JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
The primary and secondary valencies of cobalt respectively in \(\left[ Co \left( NH _3\right)_5 Cl \right] Cl _2\) are :
- A \(3\) and \(5\)
- B \(2\) and \(6\)
- C \(2\) and \(8\)
- D \(3\) and \(6\)
Answer & Solution
Correct Answer
(D) \(3\) and \(6\)
Step-by-step Solution
Detailed explanation
\(\left[ Co \left( NH _3\right)_5 Cl \right] Cl _2\) Oxidation number of \(Co\) is \(+3\). So primary valency is \(3\). It is an octahedral complex so secondary valency \(6\) or Co-ordination number \(6\).
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