What in an indicator? give an example.
Answers
Answer:
Indicators are chemical compounds that tell us whether a substance is acidic or basic by changing its colour. The indicators that are obtained from plants are known as natural indicators. A few examples of natural indicators are turmeric, China rose, red cabbage and grape juice.
Explanation:
Hope it will help you.
An indicator is a substance which changes its characteristic such as smell and color to indicate the presence of an acidic substance or a basic substance.
For example, litmus paper changes its color to red in acidic medium while it changes to blue in basic medium.
Indicators are of three types:
(a) Natural indicators- Indicators which are derived from natural sources. Such as turmeric, red cabbage, etc.
(b) Synthetic indicators- Indicators which are made by man in laboratories. Such as litmus paper, methyl orange, etc.
(c) Olfactory indicators- Indicators which change their color to indicate the presence of an acidic or basic medium. Such as onion extract, vanilla extract, etc.