(a) What is an acid-base indicator? Name the three common indicators used in chemistry laboratory.
(b) Name an acid-base indicator extracted from lichen.
(c) What colour does the methyl orange turn to when put in an acidic solution ?
Name one acid-base indicator.
Assertion: Phenolphthalein is an acid-base indicator. Reason: In an acid-base titration, this indicator is used.