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Q. When potassium permanganate is titrated against ferrous ammonium sulphate, the equivalent weight of ferrous ammonium sulphate is :

(a) M (b) M/2 (c) M/5 (d) M/3

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Solution

Dear Student,

KMnO4 when titrated with ferrous ammonium sulphate (Acidc Salt) gives the following changes 5Fe+2 + MnO4 5Fe+3 + Mn+2
The change in oxidation number of Fe = 1
t Hence equivalent wt ferrous amonium sulphate =M. wt./ Valency Factor=M/1
= M
Regards

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