Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums.
Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen.
On passing `CO_(2)` in the solution of (A), a purple coloured solution along with brown ppt is observed.
A. This is a disproportionation reaction where oxidation number changes from +6 to +7, +4.
B. This is a comproportionation reaction where oxidation number changes from +3 to +2
C. Both A and B
D. none
