Among the following pairs of ions the lower oxidation state in aqueous solution is more stable than the other in

Options

A. `Ti^(+), TI^(3+)`
B. `Cu^(+), Cu^(2+)`
C. `Cr^(2+), Cr^(3+)`
D. `V^(2+), VO^(2+)`

Answer

A

Explanation

`+1` oxidation state of Tl is more stable than +3 oxidation state of Tl and thus `Tl^(3+)` converts into `Tl^(+)` ion causes oxidation to other (oxidizing agent).
`Tl^(3+) + 2e^(-) to underset("aqueous solution)")underset("(More stable in ")(Tl^(+))`