Introduction
- The taste of the food that we eat depends on the presence of acids and bases in them.
- Acids are sour in taste and change the colour of blue litmus to red.
- Bases are bitter in taste and change the colour of red litmus to blue.
- Litmus and turmeric are natural indicators. Some other examples of natural indicators are red cabbage leaves, and coloured petals of some flowers like hydrangea, petunia, and geranium.