Which one of the following can be used as an acid-base indicator by a visually impaired student?
  1. Litmus
  2. Turmeric
  3. Vanilla essence
  4. Petunia leaves

AcademicChemistryNCERTClass 10

Correct Answer: (c) Vanilla essence

Explanation:  Vanilla essence is an olfactory indicator hence it can be used as an acid-base indicator by visually impaired students.
raja
Updated on 10-Oct-2022 13:27:13

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