Write the names of:

(a) first three members of carboxylic acid series.

(b) three compounds which can be oxidised directly, or in stages to produce acetic acid.

(a) First three members of carboxylic acid series are:

1. Methanoic acid (formic acid)
2. Ethanoic acid (acetic acid)
3. propanoic acid (propionic acid)

(b) Three compounds which can be oxidised directly, or in stages to produce acetic acid are:

1. Ethanol
2. Acetylene
3. Ethanal