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Solution


Q.

Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to               [2023]
1 prevent breaking  
2 prevent reduction  
3 prevent oxidation  
4 prevent hydrolysis  

Ans.

(3)

On prolonged heating some ferrous ions (Fe+2) oxidised to ferric ions (Fe+3). So in solution, ferrous ammonium sulphate present with some ferric ion (Fe+3) and therefore, prolonged heating avoided.