Surface Chemistry Quiz - CBSE Class 11 Science

Free practice quiz: Surface Chemistry (CBSE Class 11 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 20 multiple-choice questions on Surface Chemistry, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is NOT a type of adsorption?

   1. Physical adsorption
   2. Chemical adsorption
   3. Desorption
   4. Absorption
   Show answer

   Answer: D. Absorption

   Absorption involves the substance being absorbed into the bulk of the material, while adsorption involves the substance sticking to the surface.

2. What is the term for the substance adsorbed onto a surface?

   1. Adsorbent
   2. Adsorbate
   3. Absorbent
   4. Absorbate
   Show answer

   Answer: B. Adsorbate

   The substance being adsorbed is called the adsorbate.

3. What is the Freundlich adsorption isotherm?

   1. A linear relationship between adsorption and pressure
   2. An exponential relationship between adsorption and pressure
   3. A logarithmic relationship between adsorption and pressure
   4. No relationship between adsorption and pressure
   Show answer

   Answer: C. A logarithmic relationship between adsorption and pressure

   The Freundlich isotherm describes the adsorption behavior using a logarithmic relationship.

4. What is a catalyst?

   1. A substance that increases the rate of a reaction without being consumed
   2. A substance that decreases the rate of a reaction without being consumed
   3. A substance that is consumed during a reaction
   4. A substance that has no effect on the rate of a reaction
   Show answer

   Answer: A. A substance that increases the rate of a reaction without being consumed

   A catalyst speeds up a reaction without being used up.

5. Explain the role of promoters in catalysis.

   1. Decrease the activity of the catalyst
   2. Increase the activity of the catalyst
   3. Have no effect on the catalyst
   4. Poison the catalyst
   Show answer

   Answer: B. Increase the activity of the catalyst

   Promoters enhance the catalytic activity.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the term for the increase in concentration of a substance at a surface?
2. Which type of adsorption involves weak van der Waals forces?
3. Which type of adsorption is irreversible?
4. What is the term for the surface onto which a substance is adsorbed?
5. Explain the difference between physisorption and chemisorption in terms of enthalpy change.
6. Which factors influence the extent of adsorption?
7. What is the Langmuir adsorption isotherm?
8. How does temperature affect physical adsorption?
9. How does temperature affect chemical adsorption?
10. Explain how surface area affects the rate of catalysis.
11. What is heterogeneous catalysis?
12. What is homogeneous catalysis?
13. Explain the role of poisons in catalysis.
14. Describe the mechanism of enzyme catalysis, including the formation of an enzyme-substrate complex.
15. Discuss the factors affecting enzyme activity, such as temperature, pH, and substrate concentration.

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