Given `E_(Ag^(+)//Ag)^(@)=+0.80 V, E_(Cu^(2+)//Cu)^(@)=+0.34 V, E_(Fe^(3+)//Fe^(2+))^(@)=+0.76 V, E_(Ce^(4+)//Ce^(3+))^(@)=+1.60 V`
Which of the following statements is not correct ?

Options

A. `Fe^(3+)` does not oxidise `Ce^(3+)`.
B. Cu reduces `Ag^(+) ` to Ag.
C. Ag will reduce `Cu^(2+)` to Cu.
D. `Fe^(3+)` oxidises Cu to `Cu^(2+)`

Explanation

To solve the problem, we need to analyze the given standard reduction potentials and determine which statement is not correct based on these values.

### Given Data:
- \( E^\circ (Ag^+ / Ag) = +0.80 \, V \)
- \( E^\circ (Cu^{2+} / Cu) = +0.34 \, V \)
- \( E^\circ (Fe^{3+} / Fe^{2+}) = +0.76 \, V \)
- \( E^\circ (Ce^{4+} / Ce^{3+}) = +1.60 \, V \)

### Analyzing Each Statement:

1. **Statement 1**: \( Fe^{3+} \) does not oxidize \( Ce^{3+} \).
- **Analysis**: The reduction potential of \( Fe^{3+} \) to \( Fe^{2+} \) is \( +0.76 \, V \) and for \( Ce^{4+} \) to \( Ce^{3+} \) is \( +1.60 \, V \). Since \( 0.76 < 1.60 \), \( Fe^{3+} \) cannot oxidize \( Ce^{3+} \).
- **Conclusion**: This statement is **correct**.

2. **Statement 2**: \( Cu \) reduces \( Ag^+ \) to \( Ag \).
- **Analysis**: The reduction potential of \( Ag^+ \) to \( Ag \) is \( +0.80 \, V \) and for \( Cu^{2+} \) to \( Cu \) is \( +0.34 \, V \). Since \( 0.80 > 0.34 \), \( Cu \) can reduce \( Ag^+ \) to \( Ag \).
- **Conclusion**: This statement is **correct**.

3. **Statement 3**: \( Ag \) will reduce \( Cu^{2+} \) to \( Cu \).
- **Analysis**: The reduction potential of \( Ag^+ \) to \( Ag \) is \( +0.80 \, V \) and for \( Cu^{2+} \) to \( Cu \) is \( +0.34 \, V \). Since \( 0.80 > 0.34 \), \( Ag \) cannot reduce \( Cu^{2+} \) to \( Cu \) because \( Ag^+ \) has a higher reduction potential than \( Cu^{2+} \).
- **Conclusion**: This statement is **not correct**.

4. **Statement 4**: \( Fe^{3+} \) oxidizes \( Cu \) to \( Cu^{2+} \).
- **Analysis**: The reduction potential of \( Fe^{3+} \) to \( Fe^{2+} \) is \( +0.76 \, V \) and for \( Cu^{2+} \) to \( Cu \) is \( +0.34 \, V \). Since \( 0.76 > 0.34 \), \( Fe^{3+} \) can oxidize \( Cu \) to \( Cu^{2+} \).
- **Conclusion**: This statement is **correct**.

### Final Conclusion:
The statement that is **not correct** is **Statement 3**: \( Ag \) will reduce \( Cu^{2+} \) to \( Cu \).