MHT CET · Chemistry · Ionic Equilibrium
Which among the following salt turns blue litmus red in its aqueous solution?
- A \(\mathrm{CuSO}_4\)
- B \(\mathrm{Na}_2 \mathrm{CO}_3\)
- C \(\mathrm{Na}_2 \mathrm{SO}_4\)
- D \(\mathrm{NaNO}_3\)
Answer & Solution
Correct Answer
(A) \(\mathrm{CuSO}_4\)
Step-by-step Solution
Detailed explanation
\(\mathrm{CuSO}_4\) is formed from a weak base (\(\mathrm{Cu(OH)}_2\)) and a strong acid (\(\mathrm{H}_2\mathrm{SO}_4\)), making its aqueous solution acidic. Acidic solutions turn blue litmus red. Answer: \(\mathrm{CuSO}_4\)
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