Multiple Choice Questions on Which one of the following is an example of endothermic reaction ........ for CAPF (AC) Exam Preparation

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Multiple Choice Questions

Which one of the following is an example of endothermic reaction ........

Everyday Science Chemistry
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    Which one of the following is an example of endothermic reaction?
    This questions was previously asked in
    CAPF 2021 Paper-1
    View All CAPF Previous Year Papers

    CaO(s) +H20(1) 

    Incorrect Answer

    CaCO3(s) →CaO(s)+CO2(g) 

    Correct Answer

    CaCO3(s) →+CO2(g) 

    Incorrect Answer

    CCO(s) →CaO(s)+CO2(g) 

    Incorrect Answer
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    Explanation:

    CaCO3(s) →CaO(s)+CO2(g) ,

    • Decomposition of calcium carbonate is endothermic reaction,CaCO3(s) → CaO(s) + CO2(g).
    • This is the thermal decomposition of limestone to calcium oxide(quick lime) and carbon dioxide on heating.
    • A thermal decomposition reaction requires energy to be supplied to the reactants in the form of heat.
    • So, in this reaction we have to supply energy in the form of heat that's why this reaction is endothermic reaction.

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