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If the temperature of a reaction mixture rises without external heating, what type of reaction does this indicate?

Answer and explanation

Correct answer: Exothermic reaction

The governing concept is heat exchange during a chemical reaction. If the mixture becomes warmer without receiving heat from an external source, energy has been released by the reacting substances to their surroundings. Such a reaction is called exothermic, so option B is correct. An endothermic reaction absorbs heat, while photochemical and electrolytic reactions are classified by light or electricity, not simply by a temperature rise.

Related tags

ScienceClass10Chemical ReactionsExothermic ReactionsHeat ChangeChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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