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NEET 2019
Exam
NEET
Year
2019
Subject
Chemistry
Chapter
Thermodynamics (C)

NEET 2019 · Chemistry · Thermodynamics (C)

In which case change in entropy is negative?

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. D2H(g)→H2(g)2H\left(g\right) \to {H}_{2}\left(g\right)

Correct answer

D. 2H(g)→H2(g)2H\left(g\right) \to {H}_{2}\left(g\right)

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, 2H(g)→H2(g)2H\left(g\right) \to {H}_{2}\left(g\right)

Is leading to order as atom are combining to form molecules.

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