Exams › JEE Advanced › Chemistry

Among the following chlorides, which one shows the greatest covalent character?

1. FeCl2
2. ZnCl2
3. HgCl2
4. CdCl2

Correct answer: HgCl2

Solution

Hg2+ has an 18-electron (d10) outer shell giving it high polarising power, so HgCl2 is the most covalent of these chlorides.

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