Artificial and Natural indicators are the main two types of Chemical indicators. Another type of indicator includes Olfactory indicators. Litmus, red cabbage, turmeric, china rose are a number of the present indicators around us.

Acid and bases can be found everywhere in our daily life products. Let it be the lemon and vinegar (acids) we add to our eatables or the soap and bleach (bases) we use to wash our clothes with; there are countless examples of acids and bases around us.