Coordination CompoundMediumBloom L3

Question

For the complex [Cr(C2O4)2(H2O)2]–, the oxidation number of Cr is ................and the coordination number of Cr is .......................

Options

A.+3, 6
B.+3, 4
C.+2, 6
D.+2, 4

Solution

Sol. For the complex [Cr(C2O4)2(H2O)2]–

Let oxidation number on Cr = x

x + (–2) × 2 = –1 ⇒ x = +3

Oxidation no. of Cr → + 3

Co-ordination no. of Cr = 2 × 2 + 2 = 6

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