Which gave difference according to smell

Those substances which change its smell on coming in contact with acid and base. For eg. Onion.

it is the indicator that produce small when we add acidic or basic solution to it
Olfactory indicator is tells us which are acidorbase by smelling and taste
Okk,sory don\’t be hyper
Its not theda….??
Itna bada aur theda name kon likhyega?
Tumhe aur sudhanshu ko prblm kya hai mere name se???
Mera name…anushika hai…
Ohh…yaan…..sorry….
Anshik garur nhi nose pe present….ho acid test krne me bhi use hota h?
??
Substance *
Detect smell
This indicator help us to detect sure stance through its smell
Kyaa baat haa???
Which detect smell and present in nose

Those substances which indicates the presence of acid and base by the smell called as olfactory indicator
Those substances whose smell(or odour) changes in acidic or basic solutions are called olfactory indicators.