Which of the following is covalent in nature? (X=!l,Br,I)
A
BeX2
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B
CaX2
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C
MgX2
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D
SrX2
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Solution
The correct option is ABeX2 According to Fajan's rule when the size of cation decreases, then covalent character increase. So BeX2BeX2 is covalent in nature.