Which one of the following can be used as an | vedclass

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(A) An acid-base indicator that can be used by a visually impaired student is known as an olfactory indicator.Olfactory indicators are substances whos

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Vanilla essence

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(A) An acid-base indicator that can be used by a visually impaired student is known as an olfactory indicator.Olfactory indicators are substances whose smell changes in acidic or basic media.Vanilla essence is an olfactory indicator.In an acidic medium,the characteristic smell of vanilla essence is retained,whereas in a basic medium,the smell is destroyed.Turmeric,litmus,and petunia leaves are visual indicators that require sight to observe color changes.

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

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