Question
Chemistry Question on d -and f -Block Elements
KMnO4 in alkaline medium changes to
A
Mn3+
B
MnO2
C
MnO42−
D
Mn(OH)4−
Answer
MnO2
Explanation
Solution
In alkaline solution, KMnO is first reduced to manganate and then to insoluble manganese dioxide. 2KMnO4+H2O−>[alkaline]2MnO2+2KOH+3[O]