JEE MAIN - Chemistry (2019 - 8th April Evening Slot - No. 16)

The covalent alkaline earth metal halide (X = Cl, Br, I) is :
CaX2
SrX2
MgX2
BeX2

Explanation

According to Fajan’s rule, when the size of cation is less then the covalent character would be more for the cation.

Since Be2+ has minimum size among given cation, therefore, BeX2 would be most covalent among given alkaline with metal halides

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