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NCERTCBSE CHEMISTRY CLASS 12 CHAPTERWISE MCQ QUESTIONS

Welcome to your Unit 5: Surface Chemistry

1. 
Which one of the following is an example of adsorption?

2. 
Cottrell smoke precipitator works on the principle of:

3. 
Volume of one mole of any gas at NTP is

4. 
In Freundlich adsorption isotherm x/m = Kp1/n, the value of ‘n’ at low pressure is

5. 
According to adsorption theory of catalysis, the speed of the reaction increases because

6. 
Which of the following is a lyophobic colloid?

7. 
The nature of bonding forces in adsorption are

8. 
The protective power of a lyophilic sol is

9. 
Tyndall effect confirms the

10. 
Which one of the following is alyophilic colloid?

11. 
Which shape selective catalyst is used to convert alcohol to gasoline?

12. 
Milk is an example of

13. 
Lyophillic colloids are stable due to

14. 
An emulsifier is a substance which

15. 
Presence of traces of arsenious oxide (As2O3) in the reacting gases SO2 and O3 in presence of plantinised asbestos in contact process acts as

16. 
Peptization is a process of

17. 
The potential difference between the fixed charged layer and the diffused layer having opposite charge is called

18. 
The Tyndall effect associated with colloidal particles is due to

19. 
In the colloidal state the particle size ranges

20. 
The activity of an enzyme becomes ineffective

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