Which among the following is an example of an exothermic reaction?
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
Combustion of petrol
Explanation:
An exothermic reaction is a chemical reaction in which energy (heat) is released to the surroundings. The combustion of petrol is an exothermic reaction because it releases a large amount of heat and light energy during burning.
In contrast, photosynthesis, melting of ice, and evaporation of water are endothermic processes as they absorb heat from the surroundings.
Key Points:
Exothermic reactions release heat energy.
Combustion of petrol releases energy.
It is a chemical reaction that produces heat and light.
Other options are endothermic or physical processes.
Additional Facts:
Combustion reactions are generally exothermic.
In photosynthesis, plants absorb solar energy.
Melting of ice and evaporation are physical changes.
Important Questions:
Q1: What is an exothermic reaction?
Ans: A reaction that releases heat energy.
Q2: Give an example of an exothermic reaction.
Ans: Combustion of petrol.
Q3: What type of process is photosynthesis?
Ans: Endothermic process.