The chemical reaction in which heat is absorbed is known as ______ reaction.

exothermic

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endothermic

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reversible

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spontaneous

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Solution

The correct option is C endothermic
Chemical reaction which proceeds via absorption of heat energy is called endothermic reaction. These reactions are non-spontaneous reactions in which energy is required to initiate the reaction. These reactions are characterized by the positive heat flow (heat energy flows into the reaction) and increase in enthalpy (greater than zero).
So, correct answer is option A.

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