Question

Which of the following salts will give basic solution on hydrolysis?

• A. $N{H}_{4}Cl$
• B. $KCl$
• C. $K_{2}C{O}_3$
• D. $(N{H}_4{)}_{2}C{O}_3$

Answer 1

The correct option is C $K_{2}C{O}_3$

$K_{2}C{O}_3+2H_{2}O\rightleftharpoons H_{2}C{O}_3+2KOH$

$KOH\rightleftharpoons K^{+}+O{H}^{-}\left(base\right)$

It is a double displacement reaction, where the anioins and cations of two different molecules switch places, forming two entirely different compounds.

$K_{2}C{O}_3$ potassium carbonate on hydrolysis gives $KOH$ which is a strong base and is highly ionisable and therefore the solution becomes strongly basic.