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Spontaneous reactions that occur or mostly ________in nature.

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Spontaneous reactions that occur or mostly ________in nature.

(a) endothermic

(b) exothermic

(c) both endothermic and exothermic

(d) neither exothermic nor endothermic

The question was posed to me during an interview.

The above asked question is from Thermodynamics topic in chapter Thermodynamics of Chemistry – Class 11

1 Answer

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Correct choice is (b) exothermic

Explanation: All the processes which occur with a decrease of energy are exothermic in nature, those with change of enthalpy as negative occurs spontaneously. It is not true in case of some endothermic reactions, when they occur spontaneously.

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