Multiple choice

The orange colour of Cr2O72- is due to __________.

  1. the metal to ligand charge transfer transition

  2. ligand to metal charge transfer transition

  3. crystal field transition

  4. charge transfer complexes formation

  5. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because in the ions of Cr2O72-, the Cr have six oxidation state, due to fact that all the electrons are removed from Cr atom. Therefore, the oxygen atoms are low lying MOs of Cr atom in this condition Cr2O72-.

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