Q.

The primary valency of chromium in the complex ion, dichloro dioxalato chromium(III)

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a

2

b

3

c

4

d

6

answer is B.

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Detailed Solution

Dichloro dioxalato chromium (III) an formula is CrC2O42Cl2−3  In this complex chromium oxidation state = +3  primary valences of Metal is equals to it’s oxidation state.
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