Which among the following is NOT an example of salt of strong acid and weak base?

Which among the following is NOT an example of salt of strong acid and weak base?
  1. $\mathrm{NH}_4 \mathrm{Cl}$
  2. $\mathrm{NH}_4 \mathrm{NO}_3$
  3. $\mathrm{CuSO}_4$
  4. $\mathrm{Na}_2 \mathrm{SO}_4$

Solution

$\mathrm{Na}_2 \mathrm{SO}_4$ is a salt of strong base $(\mathrm{NaOH})$ and strong acid $\left(\mathrm{H}_2 \mathrm{SO}_4\right)$.

Asked in: MHT CET 2023 (12 May Shift 2)

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