Which of the following is an exothermic reaction a heating calcium carbonate B adding water to calcium oxide?
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ANSWER IS OPTION B
Adding water to calcium oxide is an exothermic reaction because a large amount of heat is released during this reaction
CaO + H2O-------------> Ca(OH)2 + Energy(Heat)
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OPTION A IS NOT ANSWER BECAUSE
we are providing heat for the reaction and giving energy for reaction in any form is called an endothermic reaction
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