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Class 10ScienceChemical Substances – Nature and BehaviourChemical Reactions and EquationsEasyLevel 4

A large amount of heat is released when water is added to calcium oxide. What type of reaction is this?

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Answer and explanation

Correct answer: Exothermic reaction

Calcium oxide reacts with water to form calcium hydroxide: \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\). Heat is released to the surroundings during this process, so it is an exothermic reaction. In contrast, an endothermic reaction absorbs heat from the surroundings.

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class 10 sciencechemical reactionsexothermic reactioncalcium oxidecalcium hydroxide

Frequently asked questions

What is the correct answer to this question?

Exothermic reaction

Why is this the correct answer?

Calcium oxide reacts with water to form calcium hydroxide: \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\). Heat is released to the surroundings during this process, so it is an exothermic reaction. In contrast, an endothermic reaction absorbs heat from the surroundings.

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.

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