Determine true statement for Zn-Cu electrochemical cell.
`[E_(Zn^(+2)|Zn)^(@)=-0.76V,E_(Cu|Cu^(+2))^(@)=-0.34V]`

Options

A. Zinc act at cathode and copper act as anode.
B. Conduction of electron from copper to zinc electrode.
C. Zinc act as anode and copper act as cathode.
D. Standard reduction potential of zinc is more than copper.

Answer

C

Explanation

`E_(Zn^(2+)|Zn)^(@)=-0.76V`
`E_(Cu|Cu^(2+))^(@)=-0.34V`
`E_(Cu^(2+)|Cu)^(@)=+0.34V`
So, `E_(Cu^(2+)|Cu)^(@) gt E_(Zn^(2+)|Zn)^(@)`.
So, they form electrochemical cell in which zinc act as anode and copper act as cathode.