Chemical Industries in Pakistan - Chapter No 19

Right Answers have been shown below in red color.

1. The chemical substances which are added to the land for the growth of plans, are called ________.

a) Fertilizers
b) Soils
c) Water
d) Sand

2. The elements required in a large amount for the process, are called.

a) Simple
b) Major
c) Natural
d) Synthetic

3. There are_______ main types of fertilizers.

a) Four
b) Five
c) Two
d) Six

4. Ammonia contains______ N2

a) 28%
b) 34%
c) 63%
d) 82%

5. Ammonia nitrate contains __________ N2.

a) 32 – 33.5%
b) 42 – 43.5%
c) 62 – 63.5%
d) 84 – 85.5%

6. When “NH3” react with “HNO3” then ______ reaction takes place.

a) NH3 + HNO3 → NH4 + NO3
b) NH3 + HNO3 → NH4NO3
c) NH4 + HNO3 → NH4+ + OH
d) None of these

7. Ammonium sulphate contains __________ N2

a) 21%
b) 12%
c) 34%
d) 43%

8. Ammonium sulphate contains __________ S.

a) 31%
b) 25%
c) 52%
d) 65%

9. 2NH3+H2SO4 → _______________.

a) NH4 (OH)3
b) (NH4)2(OH)3
c) (NH4)2 SO4
d) None of these

10. Urea contains__________ N2.

a) 46%
b) 64%
c) 12%
d) 96%

Chemical industries in pakistan - chapter no 19

a) C+ 3 H2O
b) CO2 + 4H2
c) CO+ 3 H2O
d) C+ 4H2O

12. 2NH3+ CO2 → __________.

a) NH2COONH4
b) CH3COONH2
c) NH3
d) CO2+ 4H2

13. Diammonium phosphate contains __________ N2.

a) 26%
b) 16%
c) 62%
d) 42%

14. Potassium chloride contains __________ potash.

a) 60-63%
b) 48-52%
c) 70-74%
d) 80-84%

15. The formula of potassium sulphate is ________________.

a) K2SO4
b) H3PO4
c) HCl
d) HNO3

16. K2SO4 contains__________ potash.

a) 68-82%
b) 48-52%
c) 78-84%
d) 90-95%

17. 2KCl +H2SO4 → _________.

a) K2SO4 + 2HCl
b) K2SO4 + 2H2O
c) K2SO4 + 4H2O
d) None of these

18. Glass is super cooled __________.

a) Liquid
b) Gas
c) Molecule
d) None of these

19. The main former of glass is.

a) Nitrogen
b) Plastic
c) Silica
d) Soda

19. The main former of glass is.

a) Nitrogen
b) Plastic
c) Silica
d) Soda

20. The example of vegetable fiber is.

a) Water
b) Cotton
c) Plastic
d) Soda

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