1.

6.Substanceswhichindicatetheendpointoftitrationbytheircolourchangeareknownas-a)concentration,b)bases, c) acids, d) indicators.

Answer»

option D

Acid - Base indicators (also known as pH indicators) aresubstanceswhich change colour with pH. They are usually weak acids or bases, which when dissolved in water dissociate slightly and form ions.



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