WBJEE 2022 Physics and Chemistry Paper

Hint:
- pH of a solution of strong acid and weak base (say NH4Cl ) is less than 7 .
- For hydrolysis of salt of weak acid and weak base.
When Ka>Kb,‌‌pH<7
- pH of 10−8MHCl(aq) will be less than 7.
- Conjugate acid of NH2−is NH3. This is a true statement.