Quiz for Catalysis

Q1: Which of the following is a heterogeneous catalyst?

A. Fe in Haber process B. HCl in ester hydrolysis C. Pt in hydrogenation D. AlCl₃ in Friedel-Crafts reaction

Q2: Which is an example of enzyme catalysis?

A. MnO₂ in H₂O₂ decomposition B. Pt in alkene hydrogenation C. Zymase in fermentation D. FeCl₃ in chlorination

Q3: Catalysts alter the:

A. Enthalpy of reaction B. Activation energy C. Equilibrium constant D. Product

Q4: Which of the following is NOT a feature of a catalyst?

A. Unchanged after reaction B. Specific in action C. Initiates reaction D. Speeds up reaction

Q5: The term "promoter" in catalysis refers to:

A. A reactant B. A catalyst C. A substance that increases efficiency of catalyst D. A product

Q6: Which is an example of autocatalysis?

A. Decomposition of KClO₃ B. Reaction of oxalic acid and KMnO₄ C. Formation of ammonia D. Fermentation of sugar

Q7: Catalytic converter in vehicles uses:

A. Fe and Ni B. Pt and Rh C. Ag and Au D. Zn and Cu

Q8: Which of the following is a positive catalyst?

A. H₂O in hydrolysis B. MnO₂ in H₂O₂ decomposition C. Alcohol in esterification D. HCl in hydrolysis

Q9: A catalyst increases the rate by:

A. Decreasing ΔG B. Increasing product yield C. Lowering activation energy D. Changing mechanism

Q10: Which catalyst is used in the Contact process?

A. Pt B. Fe C. V₂O₅ D. Ni

Q11: Which process uses Fe as a catalyst?

A. Haber B. Ostwald C. Contact D. Hydrogenation

Q12: Which is an example of homogeneous catalysis?

A. SO₂ + O₂ in presence of NO B. N₂ + H₂ in presence of Fe C. H₂ + C₂H₄ in presence of Pt D. Decomposition of H₂O₂ by MnO₂

Q13: In catalytic reactions, the activation energy of the reaction:

A. Increases B. Decreases C. Becomes zero D. Remains same

Q14: Which is an example of negative catalysis?

A. MnO₂ in H₂O₂ B. Pt in hydrogenation C. Glycerol in H₂O₂ storage D. Fe in Haber process

Q15: Action of catalyst is explained by:

A. Collision theory B. Intermediate compound theory C. Quantum theory D. Thermal theory

Q16: What is the role of adsorbate in catalytic activity?

A. Initiates reaction B. Forms intermediate C. Binds to catalyst surface D. Removes catalyst

Q17: Colloidal catalysts are also known as:

A. True catalysts B. Enzymes C. Homogeneous catalysts D. Heterogeneous catalysts

Q18: Catalyst in hydrogenation of oils is:

A. V₂O₅ B. Fe C. Ni D. Ag

Q19: Enzymes are:

A. Proteins B. Carbohydrates C. Lipids D. Nucleic acids

Q20: Which of the following affects catalytic efficiency?

A. Surface area B. Boiling point C. Melting point D. Mass