Paraffin wax is

The sodium salt of which acid is required for the preparation of propane by decarboxylation? Write the chemical equation for the reaction.

Least hindered rotation about carbon-carbon bond is observed in

Compared to the chlorination of alkanes,bromination is.......

Which one of the following compounds does not give addition reactions?

Arrange the following in decreasing order of their boiling points:
$(A)$ $2-$Methylbutane
$(B)$ $2,2-$Dimethylpropane
$(C)$ Pentane
$(D)$ Hexane