Write definition on indicator
Answers
Answer:
the substance used to differentiate between acid and base is called indicator
1) A thing that indicates the state or level of something.
‘car ownership is frequently used as an indicator of affluence’
1.1) An animal or plant species that can be used to infer conditions in a particular habitat.
‘the raccoon is a poor choice as an indicator of riparian habitat’
2) usually with modifier A gauge or meter of a specified kind.
‘a speed indicator’
‘an altitude indicator’
2.1) British A flashing light or (formerly) other device on a vehicle to show that it is about to change lanes or turn.
North American term turn signal
as modifier ‘an indicator light’
North American term turn signal
2.2) British A board or screen in a railway station, airport, etc. giving current information.
as modifier ‘the indicator board’
3) Chemistry
A compound that changes colour at a specific pH value or in the presence of a particular substance, and can be used to monitor acidity, alkalinity, or the progress of a reaction.
‘the remaining alkali is titrated against standard acid using phenolphthalein as indicator’