Solution:
The above statement is true.The red litmus turns blue in basic medium. Litmus is a natural indicator. It is a purple-coloured dye solution which is extracted from a type of plant called lichen. It has a purple colour in water. If the drop of the given solution turns red litmus to blue, then the given solution will be essential (or a base). For example, a drop of baking soda solution turns red litmus paper to blue, so baking soda is basic. In general, red litmus contains a weak diprotic acid. Baking soda is sodium bicarbonate (). It is a base, which means that when mixed with water, it loses a negatively charged hydroxide ion (). It has a pH of about 8. Carbonic acid is volatile.
