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50 ml of given H(2)O(2) solution is adde...

50 ml of given `H_(2)O_(2)` solution is added to excess KI solution in acidic medium. The liberated `I_(2)` requires 20 ml of 0.04 M standard Hypo solution.
Weight of `H_(2)O_(2)` present in 250 ml of given solution is

A

`0.034g`

B

`0.068g`

C

`0.136g`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
`2I^(-)+H_(2)O_(2)+2H^(+)rarr2H_(2)O+I_(2)`
`I_(2)+2S_(2)O_(3)^(-2)rarr2I^(-)+S_(4)O_(6)^(-2)`
`W_(H_(2)O_(2))=8xx10^(-3)xx(250)/(1000)xx34=0.068gm`
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