Which of the following is a biodegradable synthetic polymer?

State the meaning of functional group in a carbon compound. Write the functional group present in $(i)$ ethanol and $(ii)$ ethanoic acid and also draw their structures.

What happens when ethyl alcohol and acetic acid react with each other in the presence of conc. $H_{2}SO_{4}$?

Give names of the following:
$(a)$ An alcohol containing $4$ carbon atoms.
$(b)$ An acid with $5$ carbon atoms.
$(c)$ Simplest ketone. Define functional group in a carbon compound. Mention names of any three functional groups with their formulae and example.

Which type of compound is ethyl acetate?

List four characteristics of homologous series.