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Question

25.0 g of FeSO4.7H2O was dissolved in water containing dilute H2SO4 and the volume was made up to 1.0 L. 25 mL of this solution required 20 mL of an N10 KMnO4 solution for complete oxidation. The percentage of FeSO4.7H2O in the acid solution is:

A
78%
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B
98%
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C
89%
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D
79%
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Solution

The correct option is C 89%
As given,
(WFeSO47H2O)×1000278/1=80
WFeSO47H2O=22.24
% of FeSO47H2O=22.2425×100%=88.96%

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