Multiple choice

In which of the following processes is the phenomenon of heat evolution not observed?

  1. Respiration

  2. Combustion

  3. Friction

  4. Photosynthesis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photosynthesis is the process by which green plants prepare their own food. In this process, heat energy is trapped by chlorophyll for the conversion of raw material into carbohydrate.

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