Chemistry For HSC Part 2 - Chapter No.11 - MCQs and Fill In The Blanks

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Chapter No.11
Chemical Industries In Pakistan
Multiple Choice Questions - [MCQs]

1. Fertilizers maintain the pH of soil:
a) From pH 7 to 8 ✓
b) Above pH 10
c) Below pH 3
d) None of the these

2. Urea, Ammonia nitrate and ammonium sulphate are examples of:
a) Nitrogenous Fertilizers ✓
b) Potassic Fertilizers
c) Phosphatic Fertilizers
d) None of these

3. Urea is an excellent nitrogenous direr which contains nitrogen about:
a) 36%
b) 47% ✓
c) 80 %
d) 60%

4. The most commonly and widely used nitrogenous fertilizer in Pakistan is:
a) Nitrolin
b) Urea ✓
c) Ammonium Sulphate
d) Ammonium Nitrate

5. The phosphatic fertilizer obtained by mixing phosphorite with sulphuric acid in special chamber is called
a) Super Phosphate ✓
c) Di ammonium Phosphate
b) Triple Phosphate
d) None of these

6. Fertilizers that are derived from plants and animals are called:
a) Artificial Fertilizers
b) Natural Fertilizers ✓
c) Synthetic Fertilizers
d) None of the above

7. Artificial or Mineral fertilizers generally contain:
a) N, P or K ✓
b) C, H or 0
c) C, H or N
d) None of the these

8. Formula of Triple phosphate is:
a) Ca₃(PO₄)₂
b) Na(H₂PO₄)₂
c) 3Ca(H₂PO₄)₂✓
d) None of these

9. Which can be used in hard water effectively without any wastage in the form of scum:
a) Soap
b) Detergent ✓
c) None of these
d) Both of these

10. A transparent amorphous substance obtained by the fusion of various metallic silicates is called:
a) Plastic
b) Rayon
c) Glass✓
d) None of these

11. A glass which is a mixture of sodium silicate and calcium silicate is called:
a) Soda glass ✓
b) Pyrex glass
c) Lime glass
d) Coloured glass

12. The glass apparatus used in chemistry laboratory is made up of:
a) Soft glass
b) Lime glass
c) Flint glass
d) Pyrex glass ✓

13. Blue colour glass are made by adding:
a) Fe⁺⁺
b) Fe⁺⁺⁺
c) Co ✓
d) Ni

14. The best phosphatic fertilizer containing high % of assimilable P₂O₃ is:
a) Super Phosphate
b) Triple Phosphate ✓
c) Phosporite
d) None of these

15. Which is the better cleaning agent:
a) Soap
b) Detergent ✓
c) None of these
d) Both of these

16. The fibers obtained from cotton, jute, silk wool are called:
a) Artificial fibers
b) Synthetic fibers
c) Natural fibers ✓
d) Semi-synthetic fibers

17. Which is the naturally occurring polymer:
a) Polythene
b) PVC
c) Proteins ✓
d) Propylene

18. Which is not a natural polymer:
a) Silk
b) Wool
c) Leather
d) Nylon ✓

19. Which of the following is not a polymer:
a) Rubber
b) Cellulose
c) Fructose ✓
d) Protein

20. The monomer of PVC is:
a) Succinic acid
b) Vinyl chloride ✓
c) Propylene
d) Glycol

21. Teflon is a polymer of:
a) Polytetra fluoro ethylene ✓
c) Polytetra fluoro butylenes
b) Polytetra fluoro propylene
d) None of the these

22. The natural polymer among the following is:
a) Polyethylene
b) PVC
c) Teflon
d) Cellulose ✓

23. The substances added to soil to provide one or more nutrient elements essential for plant growth are called.
a) Fertilizers ✓
b) Salts
c) Minerals
d) Detergents

24. The percentage of Nitrogen in Ammonia is:
a) 18%
b) 45%
c) 65%
d) 82% ✓

25. Which are Sodium or Potassium salts of long chain fatty acids?
a) Fertilizers
b) Soap ✓
c) Detergents
d) Nylon

26. Boron oxide and Silica are the main constituents of:
a) Pyrex glass ✓
b) Soda-lime glass
c) Hard glass
d) Flint glass

27. Fertilizers maintain the pH of Soil at:
a) 7.0 - 8.0 ✓
b) 4.0 - 6.00
c) 1.2 - 42
d)12.0 - 14.0

28. Bakelite is formed by the combination of:
a) Phenol and Formaldehyde ✓
b) Phenol and Acetaldehyde
c) Benzene and Phenol
d) Benzene and Alcohol

29. The materials, which increase the mechanical strength of plastics and their resistance to fire, are celled:
a) Fillers ✓
b) Plasticizers
c) Pigments
d) Stabilizers.

30. The glass used in making electric bulbs is called:
a) Soda glass
b) Lime glass
c) Pyrex gloss
d) Flint glass. ✓

31. Which of the following is Thermosetting plastic?
a) Bakelite ✓
b) Polyethylene
c) Polystyrene
d) None of these.

Fill in the blanks:

1. The soil having pH above 10 or below 3 is sterile.
2. Phosphatic fertilizers accelerate fruit formation, gowth and development and increase resistance to diseases.
3. In water-based paints, solvent is water which carries a pigment or emulsion.
4. Fillers are inert, solid substances like China clay, talc, which are added to the paint to increase its durability.
5. Detergents are soapless cleaning agents.
6. Glass is a super-cooled liquid of artificial silicates.
7. Serious disadvantage of synthetic detergents is that they're not Biodegradable.
8. A type of plastic which softens on heating and becomes hard on cooling is thermoplastic.
9. PVC is manufactured by polymerization of vinyl chliride.
10. Terylene is mainly used in clothing and fishing lines.

True or False:

1. Thermosetting plastics become hard on heating. True
2. The widely used thinner for paints is Turpentine oil. True
3. Polyvinylchloride is a polymer, which is used in the manufacture" of chewing gum. False
4. The mixture of Sodium and Calcium silicates is called Nylon. False
5. Such substances which are not soaps by nature possess cleaning properties, are called detergents. True
6. Nylon is made by treating Hexamethylene diamine with Adipic acid. True
7. Plasticizers are the chemicals added to synthetic plastics to make them soft and flexible. True
8. Detergents cannot work in hard water.False
9. Soft glass is ordinary soda-lime silicate. True
10. Triple phosphate contains phosphorus nearly three time phosphate that of super phosphate. True