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  4. 20 ml of a N-solution of KMnO4, just reacts with 20 ml of a solution of oxalic acid. The weight of oxalic acid crystals 1 litre of the solution is:

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Q. 20 ml of a N-solution of $ KMn{{O}_{4}}, $ just reacts with 20 ml of a solution of oxalic acid. The weight of oxalic acid crystals 1 litre of the solution is:

JIPMERJIPMER 1999

Solution:

$ 20\,\text{ml}\,N\text{-}KMn{{O}_{4}}\cong 20\,\text{ml}\,\,N\text{-}oxalic\,acid $ $ \therefore $ Normality of oxalic acid solution = 1 N We know, $ w=\frac{NEV}{1000}=\frac{1\times 63\times 1000}{1000} $