Arrange the following metals in the order in which they displace easy other from the solution of their salts. `Al, Cu, Fe, Mg, ` and `Zn`.

Options

A. Cu, Fe, Zn, Al, Mg
B. Fe, Zn, Cu, Al, Mg
C. Mg, Cu, Fe, Zn, Al
D. Mg, Al, Zn, Fe, Cu

Explanation

To arrange the metals Al, Cu, Fe, Mg, and Zn in the order of their ability to displace each other from the solution of their salts, we need to refer to their standard reduction potentials. The metal with a lower reduction potential can displace a metal with a higher reduction potential from its salt solution.

### Step-by-Step Solution:

1. **Identify the Standard Reduction Potentials**:
- The standard reduction potentials for the given metals are approximately as follows:
- Mg: -2.37 V
- Al: -1.66 V
- Zn: -0.76 V
- Fe: -0.44 V
- Cu: +0.34 V

2. **Arrange the Metals by Reduction Potential**:
- From the values above, we can see that:
- Mg has the lowest reduction potential (-2.37 V), making it the most reactive.
- Al is next (-1.66 V).
- Zn follows (-0.76 V).
- Fe comes next (-0.44 V).
- Cu has the highest reduction potential (+0.34 V), making it the least reactive.

3. **Order of Displacement**:
- The order in which these metals can displace each other from their salt solutions, starting from the most reactive to the least reactive, is:
- Mg > Al > Zn > Fe > Cu

4. **Final Arrangement**:
- Therefore, the final arrangement of the metals in the order of their ability to displace each other from their salt solutions is:
- **Mg, Al, Zn, Fe, Cu**