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Which one of the following can be used a...

Which one of the following can be used as an acid base indicator by a visually impared student ?

A

Litmus

B

Turmeric

C

Vanilla essence

D

Petunia leaves

Text Solution

Verified by Experts

The correct Answer is:
C
Vanilla essence can be used as an acid-base indicator by visually impaired students as it is an olfactory indicator whose odour changes in acidic or basic media.
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