0.1 M solution of `KMnO_(4)` (in acidic medium) may oxidies

Options

A. `0.25 M CO_(2)O_(4)^(-2)`
B. `0.8 M Fe^(+2)`
C. `0.1 M FeC_(2)O_(4)`
D. `0.6 M Cr_(2)O_(7)^(-2)`

Answer

A

Explanation

`MN_(4)^(-)toMn^(-2),v.f.=5`
`"no. of eq" =0.1xx5xx1=0.5`
Option
(1) `C_(2)O_(4)^(2-)toCO_(2),v.f.=1xx2=2`
`"no.f of eq"=0.25xx2xx1=0.5`
(2) `Fe^(2+)toFe^(3+),v.f.=1`
`"no.f of eq" = 0.8xx1xx1=0.8`
(3) `FeC_(2)O_(4)toFe^(3+)+CO_(2)`,
` v.f.=3,"no. of eq" =0.1xx3xx1=0.3`
(4) `Cr_(2)O_(7)^(2-)toCr^(=3)rArrv.f.=6`
`rArr"no. of eq" 0.6xx6xx1=3.6`