`H_2O_2` is reduced rapidly by `Sn^(2+). H_2O_2` is decomposed slowly at room temperature to yeild `O_2` and `H_2O_2`. `136g` of `10%` by mass of `H_2O_2` in water is treated with `100mL` of `3M Sn^(2+)` and then a mixture is allowed to stand until no further reaction occurs. The reactions involved are:
`2H^(o+)+H_(2)O_(2)+Sn^(2+)toSn^(4+)+2H_(2)`
`2H_(2)O_(2)to2H_(2)O+O_(2)`
The volume strength of `H_2O_2` left after reacting with `Sn^(2+)`

Options

A. `1.12 V`
B. `11.2 V`
C. `2.24 V`
D. `22.4 V`

Answer

B

Explanation

`1N` or `EqL^(-1)` of `H_(2)O_(2)=5.6` volume of `O_(2)` at `STP` (Volume strength of `H_(2)O_(2)`)
`implies N=0.2/100xx1000=2 EqL^(-1) of H_(2)O_(2)`
`=5.6xx2=11.2V`