In a chemical reaction, both heat and light are released. What type of reaction is it?
Answer and explanation
Correct answer: Exothermic reaction
The governing concept is the direction of energy transfer. In an exothermic reaction, the chemical system releases energy to its surroundings; that energy may appear as heat and, in some reactions, as light. Because both heat and light are released here, option A is correct. An endothermic reaction absorbs energy, while displacement and double-displacement describe reactant replacement patterns, not necessarily whether heat or light is released.
Frequently asked questions
What is the correct answer to this question?
Exothermic reaction
Why is this the correct answer?
The governing concept is the direction of energy transfer. In an exothermic reaction, the chemical system releases energy to its surroundings; that energy may appear as heat and, in some reactions, as light. Because both heat and light are released here, option A is correct. An endothermic reaction absorbs energy, while displacement and double-displacement describe reactant replacement patterns, not necessarily whether heat or light is released.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
