Question

CO2 is returned to the atmosphere by all methods EXCEPT A) combustion. B) decomposition. C) photosynthesis. D) respiration.

Answer 1

Answer : The correct option is, (C) photosynthesis

Explanation :

Photosynthesis : It is a chemical process that occurs in the green plants. During photosynthesis process, carbon dioxide reacts with water in the presence of sunlight to gives glucose as a product and oxygen as a byproduct. In the photosynthesis reaction, carbon dioxide and water molecule are the reactants.

The balanced chemical reaction will be,

$6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+O_2$

Whereas the combustion , decomposition and respiration are the chemical reactions in which the carbon dioxide is produced as a product.

Hence, the correct option is, (C) photosynthesis

Answer 2

C: Photosynthesis is your Answer: