Question

iv) ASSERTION : When calcium carbonate is heated, it decomposes to give calcium oxide and carbon
dioxide.
REASON
:The decomposition reaction takes place on application of heat, therefore, it is also said
to be an endothermic reaction. a) Both assertion and reason are true, reason is correct explanation of assertion.
b) Both assertion and reason are true but reason is not a correct explain the assertion.
c) Assertion is true but reason is false.
d) Assertion is false but reason is true.​

Answer 1

The correct answer is :

a) Both assertion and reason are true, reason is correct explanation of assertion.

This is because the reason correctly explains the assertion.

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Answer 2

Answer:

The correct option is (a) Both assertion and reason are true, reason is the correct explanation of assertion.

Explanation:

Assertion: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.

During the thermal decomposition of calcium carbonate, it breaks down to give quick lime $(CaO)$ and carbon dioxide $(CO_{2})$.

$CaCO_{3} +$Δ → $CaO+CO_{2}$

Reason: The decomposition reaction takes place on the application of heat, therefore, it is also said to be an endothermic reaction.

In the thermal decomposition of calcium carbonate, heat is given to break the bonds. When heat is taken in during a reaction, it is called an endothermic reaction.

Conclusion:

The assertion and reason are true and linked.