What is the molecular formula of ethyl alcohol?

Which type of compound is ethyl acetate?

What is a functional group? Give examples of four different functional groups.

Describe a chemical test to distinguish between ethanol and ethanoic acid.

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.

Which among the following are unsaturated hydrocarbons?
$(i) H_3C - CH_2 - CH_2 - CH_3$
$(ii) H_3C - C \equiv C - CH_3$
$(iii) H_3C - CH(CH_3) - CH_3$
$(iv) H_3C - C(CH_3) = CH_2$