IMPORTANT ONE WORD ANSWER QUESTIONS SURFACE CHEMISTRY CLASS XII 2020

SURFACE CHEMISTRY CLASS XII
ONE WORD ANSWER QUESTIONS

Questions:
1.       Is adsorption exothermic or endothermic?
2.       Out of physisorption or chemisorption, which has higher enthalpy of adsorption?
3.       What name is given to the process of removal of adsorbed substance from the surface on which it is adsorbed?

      4.       Give an example of shape selective catalysts.

5.       Which gas acts as a catalytic poison in Haber's process?

6.       Name the substance that increases the activity of a catalyst.

7.       Which metal acts as a catalyst in Haber's process for manufacture of ammonia?

8.       Catalyst directs a reaction to yield a particular product. What is this ability of a catalyst  

       known as?

9.       What is the sign of AH and AS for adsorption process?

10.   Which enzyme is responsible for conversion of glucose into ethanol?

11.   Which enzyme is responsible for inversion of sugarcane?

12.   Give an example of a multi molecular colloid.

13.   Which process is responsible for delta formation?

14.   Is chemisorption reversible or irreversible?

15.   Which form of carbon acts as an excellent adsorbent?

16.   Precipitate can be converted into colloidal sol by shaking it with dispersion medium in  presence of small amount of electrolyte. Name the process.

17.   Give an example of emulsion.

      18.   Which process is responsible for cleansing action of soap?

19.   Name the process occurring on prolonged dialysis of a colloid.

20.   Name the temperature above which micelle formation takes place.

21.   What is zig- zag movement of colloidal particles known as?

22.   Give an example of oil in water type emulsion.

23.   A colloid contains a liquid dispersed in another liquid. Name the type of colloid.

24. Name an emulsifying agent, which is added to ice creams during their preparation.
25. Name a compound that can cause artificial rain.
26. Which phenomenon is used for the distinction of colloidal solution and true solution?

Answers:

      1. Exothermic    2. Chemisorpotion    3. Desorption     4. Zeolite     5. CO   6. Promoter  7.  Iron   8. Selectivity     9. Negative      10. Zymase    11. Invertase    12. Sulphur Sol13. Coagulation    14. Irreversible     15. Charcol     16. Peptization    17. Milk 18. Emulsification 19. Coagulation   20. Kraft Temperature    21. Brownian Motion 22. Milk  23. Emulsion 24. Gelatin    25. Silver Iodide   26. Tyndall Effect