Question

Crude common salt is hygroscopic because of impurities of

• A. $CaSO_4$ and $MgSO_4$
• B. $CaCl_2$ and $MgCl_2$
• C. $CaBr_2$ and $MgBr_2$
• D. $Ca(HCO_3)_2$ and $Mg(HCO_3)_2$

Answer 1

Answer: (B)

$CaCl_2$ and $MgCl_2$

Answer 2

Crude common salt contains impurities such as $CaSO _{4}, CaCl _{2}, MgCl _{2}$. Hence it is deliquescent (hygroscopic).