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  9. Q12

RRB Technician (Grade I Signal + Grade III) 2024 · Question 12 of 1214

Which of the following is the olfactory indicator to check the acidic or basic nature of the substance?

Chemistry - indicators

  1. AVanilla essenceCorrect
  2. BPhenolphthalein
  3. CRed litmus
  4. DMethyl orange

Answer: A. Vanilla essence

Official answer key verified. Detailed explanation coming soon.

Source: RRB Technician Grade 3 GK Questions: 20 Dec, 2024 Shift 2 (testpaper.org compilation) · memory-based

← Q11View full paper (1214 questions)Q13 →

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