Q.

According to werner theory primary, secondary and duel valency of central atom in  CoNH34Cl2Cl Complex respectively

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a

3,4 and 5

b

0,6 and 3

c

6,3 and 0

d

3,6 and 2

answer is D.

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Detailed Solution

3Cl- satisfies primary valency, 6NH3satisfies secondary valency and the ligand satisfy primary and secondary valency is called duel valency, that means ligand involved in calculation of primary and secondary valency. Hence 2Cl-  ligand acts as primary and secondary valency in given complex CoNH34Cl2Cl , so duel valency  of CoNH35ClCl2 Complex is 2
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According to werner theory primary, secondary and duel valency of central atom in  CoNH34Cl2Cl Complex respectively