The standard electrode potential of four metallic elements (A, B, C and D) are + 0.80, –0.76, + 0.12 and +0.34 V respectively. Arrange them in order of decreasing electropositive character

Explanation

To solve the problem of arranging the four metallic elements (A, B, C, and D) in order of decreasing electropositive character based on their standard electrode potentials, we can follow these steps:

### Step 1: Identify the standard electrode potentials
We are given the following standard electrode potentials for the elements:
- Element A: +0.80 V
- Element B: -0.76 V
- Element C: +0.12 V
- Element D: +0.34 V
...