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Q.

Which of the following pair of alkali metal halides is least soluble in water?

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a

RbF, CsF

b

NaBr, KF

c

LiCl, KBr

d

LiF, Csl

answer is A.

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Detailed Solution

LiF has high lattice enthalpy due to small size of ions.

CsI is quite less soluble in water because of low hydration energies of large size ions.

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