Question

$M^{+3}$ ion loses $3e^{-}$. Its oxidation number will be

• A. 0
• B. +3
• C. +6
• D. -3

Answer 1

The correct option is C

+6

Looking at the ion $M^{3+}$ - clearly the oxidation number is +3.

Further - $M^{3+}$ loses 3 electrons to be come $M^{6+}$.
Hence - the new oxidation number is 6.