Question

17. What is an olfactory indicator ? Name two olfactory indicators. What is the effect of adding sodium hydroxide
solution to these olfactory indicators

Answer 1

Answer:

Olfactory indicators are those indicators that help to identify whether the given solution is acidic or basic by changing their smell instead of colour as the other indicators do.

Olfactory indicators are based on the sensation of smell to identify the nature of the substance.

Onion and vanilla extract are olfactory indicators

The characteristic smell of an olfactory indicator is lost when it is added to a sodium hydroxide solution

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