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Commercial common salt becomes slightly ...

Commercial common salt becomes slightly damp on keeping.

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Pure NaCl is not hygroscopic. The commercial common salt consists small amounts of magnesium chloride and calcium chloride which absorb moisture from atmosphere making it damp.
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Assertion (A): In rainy season, common salt becomes damp after sometime on keeping. Reason (R ): Common salt (NaCI) is hygroscopic in nature.

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