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3 moles of metal complex with formula \mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{3} gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of CO in the complex is_______.
(Round off to the nearest integer)
 

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The given complex is \left[\mathrm{Co}(\mathrm{en})_{3}\right] \mathrm{Cl}_{3}  and its primary valency is 3 and secondary valency is 6 .

Hence, the answer is 6.

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sudhir.kumar

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