Q.

Melting point of calcium halides decreases in the order

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a

CaF2>CaCl2>CaBr2>CaI2

b

CaI2>CaBr2>CaCl2>CaF2

c

CaBr2>CaI2>CaF2>CaCl2

d

CaCl2>CaBr2>CaI2>CaF2

answer is A.

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Detailed Solution

As the size of the anion increases, the lattice energy decreases and hence the mp.
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