Which functional group is present in the hydrocarbon chain of a detergent?

State the valency of each carbon atom in $(i)$ an alkane and $(ii)$ an alkyne.

$(i)$ Distinguish between saturated hydrocarbons and unsaturated hydrocarbons with the help of the combustion process.
$(ii)$ Write the chemical names of $C_{4}H_{10}$ and $C_{2}H_{2}$ and draw their structures.

What is the molecular formula of ethyl acetate?

The molecular formula of $A$ is $C_{10}H_{18}$ and $B$ is $C_{18}H_{36}$. Name the homologous series to which they belong.

The high temperature resistance property of $Neoprene$ is due to the presence of a large number of which atom?