1.

Which of the following complexes formed by `Cu^(2+)` ions is most stable ?A. `Cu^(2+) + 4NH_(3) ltimplies [Cu(NH)_(3)_(4)]^(2+). logK = 11.6`B. `Cu^(2+) + 4CN^(-) ltimplies [Cu(CN)_(4)]^(2-). Log K = 27.3`C. `Cu^(2+) + 4H_(2)O ltimplies [Cu(H_(2)O)_(4)]^(2+). Log K = 15.4`D. `Cu^(2+) + 4H_(2)O ltimplies [Cu(H_(2)O)_(4)]^(2+). Log K = 8.9`

Answer» Correct Answer - B
Greater the value of stablility constant (k) or log K, more is the stablity of the complex.


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