathrm{C}}{\overset{\mathrm{Ni}}{\to }} {\mathrm{CH}}_{\mathrm{3}}-{\mathrm{CH}}_{\mathrm{3}}$, is called _____.

The fourth higher homologue of ethane is _____.