Assertion :Statement -I: $N a C l$ when exposed in air it becomes wet.
Reason: Statement -II: $N a C l$ contains hygroscopic impurities like ${C a C l}_{2}$ , ${M g C l}_{2}$ etc.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Magnesium chloride and calcium chloride are the common impurities present in table salt. It is highly hygroscopic and absorbs moisture from the air.

Because of the presence of $M g C l_{2}$ and $C a C l_{2}$ in sodium chloride(common/table salt), it becomes wet.

This type of wetting is generally observed in the samples of table salt obtained from seawater directly because magnesium chloride also occurs in seawater.

So both Assertion and Reason are correct but Reason is the correct explanation for Assertion.

Hence option A is correct.

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Assertion :Statement -I: NaCl when exposed in air it becomes wet. Reason: Statement -II: NaCl contains hygroscopic impurities like CaCl2, MgCl2 etc.

Assertion :Statement -I: $N a C l$ when exposed in air it becomes wet.
Reason: Statement -II: $N a C l$ contains hygroscopic impurities like ${C a C l}_{2}$ , ${M g C l}_{2}$ etc.