MCQ
Which of the following solutions are acidic?
- A$\mathrm{CuSO}_4$
- B$\mathrm{CH}_3 \mathrm{COONH}_4$
- ✓$\mathrm{AlCl}_3$
- D$\mathrm{Na}_2 \mathrm{CO}_3$
✓
Answer
Correct option: C.
$\mathrm{AlCl}_3$
$(a)$ and $(c)$ are acidic.
Because they are salts of strong acid $\mathrm{H}_2 \mathrm{SO}_4$ and $\text{HCl}$ and weak bases $\mathrm{Cu}(\mathrm{OH})_2$ and $\mathrm{Al}(\mathrm{OH})_2$ respectively.
Because they are salts of strong acid $\mathrm{H}_2 \mathrm{SO}_4$ and $\text{HCl}$ and weak bases $\mathrm{Cu}(\mathrm{OH})_2$ and $\mathrm{Al}(\mathrm{OH})_2$ respectively.
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