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WBJEE Carbonyls — practice questions

Explore 1 free Carbonyls questions in WBJEE Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Carbonyls questions and exercises with answers

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The oxidation state of Cr in $[Cr(CO)_6]$ is (Z(Cr) = 24):Read the answer and worked solution →

Worked practice questions

The oxidation state of Cr in $[Cr(CO)_6]$ is (Z(Cr) = 24):

  1. +3
  2. +2
  3. +6
  4. 0
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Correct answer: D. 0

CO is a neutral ligand (zero charge). The complex is neutral, so Cr must have oxidation state **0**. EAN = 24 − 0 + 12 = 36 (Kr config) — rule obeyed.

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