When 2.5g of a sample of Mohr's salt reacts completely with 50mL of `(N)/(10) KMnO_(4)` solution. The % purity of the sample of Mohr's salt is:

3.92g of ferrous ammonium sulphate (FAS) react completely with 50 mlN//10KMnO_(4) solution. The percentage purity of the sample is

A solution of 0.4 g sample of H_(2)O_(2) reacted with 0.632 g of KMnO_(4) in presence of sulphuric acid. The percentage purity of the sample of H_(2)O_(2) is :

The formula mass of Mohr's salt is 392. The iron present in it is oxidised by KMnO_(4) in acid medium. The equivalent mass of Mohr's salt is :