Sawaal
2
Q:

Which is an example of an endothermic reaction?

A) combustion B) mix of CaO with water
C) coal is burnt D) photosynthesis

Answer:   D) photosynthesis



Explanation:

A chemical reaction in which involves the absorption of heat from the environment is called a Endothermic reaction. 

Examples : Dissolving ammonium chloride in water, photosynthesis, melting ice cubes, mixing of potassium chloride with water,...

 

In the contrast, chemical reactions involving release of heat are known as exothermic reactions.

Examples : Combustion, coal is burnt, mix of CaO with water,...

Subject: General Science
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