Question

In the compounds ${KMnO_4}$ and ${K2Cr2O7}$ the highest oxidation state is of the element :

• A. Potassium
• B. Manganese
• C. Chromium
• D. Oxygen

Answer 1

Answer: (B)

Manganese

Answer 2

In $KMnO _{4}, K$ is in $+1$ oxidation state, $O$ is in $-2$ oxidation state $Mn$ is present in $+7$ oxidation state. In $K _{2} Cr _{2} O _{7}, K$ is in $+1$ oxidation state, $O$ is in $-2$ oxidation state Cr is present in $+6$ oxidation state. So $Mn$ is present in highest oxidation state.