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Question

The compound having more covalent nature is:

A
BaCl2
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B
MgCl2
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C
SrCl2
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D
BeCl2
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Solution

The correct option is D BeCl2
Be, Mg, Sr and Ba belong to the same group. Also, we know that down the group, the size of atom increases. So, Be will be the smallest in size and Ba will be largest. Now, from Fajan's rule of polarization, smaller the size, more is the polarizing power, so more is the covalent character.
Since, Be has the smallest size, BeCl2 will have maximum covalent character.

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