3.92 g of ferrous ammonium sulphate react N completely with \[50ml\fra – McqOptions

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1.	3.92 g of ferrous ammonium sulphate react N completely with \[50ml\frac{N}{10}KMn{{O}_{4}}\] solution. The percentage purity of the sample is
A.	50
B.	78.4
C.	80
D.	39.2
Answer» B. 78.4

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