`KMnO_(4)` in excess on treatment with concentrated `H_(2)SO_(4)` forms a compound (X) which decomposes explosively on heating forming (Y). The (X) and (Y) are respectively.

Options

A. `Mn_(2)O_(7),MnO_(2)`
B. `Mn_(2)O_(7),Mn_(2)O_(3)`
C. `MnSO_(4),Mn_(2)O_(3)`
D. `Mn_(2)O_(3),MnO_(2)`

Answer

A

Explanation

`2KMnO_(4)+3H_(2)SO_(4)to2KHSO_(4)+(MnO_(3))_(2)SO_(4)+2H_(2)O`
`(MnO_(3))_(2)SO_(4)+H_(2)OtoMn_(2)O_(7)+H_(2)SO_(4)`
`Mn_(2)O_(7)overset(Delta)to2MnO_(2)+(3)/(2)O_(2)`