CHAPTER 15
COMMON CHEMICAL INDUSTRIES IN PAKISTAN 1. The percentage of nitrogen in NH3 is: (a) 46% (b) 60% (c) 82% (d) 100%
2. Potassium fertilizers are useful for: (a) Tobacco (b) Coffee (c) Potato (d) all of these
3. Which one of the following raw materials is not used in the cement manufacture: (a) Lime stone (b) Gypsum (c) Blast furnace slag (d) Lead
4. White water is: (a) Hard water (b) Water obtained from a crystal by heating (c) Water which is obtained from pulp, through screen at Fourdrinier table (d) Water which is removed from amino acids when they from peptide bond
5. The % of Nitrogen in Ammonium Nitrate is: (a) 46% (b) 82% (c) 33% (d) 16%
6. Which is not a calcareous material? (a) lime (b) clay (c) marble (d) marine shell
7. The nitrogenous fertilizer easily taken up by plants is: (a) Urea (b) Ammonium nitrate (c) Ammonia gas (d) Ammonia solution
8. Ammonium nitrate fertilizer is not used for which crops? (a) Cotton (b) Wheat (c) Sugarcane (d) Paddy rice
9. Point out raw material which is most suitable for manufacturing of urea: (a) CO2, N2, H2 (b) N2, H2, CO (c) CH4, N2, H2 (d) H2, N2
10. Which one of the following fertilizers has maximum manufacturing plants in Pakistan: (a) Urea (b) Ammonia (c) Ammonium phosphate (d) Ammonium nitrate
11. Phosphorous helps the growth of: (a) Root (b) Leave (c) Stem (d) Seed
12. Which of the following nitrogen fertilizer contains more nitrogen: (a) NaNO3 (b) KNO3 (c) NH4NO3 (d) Urea
13. Urea contains about (a) 48% Nitrogen (b) 46% Nitrogen (c) 44% Nitrogen (d) 42% Nitrogen
14. Potassium nitrate is prepared by direct reaction between potassium chloride and (a) Nitric acid (b) Nitrosyl chloride (c) Sodium nitrate (d) Nitrate ions
15. The total production of urea fertilizer in Pakistan is: (a) 56,20,10 metric tons /annum (b) 56,25,100 metric tons/ annum (c) 56, 23,100 metric tons/annum (d) 56, 30,100 metric tons /annum
16. For Chemical pulping, the principal methods used are: (a) Five (b) Four (c) Three (d) Two
17. During setting of cement, Tricalcium silicate and tri-calcium aluminate are get hydrolyzed to produce calcium hydroxide and (a) Ca(OH)2.2H2O (b) CaCO3.2H2O (c) Al(OH)3 (d) CaCO2
18. For manufacture of Portland cement main materials are: (a) Lime and Silica (b) Alumina and Magnesia (c) Silica and FeO (d) Clay and Shale
19. In cement manufacture, 75% Lime stone is used to get: (a) 62% Lime (b) 60% Lime (c) 75% Lime (d) None
20. The natural fertilizer is called: (a) Manure (b) Urea (c) Super phosphate (d) Ammonium sulphate
21. Which of the following elements is not a micro nutrient?. co (a) Cu (b) Fe (c) Mg (d) Mo
22. Macronutrients are required for an acre of land in quantity ranging from: (a) 2-200Kg (b) 3-200Kg (c) 4-200Kg (d) y5-200Kg
23. Calendar stock is the stage of paper making where? (a) Paper is stored (b) Thickness is reduced (c) water is removed (d) Stock is reduced to 1%
24. Which non-woody raw material is used for making pulp and paper? (a) Fur (b) Rice/wheat straw (c) Eucalyptus (d) Poplar
25. The hottest zone in rotary kiln is: (a) Drying (b) Pre-heating (c) Burning (d) Decomposition
26. Which sequence of steps are correct for the manufacture of cement? (a) Mixing, heating, grinding, crushing (b) Crushing, heating, mixing, grinding (c) Crushing, heating, mixing, grinding (d) Crushing, grinding, mixing, heating
27. It is not used in paper and pulp industry: (a) Bamboo (b) Cotton stalk (c) Poplar (d) He gas
28. A manure is: (a) An organic compound (b) An inorganic compound (c) A mixture of organic and inorganic compounds (d) A mixture of inorganic compounds
29. The fertilizer that contains largest amount of nitrogen nutrient is: (a) Liquid nitrogen (b) Urea (c) Liquid ammonia (d) Ammonium nitrate
30. Argillaceous material in the following is: (a) Lime (b) Clay (c) Marble (d) Marine shell
31. Which substance in cement has greater percentage? (a) Silica (SiO2) (b) Lime (CaO) (c) Iron Oxide (Fe2O3) (d) Alumina (Al2O3) 32. Which one is an organic fertilizer: (a) Manure (b) Ammonium nitrate (c) Urea (d) both a & c
33. Which one is a micronutrient? (a) Boron (b) Nitrogen (c) Phosphorous (d) Potassium
34. The fertilizer which contains 46% nitrogen is: (a) Urea (b) Ammonia (c) Ammonium nitrate (d) none of these
35. Argillaceous material used for the manufacture of cement provides (a) Basic components (b) Amphoteric compounds (c) Acidic components (d) both acidic and basic component
36. Diammonium Phosphate contains: (a) 18% Nitrogen (b) 48% P2O5 (c) 88% plant nutrients (d) 10% Nitrogen
37. The % of lime (CaO) in Portland cement is: (a) 1.0 (b) 2.5 (c) 62.0 (d) 60.0
38. The % of gypsum in Portland cement is: (a) 4-5% (b) 9-4% (c) 2-3% (d) 1-2%
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Chemistry