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Question

The effective atomic number of Hg(At. No. 80) in the complex K2[HgI4] is

A
86
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B
84
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C
82
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D
88
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Solution

The correct option is A 86
The complex ion is [HgI4]2 and the metal ion is Hg2+
E.A.N = 80 - 2 + 4(2) = 86.

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