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Q.

Coordination number and oxidation number respectively for the complex [Co(NH3)4Cl2]ClO4

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a

6, + 1

b

+ 6, + 2

c

6, + 3

d

4, + 3

answer is A.

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Detailed Solution

[Co(NH3)4Cl2]ClO4

x +4(0) +2(-1)+1(-1) =0

x +(-2) +(-1) =0

x -3 =0

x= +3

The oxidation state of Co is +3 

Here, there are 5 NH3​ molecules and one Cl− ion in the coordination complex. So, the coordination number is 6. 

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