what is an indicator
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A chemical compound that changes color and structure when exposed to certain conditions and is therefore useful for chemical tests. Litmus, for example, is an indicator that becomes red in the presence of acids and blue in the presence of bases.
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Indicators are the dyes which produce different colours in acid and basic media.
There are 4 types of indicators.They are:
1. Natural indicators
2. Synthetic indicators
3. Olfactory indicators
4. Universal indicators
There are 4 types of indicators.They are:
1. Natural indicators
2. Synthetic indicators
3. Olfactory indicators
4. Universal indicators
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