Question

explain the process of preparation of olfactory indicator using onion and a clean cloth?​

Answer 1

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An Acidic solution like Hydrochloric acid is added to the cloth strip does not destroy the smell of onions. when a basic solution like Sodium Hydroxide solution is added to a cloth strip treated with onion extract then the onion smell cannot be deleted.

Answer 2

Answer:

An Acidic solution like Hydrochloric acid is added to the cloth strip does not destroy the smell of onions. when a basic solution like Sodium Hydroxide solution is added to a cloth strip treated with onion extract then the onion smell cannot be deleted.