Which element from following exhibits common oxidation state +2 only?

Which element from following exhibits common oxidation state +2 only?
  1. $\mathrm{Cu}$
  2. Co
  3. Sc
  4. $\mathrm{Zn}$

Solution

Zn shows +2 O.S. only

Asked in: MHT CET 2022 (07 Aug Shift 2)

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