Question

KMnO4 is the oxo salt of :

• A. MnO2
• B. Mn2O7
• C. MnO3
• D. Mn2O3

Answer 1

Answer: (B)

Mn2O7

Answer 2

Mn2O7 is an acid anhydride of HMnO4 and thus MnO4– is oxo-salt of Mn2O7.

n2O7 + H2O $\longrightarrow$2HMnO4 ;

2HMnO4 + 2KOH$\longrightarrow$ 2KMnO4 + 2H2O.