Question

Common oxidation state of Cr?

• A. +3
• B. +2
• C. +6
• D. +1

Hint:

When studying transition metals, the highest oxidation state is often the most common, but lower oxidation states may also be found in certain compounds.

Answer 1

The Correct Option is C

Chromium (Cr) can have several oxidation states, but the most common ones are +2, +3, and +6.

1. Step 1: Understanding common oxidation states. - In its most common oxidation state, Cr has a +3 charge. This occurs in compounds like chromium(III) chloride \( \text{CrCl}_3 \). - Chromium can also form a +6 oxidation state, as seen in compounds like chromium(VI) oxide \( \text{CrO}_3 \) and potassium dichromate \( \text{K}_2\text{Cr}_2\text{O}_7 \). - The +2 oxidation state of chromium is less common but still stable in some compounds. Thus, the most common oxidation states of chromium are +3 and +6, with +6 being the most common.