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# The value of $\Delta S$ is negative in which of the following process?

(a) Dissolution of sugar in water
(b) Stretching of rubber band
(c) Decomposition of lime stone
(d) Evaporation of water

In rubber the long flexible macromolecules coil up in a random way. When stretched, it gets uncoiled. The uncoiled arrangement has more specific geometry. Thus, the change in entropy ($\Delta S$) is negative.