JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
The correct statement among the following is :
- A \(\left[ Ni ( CN )_4\right]^{2-}\) and \(\left[ NiCl _4\right]^{2-}\) are diamagnetic and \(Ni ( CO )_4\) is paramagnetic.
- B \(Ni ( CO )_4\) and \(\left[ NiCl _4\right]^{2-}\) are diamagnetic and \(\left[ Ni ( CN )_4\right]^{2-}\) is paramagnetic.
- C \(Ni ( CO )_4\) and \(\left[ Ni ( CN )_4\right]^{2-}\) are diamagnetic and \(\left[ NiCl _4\right]^{2-}\) is paramagnetic.
- D \(Ni ( CO )_4\) is diamagnetic and \(\left[ NiCl _4\right]^{2-}\) and \(\left[ Ni ( CN )_4\right]^{2-}\) are paramagnetic.
Answer & Solution
Correct Answer
(C) \(Ni ( CO )_4\) and \(\left[ Ni ( CN )_4\right]^{2-}\) are diamagnetic and \(\left[ NiCl _4\right]^{2-}\) is paramagnetic.
Step-by-step Solution
Detailed explanation
\(\left[ Ni ( CN )_4\right]^{2-} \rightarrow 3 d^8 \rightarrow\) diamagnetic \(\rightarrow dsp ^2\) \(\left[ Ni ( CO )_4\right] \rightarrow 3 d^{10} \rightarrow\) diamagnetic \(\rightarrow sp ^3\)…
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