Question

Why does common salt become wet in the rainy season ?

Answer 1

this means that salt is hygroscopic , so it absorbs both liquid water and water vapour present in air. common salt absorb moisture because they have impurities such as calcium chloride which are hygroscopic in nature. ...it absorbs moisture from the atmosphere which has high humidity in the rainy season.

Answer 2

There are different chemical substances which are highly reactive with water.That's why they absorb the surrounding's atmospheric water molecules become slimy.

These chemical substances are known as the hygroscopic substances.

Similarly, common salt is also a hygroscopic substance and that's why it becomes wet in the rainy season.