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NEET 2015
Exam
NEET
Year
2015
Subject
Chemistry
Chapter
Coordination Compounds

NEET 2015 · Chemistry · Coordination Compounds

Which of these statements about [Co (CN) _ 6 ] ^ 3 - is true?

Which of these statements about [Co(CN)6]3−{\left[Co{\left(CN\right)}_{6}\right]}^{3 -} is true?Which of these statements about [Co (CN) _ 6 ] ^ 3 - is true?

Options

  1. A[Co(CN)6]3−{\left[Co{\left(CN\right)}_{6}\right]}^{3 -} has no unpaired electrons and will be in a low-spin configuration.
  2. B[Co(CN)6]3−{\left[Co{\left(CN\right)}_{6}\right]}^{3 -} has four unpaired electrons and will be in a low-spin configuration.
  3. C[Co(CN)6]3−{\left[Co{\left(CN\right)}_{6}\right]}^{3 -} has four unpaired electrons and will be in a high-spin configuration.
  4. D[Co(CN)6]3−{\left[Co{\left(CN\right)}_{6}\right]}^{3 -} has no unpaired electrons and will be in a high-spin configuration.

Correct answer

A. [Co(CN)6]3−{\left[Co{\left(CN\right)}_{6}\right]}^{3 -} has no unpaired electrons and will be in a low-spin configuration.

Step-by-step solution

Which of these statements about [Co (CN) _ 6 ] ^ 3 - is true?

Due to strong Ligand field of CN−C{N}^{-} ions pairing of electrons takes place in inner 3d orbital it is a low spin complex with no unpaired electrons.
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