D-And F-Block Elements Ques 256

Question: The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate Fe(C2O4) in acidic solution is

[IIT-JEE 1997; KCET 1996]

Options:

A) 3/5

B) 2/5

C) 4/5

D) 1

Show Answer

Answer:

Correct Answer: A

Solution:

3MnO43M,+5(Fe2++C2O42)5M,+24H+ 3Mn2+5Fe3++10CO2+12H2O

Thus 5M of FeC2O4 is oxidised by 3M of KMnO4

then 1M of FeC2O4 is oxidised by 3/5 mole of KMnO4 .



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