CUET · CHEMISTRY · PYQ PAPER 2025
Number of unpaired electrons in the square planar [Pt(CN)4]2- are :
- A Two unpaired electrons
- B Zero unpaired electron
- C One unpaired electrons
- D Three unpaired electrons
Answer & Solution
Correct Answer
(B) Zero unpaired electron
Step-by-step Solution
Detailed explanation
\(\text{Pt} + 4(-1) = -2 \implies \text{Pt} = +2\) \(\text{Pt}^{2+}\) electron configuration: \([Xe] 4f^{14} 5d^8\) CN is a strong field ligand, geometry is square planar. In square planar \(d^8\) complexes with strong field ligands, all electrons are paired. Number of unpaired…
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