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NEET2019ChemistryThermodynamics (C)Actual

In which case change in entropy is negative?

Options

  1. AEvaporation of water
  2. BExpansion of a gas at constant temperature
  3. CSublimation of solid to gas
  4. D2 H g → H 2 g

Correct answer

D. 2 H g → H 2 g

Step-by-step solution

In the change in entropy is negative, it implies that the system is getting ordered or organized. Among the given options, 2 H g → H 2 g Is leading to order as atom are combining to form molecules.

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