Acidified `KMnO_(4)` oxidizes acid to `CO_(2)`. What is the volume ( in litre) of `10^(-4) M KMnO_(4)` required to completely oxidize 0.5 litre of `10^(-2)` M oxalic acid in acid medium ?

Options

A. 125
B. 1250
C. 200
D. 20

Answer

D

Explanation

`2KMnO_(4)+3H_(2)SO_(4)+5{:(COOH,),(|" ",),(COOH,):}toK_(2)SO_(4)+2MnSO_(4)+10CO_(2)+8H_(2)O`
`(M_(1)V_(1))/(n_(1))(KMnO_(4))=(M_(2)V_(2))/(n_(2)){:((COOH,),(|" ",),(COOH,)):}`
`(10^(-4)xxV_(1))/(2)=(10^(-2)xx0.5)/(5)`
`V_(1)=20 L`