Question

Coordination number of Co in \( [Co(NH_3)_6]Cl_3 \) is

• A. +2
• B. +3
• C. +5
• D. +6

Hint:

The coordination number is determined by the number of ligands directly bonded to the central metal ion.

Answer 1

The Correct Option is D

Step 1: Understanding Coordination Number.
The coordination number is the number of ligands bonded to the central metal atom. In \( [Co(NH_3)_6]Cl_3 \), the coordination number of cobalt is 6 because there are six ammonia molecules as ligands.
Step 2: Conclusion.
The correct answer is (D), +6.