What is the value of primary valence of $\mathrm{Co}$ in $\mathrm{CoCl}_{3}$ ?

What is the value of primary valence of $\mathrm{Co}$ in $\mathrm{CoCl}_{3}$ ?
  1. 2
  2. 4
  3. 3
  4. 1

Solution

Primary valence $=$ Oxidation state of $\mathrm{Co}=+3$

Asked in: MHT CET 2020 (12 Oct Shift 2)

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