A) \[Ca{{F}_{2}}<CaC{{l}_{2}}<CaB{{r}_{2}}<Ca{{I}_{2}}\]
B) \[CaC{{l}_{2}}<Ca{{F}_{2}}<CaB{{r}_{2}}<Ca{{I}_{2}}\]
C) \[Ca{{F}_{2}}>CaC{{l}_{2}}>CaB{{r}_{2}}>Ca{{I}_{2}}\]
D) \[CaC{{l}_{2}}>Ca{{F}_{2}}>CaB{{r}_{2}}>Ca{{I}_{2}}\]
Correct Answer: C
Solution :
According to Fajan's rule, Covalent character\[\propto \]size of anion\[\propto \frac{1}{melting\text{ }point}\] (\[\because \]Attraction decreases) Thus, the order of melting point is \[Ca{{F}_{2}}>CaC{{l}_{2}}>CaB{{r}_{2}}>Ca{{I}_{2}}\]
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