When mercuric iodide is added to the aqueous solution of potassium iodide,

Freezing point is raised

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Freezing point is lowered

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Freezing point does not change

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Boiling point does not change

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Solution

The correct option is B Freezing point is lowered
HgI₂ although insoluble in water but shows complex formation with KI and freezing point decreases.

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