Answer:
Sodium chloride present in table
salt is not a hygroscopic salt. However, it contains the impurities of some
other salts like\[N{{a}_{2}}S{{O}_{4}},\,MgC{{l}_{2}},\,\,CaC{{l}_{2}}\]etc.
which are of hygroscopic nature. These salts absorb water vapours from air and
as a result, the table salt becomes wet particularly in the rainy season.
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