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Which of the following is an example of physisorption?

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Question: Which of the following is an example of physisorption?

Options:

  1. Adsorption of hydrogen on palladium
  2. Adsorption of water on silica gel
  3. Adsorption of oxygen on activated charcoal
  4. Adsorption of ammonia on copper

Correct Answer: Adsorption of oxygen on activated charcoal

Solution: 

Physisorption involves weak van der Waals forces, and the adsorption of oxygen on activated charcoal is a classic example.

Which of the following is an example of physisorption?

Practice Questions

Q1
Which of the following is an example of physisorption?
  1. Adsorption of hydrogen on palladium
  2. Adsorption of water on silica gel
  3. Adsorption of oxygen on activated charcoal
  4. Adsorption of ammonia on copper

Questions & Step-by-Step Solutions

Which of the following is an example of physisorption?
Correct Answer: Oxygen on activated charcoal
  • Step 1: Understand what physisorption means. It is a type of adsorption where molecules stick to a surface through weak forces called van der Waals forces.
  • Step 2: Identify examples of physisorption. Look for cases where molecules are held to a surface without forming strong chemical bonds.
  • Step 3: Consider the example given: oxygen being adsorbed on activated charcoal. This is a classic case of physisorption because the interaction is weak.
  • Step 4: Confirm that the example fits the definition of physisorption by checking if it involves weak forces rather than strong chemical bonds.
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