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Coordination Compounds question

2011 · Q106
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Coordination Compounds question

2011 · Q106

NEETChemistryCoordination CompoundsMCQ+4 / −1
Which of the following complex compounds will exhibit highest paramagnetic behaviour?
  1. A
    [Ti(NH3)6]3+
  2. B
    [Cr(NH3)6]3+
  3. C
    [Co(NH3)6]3+
  4. D
    [Zn(NH3)6]2+
View written solutionFree

Correct answer: B

Ti3+ →\to→ [Ar] 3d14s0 (1 unpaired electron)

Cr3+ →\to→ [Ar] 3d3 4s0 (3 unpaired electrons)

Co3+ →\to→ [Ar] 3d6 4s0 (0 unpaired electrons because of pairing)

Zn2+ →\to→ [Ar] 3d10 (no unpaired electrons)

[Cr(NH3)6]3+ exhibits highest paramagnetic behaviour as it contains 3 unpaired electrons.

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