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JEE Main202310 Apr 2023Morning ShiftChemistryd and f Block ElementsActual

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

Options

  1. APrevent hydrolysis
  2. BPrevent reduction
  3. CPrevent breaking
  4. DPrevent oxidation

Correct answer

D. Prevent oxidation

Step-by-step solution

The formula for ferrous ammonium sulphate is FeSO 4 . ( NH 4 ) 2 SO 4 . 6 H 2 O . It is prepared by dissolving equimolar mixture of hydrated ferrous sulphate and ammonium sulphate in water containing a little sulphuric acid. The solution is subjected to crystallisation, ferrous ammonium sulphate separates out from the solution. The chemical reaction is given below. FeSO 4   +   ( NH 4 ) 2 SO 4   +   6 H 2 O   →   FeSO 4 . ( NH 4 ) 2 SO 4 . 6 H 2 O   ( Mohr ’ s   s

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