What is the monomer unit of neoprene?

Mineral acids are stronger acids than carboxylic acids because:
$(i)$ Mineral acids are completely ionised.
$(ii)$ Carboxylic acids are completely ionised.
$(iii)$ Mineral acids are partially ionised.
$(iv)$ Carboxylic acids are partially ionised.

Which of the following monomers is used in the synthesis of polythene?

Mention four characteristics which change with increasing molecular mass in a homologous series.

Unsaturated hydrocarbons contain multiple bonds between two $C$ atoms and show addition reactions. Give the test to distinguish ethane from ethene.

The general formula of three compounds $A, B$ and $C$ is $C_{n}H_{2n}$. $B$ has the highest boiling point and $C$ has the lowest boiling point.
$(i)$ Mention the type of compound $A, B$ and $C$.
$(ii)$ Which of these has the minimum number of carbon atoms?
$(iii)$ Name the homologous series to which $A, B$ and $C$ belong.