JEE · NEET Previous Year Question

For which among the following reactions, change in entropy is less than zero?

Topic: JEE PYQ

Answer: C. Full step-by-step solution below.

  1. ASublimation of iodine
  2. BDissociation of hydrogen
  3. CFormation of water
  4. DThermal decomposition of calcium carbonate

Correct answer: C

Solution

(c) :

Entropy of liquid is less than that of gases hence is negative for the formation of water.

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