ENGINEERING CHEMISTRY-UNIT II: SURFACE CHEMISTRY AND CATALYSIS

21 flashcards · Other · by Saravanan Arjunan

1. The term ‘sorption’ stands for?

   Both adsorption and absorption

2. Substance is homogeneously distributed throughout the body is known as

   Absorption

3. Adsorption is a

   bulk phenomenon

4. Chemisorption is mainly caused by

   Covalent bond

5. In Freundlich’s Adsorption isotherm, the value of 1/n is

   0 to 1

6. Which type of the catalysis can be described by the adsorption theory?

   Heterogeneous catalysis

7. Which catalyst is used for hydrogenation of ethylene?

   Ni

8. Promoters raise the spaces between the catalyst particles, as a result adsorbed molecules are

   Weakened and cleaved

9. A catalyst increases the rate of the chemical reaction, this process is known as

   Positive Catalyst

10. Oxidation of SO2 to SO3 in the presence NO. This is an example of?

    Homogeneous catalysis

11. Catalyst and substances are present in different phase, the name of process called as

    Heterogeneous catalysis

12. The following reaction is an example of

    Heterogeneous catalysis with liquid reactants

13. Which catalyst is used for the following reaction?

    AlCl3

14. What is the correct role of substances in the system of catalytic poisoning

    Destroy the activity of the catalyst

15. Which product is manufacturing through Haber’s process?

    Ammonia

16. The rate of the reaction in promoters are

    Increases

17. The below reaction is an example of CH3COOH + H2O → CH3COOH + C2H5OH

    Autocatalysis

18. Which catalyst is not suited for acid catalysis reaction?

    OH- and NH4OH

19. Which catalyst is primary used for cracking of hydrocarbons?

    Zeolites

20. Which kind of metals were coated in catalytic converter?

    Rh, Pt and Pd

21. In Michaelis-menten equation, concentration of substrate is higher than Km, so the rate of the reaction is

    Zero order