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20 ml of H(2)O(2) after acidification wi...

20 ml of `H_(2)O_(2)` after acidification with dil `H_(2)SO_(4)`, required 30 ml of N/2 `KMnO_(4)` for complete oxidation. Calculate the % of `H_(2)O_(2)` in gr/lit.

A

10.75 g/lit

B

11.75 g/lit

C

12.75 g/lit

D

13.75 g/lit

Text Solution

Verified by Experts

The correct Answer is:
C
Meq. of `O_(2)="Meq. of "H_(2)O_(2)="Meq. of "KMnO_(4)`
`(W times 1000)/(34//2)=1/2 times 30`
`W=1/2 times (300 times 17)/1000=0.255 gr//20ml`
`N_(H_(2)O_(2))=0.255/17 times 1000/20=0.75`
Strength `=0.75 times 17=12.75` gr/lit
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