Which one among the following is an example of endothermic process ?

Which one among the following is an example of endothermic process ?

Combustion of carbon
Mixing acid and alkali
Photosynthesis
Respiration
This question was previously asked in
UPSC CAPF – 2024
The correct option is C. Photosynthesis is an example of an endothermic process because it requires energy input (light energy) from the surroundings to proceed.
– An endothermic process absorbs heat or energy from the surroundings. The temperature of the surroundings typically decreases.
– An exothermic process releases heat or energy into the surroundings. The temperature of the surroundings typically increases.
– Photosynthesis converts light energy into chemical energy stored in glucose: $6\text{CO}_2 + 6\text{H}_2\text{O} + \text{Light Energy} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2$.
Combustion of carbon, mixing acid and alkali (neutralization), and respiration are all exothermic processes, releasing energy.
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