1.

10 g sample of H_(2)O_(2) just decolorised 100 ml of 0.1 M KMnO_(4) in acidic medium % by mass of H_(2)O_(2) in the sample is

Answer»

`3.40`
`8.5`
`17.0`
`1.70`

SOLUTION :EQ. `H_(2)O_(2)` = Eq. `KMnO_(4)`
`(w)/(34)xx2=0.1xx0.1xx5impliesw=0.85gm`
implies % purity = `(0.85)/(10)xx100=8.5%`


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