Question

define about indicator​

Answer 1

Answer:

Indicators are substances whose solutions change color due to changes in pH. These are called acid-base indicators. They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.

Explanation:

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Answer 2

Answer:

Indicator is a substance which tells whether something is acid or base by changing its colour and smell. Some indicators are litmus paper, phenolphthalein, methyl orange, pH.

Hope it helps you.