Common salt is hygroscoic because of the presence of the
following impurities :
(1) CaSO4 and MgSO4
(2) CaCl2 and MgCl2
(3) CaBr2 and MgBr2
(4) CaCO3 and MgCO3
Answer Posted / guest
( 2 ) CaCl2 and MgCl2
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