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Reactivity with Halogens (Group 1)

Why does comm...

Question

Why does common salt get wet during the rainy season?

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Solution

Pure NaCl is not hygroscopic but table salt is impure NaCl containing impurities of ${Na}_{2} {SO}_{4}$ , ${CaSO}_{4}$ , ${MgCl}_{2}$ and ${CaCl}_{2}$ .
All of these being hygroscopic absorb moisture from the air in the rainy season. As a result, table salt gets wet.

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