Question

What volume (in ml) at `STP` of `SO_(2)` gas is oxidized by `100 ml` of `0.1 (M) H_(2)Cr_(2)O_(7)` in acid solution?
A. `672 ml`
B. `224 ml`
C. `448 ml`
D. `112 ml`

Answer 1

Correct Answer - A
`SO_(2) rarr SO_(4)^(2-) x-"factor"=2`
`Cr_(2)O_(7)^(2-) rarr Cr^(3+)x-"factor"=6`
Now `Vxx2=1000xx0.1xx6xx10^(-3)xx22400`
`V=(100xx0.1xx6xx10^(-3)xx22400)/(2)`
`(224x6)/(2)`
`=672 ml`