D-And F-Block Elements Ques 245

Question: $ KMnO_4 $ reacts with ferrous sulphate according to the equation $ MnO_4^{-}+5F{{e}^{2+}}+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4H_2O $ Here $ 10ml $ of $ 0.1M $ $ KMnO_4 $ is equivalent to

[CPMT 1999]

Options:

A) $ 20ml $ of $ 0.1M $ $ FeSO_4 $

B) $ 30ml $ of $ 0.1M $ $ FeSO_4 $

C) $ 40ml $ of $ 0.1M $ $ FeSO_4 $

D) $ 50ml $ of $ 0.1M $ $ FeSO_4 $

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Answer:

Correct Answer: D

Solution:

In this reaction $ \underset{1}{\mathop{MnO_4^{-}}},+\underset{5}{\mathop{5F{{e}^{2+}}}},+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4H_2O $ 5 time quantity of $ F{{e}^{2+}} $ consumed. So 5 time of $ FeSO_4 $ will be equivalent to 50 ml



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