Question

a. Define olfactory indicators name two substances which can used as olfactory indicators b. choose strong acid from the following CH3 COOH ,H2SO4 , H2CO3 , HNO3​

Answer 1

Olfactory indicators are the organ which can indicate smell.

Onion,Clove Oil and Vanilla extract can be used as an olfactory indicators

I think the strongest acid is HNO3

Answer 2

a) Indicators which show change in odour in acidic or basic medium is called olfactory Indicators. Example :- Vanilla essence, clove oil, etc.

b) Strong acids :- H2SO4 and HNO3