In which metal vessels aqueous `CuSO_(4)` solution can be store ?
`E_(Cu^(2+)//Cu)^(@)=0.34V`
`E_(Fe//Fe^(2))^(@)=0.44V, E_(Al//Al^(3+))^(@)=1.66V`
`E_(Ni//Ni^(2+))^(@)=0.25V,E_(Ag^(+)//Ag)^(@)=0.80V`

Options

A. Ag
B. Ni
C. Fe
D. Al

Answer

B

Explanation

`E_(Cu^(2+)|Cu)^(Theta)=0.34V`
`E_(Al|Al^(3+))^(Theta)=1.66V and E_(Al^(3+)|Al)^(Theta)=-1.66V`
So, in Al vessels, `Cu^(2+)` of `CuSO_(4)` is reacted.
`2Al_((S))+3Cu^(2+) to 2Al^(3+)+3Cu_((S))`
So reaction of `CuSO_(4)` is occurred with Al vessels so `CuSO_(4)` solution can.t be store in Al.