Question

Which of the following oxidation state is normally not observed for chromium in aqueous solution?

• A. +1
• B. +2
• C. +3
• D. +6

Answer 1

Answer: (A)

+1

Answer 2

Chromium (Cr) commonly exhibits oxidation states of +2, +3, and +6 in aqueous solutions. The +3 state is the most stable, while +2 acts as a reducing agent and +6 exists as chromate/dichromate ions. The +1 oxidation state is exceptionally rare for chromium in aqueous environments and is not typically observed.