12th class (Fsc) Chemistry unit 7 MCQs
26. The total resources of pakistan are estimated by the geological survey of pakistan to be:
a. 164 billions tons
b. 124 billions tons
c. 184 billions tons
d. 144 billions tons
27. How much coal is used to bake bricks in limekilns?
a. 80%
b. 40%
c. 90%
d. 60%
28. What is tempratue rabge for the destructive distillation of coal?
a. 400-900oC
b. 300-800oC
c. 600-1000oC
d. 500-1000oC
29. Which one of the following is not the product of destructive distillation of coal?
a. Natural gas
b. Coke
c. Coal tar
d. Peat
30. In the first step of coal formation the wood of dead plants and animals is converted into:
a. Bituminous coal
b. Lignite
c. Anthracite
d. Peat
31. How much carbon is present in bituminous coal:
a. 75 to 79%
b. 85%
c. 95%
d. 65%
32. Fractional distillation of petroleum yields only about …… % gae of gasoline:
a. 20%
b. 70%
c. 40%
d. 10%
33. Petroleum ether is used as:
a. Heating fuel
b. Solvent
c. Lubrication
d. Motor fuel
34. The M.P of paraffin is:
a. 60-100
b. 20-60
c. 40-220
d. 50-60
35. The crude petroleum is separated in fractions by:
a. Steam distillation
b. Filtration
c. Fractional sublimation
d. Fractional distillation
36. In catalytic cracking, catalysts used:
a. SiO2and Cr2O3
b. SiO2and Al2O3
c. AI2O3 and Fe2O3
d. MnO2 and Cr2O3
37. In stream cracking the temperature is:
a. 700oC
b. 900oC
c. 600oC
d. 800oC
38. What is the oil refining capacity of Attock oil refinery?
a. 2.13 millions tons
b. 1.25 millions tons
c. 2.64 millions tons
d. 1.75 millions tons
39. Two oil refineries have been established at:
a. Multan
b. Peshawar
c. D.G Khan
d. Karachi
40. Pak Arab refinery is located Mahmud kot near:
a. Multan
b. Sindh
c. Peshawar
d. Baluchistan
41. What is the oil refining capacity of two oil refineries, Which have been established at Karachi?
a. 2.64 billions tons
b. 2.13 billions tons
c. 2.96 billions tons
d. 1.74 billions tons
42. The fraction C1-C4 obtained by fractional distillation of petroleum is known as:
a. Gasoline
b. Light naphtha
c. Gas oil
d. Natural gas
43. The boiling point range of gas oil or diesel oil is:
a. 250-400oC
b. 350-400oC
c. 300-400oC
d. 200-250oC
44. The fraction C5-C6 obtained by fractional distillation of petroleum is know as:
a. Gasoline
b. Petroleum ether
c. Lighroin
d. Kerosene
45. The boiling point range of Kerosene is:
a. 250-350oC
b. 150-275oC
c. 325-470oC
d. 175-325oC
46. The fraction C6-C7 obtained by fractional distillation of petroleum is know as:
a. Ligroin or light naphtha
b. Gasoline or petrol
c. Kerosene
d. Gas oil or diesel oil
47. The octane number of 100 % in petroleum:
a. neo-pentane
b. n-hexane
c. iso-octane
d. neo-octane
48. TEL is used as:
a. Anti-knocking agent
b. Freezing agent
c. Knocking agent
d. None
49. The compound that burns smoothly in an engine having octane number of 100 is:
a. 2,2,4 dimethyl hexane
b. 2.2.2 dimethyl butane
c. 2,2,4 dimethy hepanes
d. 2,2,4 trimethy pentane
50. The octane number 2,2,4- Trimethyl pentane is:
a. 80
b. 100
c. 70
d. 90