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RRB Junior Engineer / DMS / CMA 2019 · Question 3582 of 3719

The gases obtained on heating FeSO 4are-

  1. ABoth SO 2and SO 3Correct
  2. BH 2S
  3. CSO 2
  4. DSO 3

Answer: A. Both SO 2and SO 3

Explanation

Explanation : Ferrous sulphate crystals contain water of crystallisation (FeSO 4.7H 2O). On heating, ferrous sulphate crystals lose water. FeSO 4 .7H 2 O (Light Green) → FeSO 4 (White) + 7 H 2O The colour changes from light green to white due to the formation of anhydrous ferrous sulphate (FeSO 4). After further heating ferrous sulphate, it gives ferric oxide ,sulphur dioxide and sulphur trioxide . FeSO 4→ Fe 2O 3+ SO 2+ SO 3

Source: RRB JE 2019 (CBT 2) (IT) Previous Year Paper (30 Aug 2019) — prepp.in solved-paper PDF (answer key with explanations) · reliable-secondary

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