Question

Question 8
Which of the following raw material is available in the air for photosynthesis?

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Hydrogen

Answer 1

The answer is option (b).

All these gasses are present in the air but only carbon dioxide is needed for photosynthesis. Photosynthesis is the process by which green plants prepare food from carbon dioxide and water in the presence of sunlight and chlorophyll. The prepared food is carbohydrate, which is stored as starch. Oxygen is also produced as a byproduct. The equation showing the process of photosynthesis is as follows:

Carbon dioxide + Water $\stackrel{Sunlight,Chlorophyll}{\to }$ Carbohydrate + Oxygen