JEE · NEET Previous Year Question

During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the
following acid is added to prevent hydrolysis of ion? [NEET 2024]

Topic: NEET PYQ

Answer: D. Full step-by-step solution below.

  1. ADilute hydrochloric acid
  2. BConcentrated sulphuric acid
  3. CDilute nitric acid
  4. DDilute sulphuric acid

Correct answer: D

Solution

(d) Dilute does not act as an oxidising agent which prevent oxidation of into while concentrated will oxidise into .

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