The primary and secondary valencies of chromium in the complex ion, dichlorodioxalatochromium (III), respectively are:

3,4

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4,3

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3,6

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6,3

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Solution

The correct option is C 3,6
Dichlorodioxalato chromium (III) a complex primary valency of metal is the oxidation number of metal and the secondary valency of the metal is the coordination number.

Therefore primary valancy and secondary valancy of chromium in complex is +3 and +6 respectively.

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