Question

1. What is an acid -base indicator ?gI've an example

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Answer 1

Answer:

indicator is used to know that the solution is acid or base

ex

extract of china rose

turmeric solution

phenolphthalein

litmus paper

Answer 2

Answer:

Acid and base indicator change their colour according to their PH.

Acid→

1) Phenolphthalein- colourless

2) Methyl orange- orange

3) Turmeric- yellow

Base→

1) Phenolphthalein- Pink

2) Methyl orange- yellow

3) Turmeric- red