Gujarat Board Class 12 Chemistry Sample Papers 2009

Sample Question Paper

Chemistry

Class – XII

Time : 3 hrs.                                                                            Maximum Marks : 80

Note : (i) All questions in Section A are compulsory
          (ii) Attempt only one out of three options in Section B, i.e., attempt either Part I or Part II or Part III in Section B.
         (iii) marks for each question are indicated against it.
         (iv) Use log tables if necessary.

1. Define composting.                                    1

2. List two points of differences between micro nutrients and macro nutrients.                1

3. What can be done to overcome the dangerous effects of modern agriculture?                1

4. Why do we need biological nitrogen fixation?                                                                   2

5. Define soil. List four major soil groups of India.                                                                2

6. Give the classification of pesticides based on target organisms.                                      3

7. Give two examples of polysaccharides.                                        1

8. Write two properties which are common to chemical catalysts and enzymes.                1

9. List two differences between enzymes and catalysts.                  1

10. Define lipids. List 3 different types of lipids.                                2

11. Why are fats a better source of energy than glucose?                    2

12. List 3 functions of DNA.                                                                 3

13. Define water pollution.                         1

14. Why is chlorination not the most desirable method of disinfecting polluted water?                    1

15. What are the effects of detergents on fresh water bodies?                                                         1

16. What are anthropogenic pollutants?. Give two examples each of primary and secondary pollutants.               2

Examples of primary pollutants : CO2, CO from burning of fuel; SO2 and oxides of nitrogen from vehicular combustion and thermal power station (any two)

Examples of secondary pollutants : SO3, H2SO4,NO2 (any two)

17. Why is it impossible for a nuclear reactor to blow up like a bomb? Explain.                                  2

18. How is global warming caused? List four consequences of green house effect.                            3