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

Academic Chemistry NCERT Class 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.

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Updated on: 10-Oct-2022

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