MHT CET · Chemistry · Structure of Atom
Find the value of spin only magnetic moment for chromium cation in +2 state.
- A \(3.87 \mathrm{BM}\)
- B \(4.90 \mathrm{BM}\)
- C \(2.84 \mathrm{BM}\)
- D \(1.73 \mathrm{BM}\)
Answer & Solution
Correct Answer
(B) \(4.90 \mathrm{BM}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{Cr}^{2+}:[\mathrm{Ar}] 3 \mathrm{~d}^4 \Rightarrow \mathrm{n}=4\)
\(\therefore \quad\) Spin-only magnetic moment,
\(\begin{aligned}
\mu & =\sqrt{\mathrm{n}(\mathrm{n}+2)} \mathrm{BM} \\
& =\sqrt{4(4+2)}=\sqrt{24} \mathrm{BM} \\
& =4.90 \mathrm{BM}
\end{aligned}\)
\(\therefore \quad\) Spin-only magnetic moment,
\(\begin{aligned}
\mu & =\sqrt{\mathrm{n}(\mathrm{n}+2)} \mathrm{BM} \\
& =\sqrt{4(4+2)}=\sqrt{24} \mathrm{BM} \\
& =4.90 \mathrm{BM}
\end{aligned}\)
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