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MHT CET · Chemistry · Practical Chemistry

Which among following salts shows decrease in solubility with increase in temperature?

  1. A \(\mathrm{Na}_2 \mathrm{SO}_4\)
  2. B \(\mathrm{KNO}_3\)
  3. C \(\mathrm{NaNO}_3\)
  4. D \(\mathrm{KBr}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\mathrm{Na}_2 \mathrm{SO}_4\)

Step-by-step Solution

Detailed explanation

Dissolution of \(\mathrm{Na}_2 \mathrm{SO}_4\) in water is an exothermic process. When a substance dissolves in water by an exothermic process, its solubility decreases with an increase in temperature. Hence, solubility of \(\mathrm{Na}_2 \mathrm{SO}_4\) in water decreases with increase in temperature.