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Statement -I : Common salt is deliquescent

Statement-II: Solubility of NaCl increases with increase in temperature

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By Expert Faculty of Sri Chaitanya
a
Both statements I and II are correct
b
Statement-I is correct and statement-II is incorrect
c
Statement-I is incorrect and statement-II is correct
d
Both statements I and II are incorrect

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detailed solution

Correct option is B

Pure NaCl is not deliquescent. CaCl2 and MgCl2 present as impurities in NaCl are responsible for deliquescence;∆Hsolution =∆Hhydration(exothermic)+∆Hlatticeenthalpy(endothermic) For Nacl dissolved in H2O ∆Hhydrationethalpy(-784 kJ)≈∆Hlatticeenthalpy(+788 kJ)∴∆Hsolution=+4 kJ =+1 k cal∆Hsolutionis almost negligible.(almost zero)∴solubility of NaCl in water  almost remains constant with change in temperature


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