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Which of the following compound releases heat when dissolved in water?

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in Chemistry – Class 12 by (188k points)
Which of the following compound releases heat when dissolved in water?

(a) Barium chloride

(b) Ammonium chloride

(c) Lead chloride

(d) Calcium chloride

I got this question in an online quiz.

I'd like to ask this question from Solubility Solutions in chapter Solutions of Chemistry – Class 12

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The correct answer is (d) Calcium chloride

The best I can explain: Out of the given options calcium chloride is the only salt which releases heat upon dissolving. Barium chloride and ammonium chloride undergo endothermic dissolution which decreases the temperature of water. However, lead chloride is an insoluble salt and does not dissolve.

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