Reduction potentials of A, B, C and D are 0.8 V, 0.79 V, 0.34 and -2.37 V and respectively. Which element displaces all the other three elements?

Options

A. A
B. B
C. D
D. C

Explanation

To determine which element can displace all the other three elements based on their reduction potentials, we can follow these steps:

### Step 1: Understand Reduction Potentials
Reduction potential indicates the tendency of a species to gain electrons and be reduced. The higher the reduction potential, the greater the tendency to gain electrons.

### Step 2: List the Given Reduction Potentials
We have the following reduction potentials for elements A, B, C, and D:
- A: 0.8 V
- B: 0.79 V
- C: 0.34 V
- D: -2.37 V

### Step 3: Identify the Element with the Lowest Reduction Potential
Among the given potentials, D has the lowest reduction potential at -2.37 V. This means D has the least tendency to be reduced compared to the others.

### Step 4: Determine Displacement Ability
An element with a lower reduction potential can displace an element with a higher reduction potential. Therefore, since D has the lowest reduction potential, it can displace A, B, and C, which have higher reduction potentials.

### Conclusion
Element D, with a reduction potential of -2.37 V, can displace all the other three elements (A, B, and C).

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