According to werner theory secondary valency of central atom in CoNH34Cl2Cl Complex is satisfy by fallowing species

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NH3

Cl-

Co+3

NH3 and Cl-

answer is D.

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Detailed Solution

2Cl- and 4NH3 ligands are directly donate the electron pair towards central metal atom Co, so coordination number satisfy the secondary valency. Hence secondary valency CoNH34Cl2Cl Complex is 6

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