Question 43

Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to

Name: Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to
Uploaded: 2026-07-02T11:50:33.467875+05:30
Duration: 49 s
Description: Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to

Solution

During the preparation of ferrous ammonium sulphate (Mohr's salt, FeSO₄·(NH₄)₂SO₄·6H₂O), prolonged heating is avoided.

This is because Fe²⁺ ions are easily oxidized to Fe³⁺ ions when heated in the presence of air and water. Prolonged heating would cause oxidation of ferrous (Fe²⁺) to ferric (Fe³⁺) ions, which would contaminate the product.

The correct answer is Option 4: Prevent oxidation.