Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction

Options

(a) exothermic and increasing disorder
(b) exothermic and decreasing disorder
(c) endothermic and increasing disorder
(d) endothermic and decreasing disorder

Correct Answer:

exothermic and increasing disorder

Explanation:

For spontaneous reaction ΔH = -ve, ΔS = +ve. Spontaneity depends upon both critical minimum energy and maximum randomness / disorder.