Which one of the following salt does not hydrolyzed________________?
Correct answer: A. Na2SO4
- A. Na2SO4
- B. AlCl3
- C. CuSO4
- D. NH4Cl
Explanation
In the usual school-level approximation, Na2SO4 is treated as a salt of a strong acid and strong base, so its ions do not appreciably hydrolyse and option a is selected. Students may choose NH4Cl because it contains a non-metal ion, but NH4+ hydrolyses and makes that solution acidic. Strictly, SO4^2− undergoes slight hydrolysis, so this answer relies on the standard approximation.
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