Question

Partial neutralisation of a polybasic acid gives

• A. Acidic salt
• B. Basic salt
• C. Normal salt
• D. Double salt

Answer 1

The correct option is A

Acidic salt

A polybasic acid contains more than one replaceable H atoms. It can undergo either partial or complete ionisation in several steps i.e., one $H^{+}$ ion is separated from the molecule at one time.
The salts which contain replaceable hydrogen atom(s) when released in the aqueous solvent are termed as acidic salts.
For example, $NaOH+H_{2}S{O}_4\to NaHS{O}_4+H_{2}O$, $NaHS{O}_4$ is an acidic salt due to the presence of one replaceable H atom which can be further be replaced to give $N{a}_{2}S{O}_4$.