WBJEE · Chemistry · Structure of Atom
The calculated spin-only magnetic moment values in \(\mathrm{BM}\) for \(\left[\mathrm{FeCl}_4\right]^{-}\)and \(\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}\) are
- A \(5.9 \mathrm{~BM},~ 1.732 \mathrm{~BM}~\)
- B \(4.89 \mathrm{~BM},~ 1.732 \mathrm{~BM}~\)
- C \(3.87 \mathrm{~BM},~ 1.732 \mathrm{~BM}~\)
- D \(1.732 \mathrm{~BM},~ 2.82 \mathrm{~BM}~\)
Answer & Solution
Correct Answer
(A) \(5.9 \mathrm{~BM},~ 1.732 \mathrm{~BM}~\)
Step-by-step Solution
Detailed explanation
Hint : \(\mathrm{Fe}^{+3}=[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^0\) \(\left[\mathrm{FeCl}_4\right]^{-}\) No pairing as \(\mathrm{Cl}^{-}\)is weak field ligand, hence have five unpaired electron \((n=5)\).…
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