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BITSAT 2024Paper 1
Exam
BITSAT
Year
2024
Paper
Paper 1
Subject
Chemistry
Chapter
Coordination Compounds

BITSAT 2024 · Paper 1 · Chemistry · Coordination Compounds

The complex with highest magnitude of crystal field splitting...

The complex with highest magnitude of crystal field splitting energy (Δ0)\left(\Delta_0\right) is

Options

  1. A\left[\mathrm{Cr}\left(\mathrm{OH}_2\right)_6\right]^{3+}
  2. B\left[\mathrm{Ti}\left(\mathrm{OH}_2\right)_6\right]^{3+}
  3. C\left[\mathrm{Fe}\left(\mathrm{OH}_2\right)_6\right]^{3+}
  4. D\left[\mathrm{Mn}\left(\mathrm{OH}_2\right)_6\right]^{3+}

Correct answer

A. \left[\mathrm{Cr}\left(\mathrm{OH}_2\right)_6\right]^{3+}

Step-by-step solution

smaller cations prefer coordinate bonding due to greater polarizing power. Ti+3=67pm\mathrm{Ti}^{+3}=67 \mathrm{pm} radius, Cr3+=62pm\mathrm{Cr}^{3+}=62 \mathrm{pm} radius Mn+3=65pm\mathrm{Mn}^{+3}=65 \mathrm{pm} radius, Fe+3=65pm\mathrm{Fe}^{+3}=65 \mathrm{pm} radius So, Cr3+\mathrm{Cr}^{3+} has highest tendency to attract ligand.
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