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BITSAT 2024Paper 2
Exam
BITSAT
Year
2024
Paper
Paper 2
Subject
Chemistry
Chapter
Coordination Compounds

BITSAT 2024 · Paper 2 · Chemistry · Coordination Compounds

Which of the following is correct order of ligand field strength?

Which of the following is correct order of ligand field strength?

Options

  1. ACO<\mathrm{CO} < en <NH3<C2O42−<S2−< \mathrm{NH}_3 < \mathrm{C}_2 \mathrm{O}_4^{2-} < \mathrm{S}^{2-}
  2. BS2−<C2O42−<NH3<en<CO\mathrm{S}^{2-} < \mathrm{C}_2 \mathrm{O}_4^{2-} < \mathrm{NH}_3 < \mathrm{en} < \mathrm{CO}
  3. CNH3<en<CO<S2−<C2O42−\mathrm{NH}_3 < \mathrm{en} < \mathrm{CO} < \mathrm{S}^{2-} < \mathrm{C}_2 \mathrm{O}_4^{2-}
  4. DS2−<NH3<en<CO<C2O42−\mathrm{S}^{2-} < \mathrm{NH}_3 < \mathrm{en} < \mathrm{CO} < \mathrm{C}_2 \mathrm{O}_4^{2-}

Correct answer

B. S2−<C2O42−<NH3<en<CO\mathrm{S}^{2-} < \mathrm{C}_2 \mathrm{O}_4^{2-} < \mathrm{NH}_3 < \mathrm{en} < \mathrm{CO}

Step-by-step solution

The increasing order of field strength of ligands (according to spectrochemical series) S2−<C2O42−<NH3<en<CO\mathrm{S}^{2-} < \mathrm{C}_2 \mathrm{O}_4^{2-} < \mathrm{NH}_3 < \mathrm{en} < \mathrm{CO}
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