Question

A substance that changes it's colour when added to an acid or a base.pls answer fast​

Answer 1

Answer:

litemus paper changes ata colour

Answer 2

Answer:

Such substances are called indicators.

Explanation:

There are different types of indicators

1. natural indicators like- turmeric( red in basic medium and yellow in acidic) red cabbage(acid it is reddish pink and in basic bluish green or yellow)

2. Synthetic inficators- phenolphthalein ( pink in basic medium and colourless in acidic medium) methyl orange( red colour in acidic and yellow in basic)

3. Olfactory indicators (smell)- oninons( loose their smell in basic medium)