Q.

Statement-1: LiF and CsI have low solubility in water. 

Statement-2: Both have high lattice enthalpy.

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a

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1. 

b

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1

c

Statement-1 is True, Statement-2 is False. 

d

Statement-1 is False, Statement-2 is true.

answer is C.

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Detailed Solution

The low solubility of LiF in water is due to its high lattice enthalpy whereas low solubility of CsI is due to smaller hydration enthalpy of its two ions. Thus the option C is correct.

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Statement-1: LiF and CsI have low solubility in water. Statement-2: Both have high lattice enthalpy.