The sum of oxidation states of all atoms in $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}$ ion is

The sum of oxidation states of all atoms in $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}$ ion is
  1. Zero
  2. -2
  3. +2
  4. -1

Solution

The sum of oxidation states of all atoms $\mathrm{Cr}_2 \mathrm{O}_7^2$ is -2

Asked in: MHT CET 2020 (14 Oct Shift 2)

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