What is the action of acidified potassium dichromate on ferrous sulphate `(FeSO_(4))` ?

Explanation

To determine the action of acidified potassium dichromate on ferrous sulfate (FeSO₄), we need to follow a systematic approach. Here’s a step-by-step solution:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Potassium dichromate (K₂Cr₂O₇) in acidic medium (usually sulfuric acid, H₂SO₄)
- Ferrous sulfate (FeSO₄)

### Step 2: Understand the Oxidation-Reduction Process
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