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Distinguish between an exothermic and an endothermic reaction. Amongst the following reactions, identify the exothermic and the endothermic reaction. 

(i) Heating coal in air to form carbon dioxide. 

(ii) Heating lime-stone in a lime kiln to form quick lime.

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Exothermic Reaction Endothermic Reaction
The reaction in which heat is released. The reaction in which heat is absorbed.

(i) Exothermic

(ii) Endothermic

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