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Topic: Crystal field theory, colour and magnetic properties· Coordination Compounds

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :Column I: a. Co^3+; b. Cr^3+; c. Fe^3+; d. Ni^2+Column II: i. √(8) B.M.; ii. √(35) B.M.; iii. √(3) B.M.; iv. √(24) B.M.;…

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :

Column I: a. Co\(^{3+}\); b. Cr\(^{3+}\); c. Fe\(^{3+}\); d. Ni\(^{2+}\)

Column II: i. \(\sqrt{8}\) B.M.; ii. \(\sqrt{35}\) B.M.; iii. \(\sqrt{3}\) B.M.; iv. \(\sqrt{24}\) B.M.; v. \(\sqrt{15}\) B.M.

1. a-iv, b-v, c-ii, d-i

2. a-iv, b-i, c-ii, d-iii

3. a-i, b-ii, c-iii, d-iv

4. a-iii, b-v, c-i, d-ii

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Answer: 1. a-iv, b-v, c-ii, d-i

Use \(\mu=\sqrt{n(n+2)}\) with \(n\) unpaired electrons.

  • \(\mathrm{Co^{3+}}\) (\(d^6\), high spin, n = 4): \(\sqrt{24}\) (iv).
  • \(\mathrm{Cr^{3+}}\) (\(d^3\), n = 3): \(\sqrt{15}\) (v).
  • \(\mathrm{Fe^{3+}}\) (\(d^5\), n = 5): \(\sqrt{35}\) (ii).
  • \(\mathrm{Ni^{2+}}\) (\(d^8\), n = 2): \(\sqrt{8}\) (i).

So a-iv, b-v, c-ii, d-i.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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