Identify the wrong statement among the following for two ionic solids ,CaO and KI?

Lattice energy of CaO is much higher than that of KI.

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KI is soluble in benzene.

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CaO has high melting point.

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KI has high melting point.

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Solution

The correct option is C KI is soluble in benzene.
A) Lattice energy of CaO is much higher than that of KI. True because CaO is covalent in nature where as KI is ionic.
B) KI is soluble in benzene.False because KI is ionic compound so it is not soluble in non polar solvent.

C) CaO has high m.pt.True because the size of Ca is less than K
D) KI has high m.pt.True because lattice energy leads to high melting point.
Hence option B is correct.

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