${\mathrm{E}}^{\Theta }$ values of some redox couples are given below. On the basis of these values choose the correct option.

1. Cu will reduce Br-

2. Cu will reduce Ag

3. Cu will reduce I-

4. Cu will reduce Br2

Hint: High reduction potential substance is a good oxidising agent

The given values of $\mathrm{E}°$ are as follows:

The $\mathrm{E}°$ values show that copper will reduce Br2, if the $\mathrm{E}°$ of the following redox reaction is positive.

Since, $\mathrm{E}°$ of this reaction is positive, therefore, Cu can reduce Br2.

While other reaction will give negative value.