Question

The difference between an exothermic chemical reaction and an endothermic one is that one releases energy while the other uses energy. Which of the following is not an example of an exothermic reaction?

• A. Burning a log
• B. Water freezing into ice
• C. Photosynthesis
• D. Burning of sugar in the body

Answer 1

The correct option is C Photosynthesis

Photosynthesis is considered to be an “endothermic reaction” because it absorbs the sun's energy to enable the reaction to happen. Like most of the endothermic reactions, the plants do not absorb heat but they absorb sun's photothermal energy to perform 'photosynthesis' in order to produce starch.