Assertion : The enthalpy change for the reaction `CaO_((s))+CO_(2(g)) rarr CaCO_(3(s))` is calld enthalpy of formation of calcium carbonate. Reason : The reaction involves formation of 1 mole of `CaCO_(3)` from its constituent elements.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is false.D. If both assertion and reason are false.

Assertion : The enthalpy change for the reaction `CaO_((s))+CO_(2(g))

1.	Assertion : The enthalpy change for the reaction `CaO_((s))+CO_(2(g)) rarr CaCO_(3(s))` is calld enthalpy of formation of calcium carbonate. Reason : The reaction involves formation of 1 mole of `CaCO_(3)` from its constituent elements.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is false.D. If both assertion and reason are false.
Answer» Correct Answer - D The enthalpy change for the given reaction is not an enthalpy of formation of calcium carbonate, since `CaCO_(3)` has been formed from other compounds, and not from its constituent elements.

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