Question

why onion is an olfactory indicator?​

Answer 1

Answer:

OLFACTORY INDICATORS:-

Onion and vanilla extract are olfactory indicators. Onion has a characteristics smell. The smell of onion is not detected when a basic solution like sodium hydroxide solution is been added to a cloth strip treated with onions (or onion extract).

Answer 2

Answer:

Onion and vanilla extract are olfactory indicators. Onion has a characteristics smell. The smell of onion is not detected when a basic solution like sodium hydroxide solution is been added to a cloth strip treated with onions (or onion extract).