Question

Photosynthesis is a
(1) Physico-chemical process
(2) Physical process
(3) Chemical process
(4) Catabolic process

Answer 1

The right answer is physico-chemical process.

Photosynthesis is indeed a physico-chemical process done by species which contains chlorophyll:

Physical, because it involves the absorption of sunlight as a source of energy.

Chemical, because it allows the transformation of carbon dioxide into glucose (which represents a source of chemical energy) and H2O into O2 through several successive reactions shematized below into a global reaction

solar energy + CO2 + H2O ==> O2 + C6H12O6

Answer 2

Answer: Physico chemical process

Explanation: Chlorophyll which is present in green leaves help to absorb sunlight. These green leaves prepare food for the plant in the presence of air, water and sunlight. This process of making food by the leaves using carbon dioxide, water and minerals with the help of sunlight is called photosynthesis.

Photosynthesis is the physicochemical process through which certain organisms like algae ,higher plants and bacteria use light energy to perform the synthesis of organic compounds.The solar energy which arises from the centre of the sun is the main driving force for the process of  photosynthesis.The mass gets transforms  into heat due to the fusion of hydrogen. When the heat energy reaches the sun’s surface, a small segment of it is converted into light energy. This is achieved through the the process of black body radiation. It is this light energy which is then absorbed by the plants on the earth’s surface. Then these photosynthetic organisms converts light to chemical energy through a chain of energy transducing reactions.