Question

Photosynthesis is categorised as a physico-chemical process because

• A. light energy is utilized to synthesise organic compounds
• B. organic compounds are utilised to obtain light energy
• C. organic compounds are utilised to obtain electrical energy
• D. light energy is utilised to produce nuclear energy

Answer 1

The correct option is A light energy is utilized to synthesise organic compounds

Light energy is defined as a kind of kinetic energy with the ability to make light visible to human eyes.
Electrical energy is defined as the energy emitted by virtue of flow of charge.
Both light and electricity are physical components involved in photosynthesis.

Plants obtain light energy from the sunlight (physical source) with the help of a pigment called chlorophyll during photosynthesis. This light energy is then utilized to produce complex organic (chemical) compounds. Hence it can be called a physico-chemical process.