JEE · NEET Previous Year Question

Which of the following statements is correct for the spontaneous adsorption of a gas?

Topic: NEET PYQ

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

  1. A is negative and, therefore should be highly positive.
  2. B is negative and therefore, should be highly negative.
  3. C is positive and therefore, should be negative.
  4. D is positive and therefore, should also be highly positive.

Correct answer: B

Solution

(b) Using Gibb’s‐Helmholtz equation,

During adsorption of a gas, entropy decreases i.e.
For spontaneous adsorption, should be negative, which is possible when is highly negative.

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