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  9. Q2487

RRB Junior Engineer / DMS / CMA 2019 · Question 2487 of 3719

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified potassium permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the CORRECT explanation for the observation?

  1. APotassium permanganate is an unstable compound
  2. BFerrous sulphate acts as an oxidising agent and oxidises potassium permanganate
  3. CPotassium permanganate is an oxidising agent, it oxidises ferrous sulphateCorrect
  4. DThe colour disappears due to dilution

Answer: C. Potassium permanganate is an oxidising agent, it oxidises ferrous sulphate

Official answer key verified. Detailed explanation coming soon.

Source: RRB JE 2019 CBT-1 (29-May-2019 Shift 3) — cracku.in solved paper with answer key · reliable-secondary

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