Coordination CompoundHard

Question

Which of the following is copper(I) compound ?

Options

A.[Cu(H2O)4]2+
B. [Cu(CN)4]3-
C.[Cu(NH3)4]2+
D.All of these

Solution

Let x be the oxidation state of copper in [Cu(CN)4]3-. So, x + 4(-1) = - 3 or x = 1.  In (A) and (C) the oxidation state of copper is +2.

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