HCl gas is passed through a saturated solution of NaCl containing MgCl2 & CaCl2 impurities. NaCl is precipitated during this process which is best explained by
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a
More ionic character in NaCl
b
High lattice enthalpy of NaCl
c
Lesser solubility of NaCl compared to MgCl2 and CaCl2
d
High Polarising Power of Na+ ion
answer is C.
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Detailed Solution
Solubility of NaCl is lesser than that of CaCl2 & MgCl2 . When HCl gas is passed through the mixture, [Cl−] increases, Ionic product of NaCl exceeds its solubility product easily. Thus it gets precipitated