Question

Assertion (A): Reaction of quick lime with water is an exothermic reaction.

Reason (R): A large amount of heat is evolved on the reaction quick lime and water.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

Explanation:

Quicklime (CaO) reacts with water to form slaked lime (Ca(OH)₂).

\[\ce{CaO + H2O -> Ca(OH)2 + Heat}\]

A large amount of heat is released in this reaction. Therefore, it is an exothermic reaction. Hence, both the assertion and reason are true, and the reason correctly explains why the reaction is exothermic.