Statement-1 : Addition of HgI 2 to aqueous solution of KI increases the freezing point. Statement-2: A complex K 2 [ HgI 4 ] is formed.

Question

Statement-1 : Addition of HgI 2 ​ to aqueous solution of KI increases the freezing point. Statement-2: A complex K 2 ​ [ HgI 4 ​ ] is formed.

TestHub · Accepted Answer

In aqueous KI solution, the addition of HgI₂ leads to the formation of a complex:

$H g I_{2} + 2 K I \to K_{2} [H g I_{4}]$ Due to complex formation, the number of ions in the solution decreases. A lower number of solute particles causes a decrease in the depression of the freezing point. Hence, the freezing point increases compared to the original KI solution.

Statement-1 and Statement-2 are true, and Statement-2 correctly explains Statement-1. ∴ Correct Answer: (A)

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