These Surface Chemistry Important Questions (Catalysis) are useful for the students of NEET, AIIMS, JEE, and other entrance examinations.

Surface Chemistry Important Questions (Catalysis)

1. Which of the following decreases the rate of reactions?

a) Catalytic promoters

b) Homogeneous catalyst

c) Catalytic poison

d) Heterogeneous catalyst

Answer: Catalytic poison

2. Which of the following is used as a catalyst for the following reaction?

CH₃COOC₂H₅ + H₂O ——–> CH₃COOH + C₂H₅OH

a) Chlorine

b) Hydrochloric acid

c) Sulphuric acid

d) Nitrous acid

Answer: Hydrochloric acid

3. What is the amount of intermediate formed when initial amount is 300 and final amount is 700?

a) 400

b) 1000

c) 700

d) 300

Answer: 400

4. Which of the following statements is not correct?

a) The efficiency of a solid catalyst depends upon its surface area

b) Catalyst operates by providing alternate path for the reaction that involves a lower energy of activation

c) Catalyst lowers the energy of activation of the forward reaction without affecting the energy or activation of the backward reaction

d) Catalyst does not affect the overall enthalpy change of the reaction

Answer: Catalyst lowers the energy of activation of the forward reaction without affecting the energy or activation of the backward reaction

5. Which of the following statements is not correct?

a) Catalyst is not involved in the reaction

b) The concentration of a catalyst remains constant throughout the progress of chemical reaction

c) The mechanism of catalytic reactions may vary from reaction to reaction

d) NO acts as a homogenous catalyst in the oxidation of SO₂ to SO₃

Answer: Catalyst is not involved in the reaction

6. Which of the following does it increase the rate of catalyst?

a) Decreasing E_a

b) Increasing E_a

c) Increasing pressure

d) Increasing entropy

Answer: Decreasing E_a

7. Which of the following is present at the time of cracking of hydrocarbons?

a) Copper

b) Zeolite

c) Nickel

d) Molybdenum

Answer: Zeolite

8. How does a catalyst change during a reaction?

a) Physically

b) Mass-wise

c) Chemically

d) Quantitatively

Answer: Physically

9. Which of the following does not occur at the interface of phase?

a) Crystallisation

b) Heterogeneous catalysis

c) Homogeneous catalysis

d) Corrosion

Answer: Homogeneous catalysis

10. Promoter decreases the activity of catalyst.

a) True

b) False

Answer: False

Categories: Surface Chemistry