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For decolourisation of 1 "mol of" KMnO(4...

For decolourisation of `1 "mol of" KMnO_(4)`, the moles of `H_(2)O_(2)` required is

A

`1/2`

B

`3/2`

C

`5/2`

D

`7/2`

Text Solution

Verified by Experts

The correct Answer is:
C
Acidified `KMnO_(4)` is decolourised by `H_(2)O_(2)` in following way.
`2KMnO_(4)+3H_(2)SO_(4)toK_(2)SO_(4)+2MnS_(4)+3H_(2)O+5O5H_(2)+5Oto5H_(2)O+5O_(2)`
`2KMnO_(4)+3H_(2)SO_(4)+5H_(2)O_(2)toK_(2)SO_(4)+2MnSO_(1)+8H_(2)O+5O_(2)`Thus for 2 moles of `KMnO_(4)` required `H_(2)O_(2)=5` for 1 mole of `KMnO_(4)`required `H_(2)O_(2)=5//2`mole.
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