Question

Peroxodisulphate salts, `(e.g., Na_(2)S_(2)O_(8))` are strong oxidizing agents used be bleaching agents for fats, oils, ets.
Given `:`
`O_(2)(g)+4H^(o+)(aq)+4e^(-)rarr 2H_(2)O(l)" "E^(c-)=1.23V`
`S_(2)O_(8)^(2-)(aq)+2e^(-)rarr 2SO_(4)^(2-)(aq)" "E^(C-)=2.01V`
Which of the following statement is `(` are `)` correct ?
A. Oxygen gas can oxidize sulphate ion to per-oxo disulphate ion `(S_2O_8^(-2))` in acidic solution.
B. `O_2(g)` is reduced to water
C. Water is oxidised to `O_2`
D. `S_2O_8^(-2)` ions are reduced to `SO_4^(-2)` ions.

Answer 1

Correct Answer - CD
Create a cell with required cell reaction
`O_2 +SO_4^(-)2 to S_2O_8^(-)2+H_2O " " E_(cell)^@=1.23-2.01 lt0`
`implies` Nonspontaneous cell reaction