Question

natural indicator synthetic indicator or olfactory indicator ko kese pehchante h

Answer 1

Natural indicator ka best example Litmus hai...Litmus ke colour change ko observe karke we can find ki Yeh Natural Indicator hai..

Olfactory indicators when in contact to an acid or base give a characteristic smell...then we can identify them....

Synthetic indicator Phenolphthalein hai......which again becomes yellow in acid and colourless in base.

Answer 2

Heya folk...
:
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 other indicators do. For example onion, vanilla, clove, etc
Onion: Paste or juice of onion loses its smell when added with base. It does not change its smell with acid.
Vanilla: The smell of vanilla vanishes with base, but it’s smell does not vanishes with an acid...
:
A natural indicator is a naturalsubstance that can be used to determine the pH of another substance. Red Cabbage and grape juice are examples of natural indicators. A synthetic indicator is a man made chemical substances used to determine pH...
:
SYNTHETIC INDICATOR. An indicator prepared from artificial substances is known as synthetic indicator Examples are Phenolphthalein and Methyl Orange ....