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  9. Q301

RRB Group D (Level-1 posts) 2025 · Question 301 of 386

Which statement best describes an olfactory indicator?

  1. AA substance that changes smell in acids and basesCorrect
  2. BA liquid that changes colour in all solutions
  3. CA gas that reacts only with strong acids
  4. DA solid that dissolves in both acids and bases

Answer: A. A substance that changes smell in acids and bases

Official answer key verified. Detailed explanation coming soon.

Source: RRB Group D 2024 Question Paper PDF (Dec 27, 2025) (Shift 2) · official-answer-key

← Q300View full paper (386 questions)Q302 →

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