Crude sodium chloride contains impurities of:

N a_{2} S O_{4} only

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N a_{2} S O_{4} and C a C l_{2} only

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M g C l_{2} only

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N a_{2} S O_{4}, C a C l_{2}, C a S O_{4} and M g C l_{2}

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Solution

The correct option is D $N a_{2} S O_{4}, C a C l_{2}, C a S O_{4} and M g C l_{2}$
Crude sodium chloride contains $N a_{2} S O_{4}, C a S O_{4}, C a C l_{2} and M g C l_{2}$ as impurities, and therefore it is hygroscopic (moisture absorbing) in nature.

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