12th Class Chemistry Mcqs With Answers Chapter 15| 2nd Year chemistry mcqs with answers pdf
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12th Class Chemistry Mcqs With Answers Chapter 1 | 12th Class Chemistry Mcqs With Answers Chapter 2 |
12th Class Chemistry Mcqs With Answers Chapter 3 | 12th Class Chemistry Mcqs With Answers Chapter 4 |
12th Class Chemistry Mcqs With Answers Chapter 5 | 12th Class Chemistry Mcqs With Answers Chapter 6 |
12th Class Chemistry Mcqs With Answers Chapter 7 | 12th Class Chemistry Mcqs With Answers Chapter 8 |
12th Class Chemistry Mcqs With Answers Chapter 9 | 12th Class Chemistry Mcqs With Answers Chapter 10 |
12th Class Chemistry Mcqs With Answers Chapter 11 | 12th Class Chemistry Mcqs With Answers Chapter 12 |
12th Class Chemistry Mcqs With Answers Chapter 13 | 12th Class Chemistry Mcqs With Answers Chapter 14 |
12th Class Chemistry Mcqs With Answers Chapter 15 | 12th Class Chemistry Mcqs With Answers Chapter 16 |
12th Class Chemistry Mcqs With Answers Chapter 17 | 12th Class Chemistry Mcqs With Answers Chapter 18 |
12th Class Chemistry Mcqs With Answers Chapter 19 | 12th Class Chemistry Mcqs With Answers Chapter 20 |
Chapter No 15
Common Chemical Industries In Pakistan
1. Which component, if present in paper causes brittleness choose which one is correct:
- Chlorine
- Cellulose
- Sodium hydroxide
- Lignin
2. Which of the following three elements are largely needed for healthy growth of plants choose which one is correct:
- N, P, S
- N, P, C
- N, P, K
- N, P, H
3. Nitrogen helps in choose which one is correct:
- Normal growth of plant
- Protein synthesis
- Nucleic acid synthesis
- All of above
4. The nutrients which are required in very small amount for growth of plants are called choose which one is correct:
- Nitrogenous fertilizers
- Micronutrients
- Macronutrients
- Surfactants
5. Which of the following element is not macro-nutrient choose which one is correct:
- B
- Ca
- S
- H
6. Which of the following is not micro-nutrient choose which one is correct:
- Fe
- Mn
- Cu
- H
7. Which of the following is not calcareous material choose which one is correct:
- Lime stone
- Marine shell
- Clay
- Marble
8. Which is not argillaceous material choose which one is correct:
- Lime stone
- Clay
- Slate
- None
9. The %age of nitrogen in NH4NO3 is choose which one is correct:
- 33 − 33.5%
- 30 − 33.5%
- 30 − 32.5%
- 31 − 32%
10. What is the main function of rotary kilin choose which one is correct:
- Heating lime stone
- Heating of clinker
- Drying of slurry
- Preparation of clinker
11. Which of the following process is alkaline choose which one is correct:
- Kraft process
- Sulphite process
- Neutral sulphite semi chemical process (NSSC)
- None
12. DAP contains P2O5 choose which one is correct:
- 48%
- 38%
- 68%
- 75%
13. Which of the following compounds is present in highest percentage in cement choose which one is correct:
- Lime
- Clay
- Na2O
- Alumina
14. Which fertilizer is widely used in Pakistan choose which one is correct:
- Urea
- KNO3
- DAP
- K2SO4
15. Which of the following fertilizers, contains 75% nutrient choose which one is correct:
- DAP
- TAP
- Urea
- NH4NO3
16. Which of the following is woody material choose which one is correct:
- Bamboo
- Poplar
- Bagasse
- Wheat straw
17. Which of the following is main process in paper industry choose which one is correct:
- Screening
- Bleaching
- Digestion
- Stock preparation
18. Which of the following bleaching agents is largely used for bleaching of pulp, in Pakistan choose which one is correct:
- O2
- O3
- ClO2
- Cl2
19. Micronutrients requirement (per acre) for the normal fertility of soil choose which one is correct:
- 4 − 10 g
- 6 − 200 kg
- 6 − 200 g
- None of above
20. The word paper is derived from reedy plant choose which one is correct:
- Papyrus
- Rose
- Acacia
- Papaya
21. The nutrients which are required in very small amount for growth of plants are called choose which one is correct:
- Nitrogenous fertilizers
- Micronutrient
- Macronutrient
- Surfactants
22. What is clinker choose which one is correct:
- Roasted calcareous material
- Roasted gypsum
- Roasted argillaceous
- Roasted calcareous and argillaceous material
23. Which one of the following is woody raw material used for making pulp and paper choose which one is correct:
- Eucalyptus
- Wheat straw
- Bagasse
- Cotton linter
24. Which of the following fertilizer is not useful for paddy rice choose which one is correct:
- DAP
- Ammonium sulphate
- Urea
- Ammonium nitrate
25. Which substance is used as filler or additive in paper making choose which one is correct:
- Cellulose
- Starch
- Lime
- Gypsum salt
26. Phosphorus helps the growth of choose which one is correct:
- Root
- Leave
- Stem
- Seed
27. Rotary kiln has how many zones choose which one is correct:
- 2
- 3
- 4
- 5
28. Which element is often present in all fertilizers choose which one is correct:
- Nitrogen
- Carbon
- Phosphorus
- Potassium
29. The %age of nitrogen in urea is choose which one is correct:
- 35%
- 46%
- 82%
- 75%
30. “Rock Phosphate” has composition of choose which one is correct:
- CaH3PO4
- Ca(H2PO4)2
- Ca3(PO4)2
- CaHPO4
31. Which one of the following is an organic fertilizers choose which one is correct:
- Manure
- Ammonium nitrate
- Urea
- Both A. and (c)
32. Which of the following cannot be used as phosphatic fertilizer choose which one is correct:
- CaH3PO4
- (NH4)2HPO4
- Ca3(PO4)2
- P2O5
33. Cement was introduced by a mason choose which one is correct:
- D-H Whore
- Humphry Davy
- Joseph Aspdin
- F. Wholer
34. The %age gypsum in the cement is choose which one is correct:
- 1 − 2%
- 2 − 3%
- 3 − 4%
- 4 − 5%
35. In the cement manufacture, the digestor revolves at R.P.M.
- 2
- 2.5
- 3.0
- 3.5