Each of the following redox reaction occurs spontaneously.
`Zn(s)+Cu^(2+)(aq)rarrZn^(2+)(aq)+Cu(s)`
Arrange with explanation Zn,Cu in order of their decreasing standard reduction potential.

Explanation

Here `Zn` is oxidised and `Cu^(2+)` is reduced. Hence `E_(Zn^(+)|Zn)^(@) lt E_(Cu^(2+)|Cu)^(@)`.