Question

Plants store solar energy in the form of:
A. Electric energy
B. Thermal energy
C. Chemical energy
D. Bio energy

Answer 1

Plants store solar energy in the form of energy which is the potential of a chemical substance to undergo a chemical reaction to convert into other substances. Plants convert this energy by the process of photosynthesis and this energy in the form of sugar is used as food.

Complete step by step answer
In green plants and other organisms the light energy gets converted into chemical energy this process is called photosynthesis. During this process of photosynthesis in green plants, light energy is trapped and it is used to convert water, carbon dioxide and minerals into oxygen and energy rich organic compounds that are carbohydrate or sugar.
Mostly in photosynthesis process, oxygen is also released as a waste product of the reaction. The plants, algae and cyanobacteria which perform the photosynthesis process are called photoautotrophs. Photosynthesis is also responsible for the production and management of the oxygen content of the Earth's atmosphere, and it supplies most of the energy necessary for life on Earth.
Reaction of photosynthesis process:
$C{O_2}\; + \;2{H_2}O\; + \;hv\; \to \;\left[ {C{H_2}O} \right]\; + \;{O_2}\; + \;{H_2}O$
Plants are able to make food from the carbon dioxide and water in the presence of sunlight. So, the plants store solar energy in the form of chemical energy and produce food in the form of carbohydrate and sugar.
Hence, option C is correct.

Note
Carbon dioxide is converted into sugars in this process is called carbon fixation. Photosynthesis processes energy from sunlight to convert carbon dioxide into carbohydrates. Carbon fixation is an endothermic redox reaction. Photosynthesis is the opposite of cellular respiration. As in photosynthesis reduction of carbon dioxide takes place to form carbohydrate but in cellular respiration oxidation of carbohydrate takes place to form carbon dioxide. In cellular respiration carbohydrates, amino acids and fatty acids are the nutrients used. The oxidation of these nutrients produce carbon dioxide and water and release chemical energy to drive the metabolism process of organisms.