1.

When \[KMn{{O}_{4}}\]is reduced with oxalic acid in acidic solution, the oxidation number of \[Mn\] changes from [MNR 1987; MP PET 2000; CBSE PMT 2000; UPSEAT 2000, 02; BHU 2003; AMU 2002]

A.                 7 to 4    
B.                 6 to 4
C.                 7 to 2    
D.                 4 to 2
Answer» D.                 4 to 2


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