Question

Olfactory indicators correct definition

Answer 1

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• Olfactory indicators are those substances which detect the presence of acid or base in a mixture.

• Their smell changes in acidic and basic mediums.

• Onions, clove oil and vanilla extract are some examples.

• Odour changes in basic medium while as it remains same in acidic medium.

• An acidic solution does not destroy the smell of the indicator.

• These indicators are based on the sense of smell.