1. Petroleum is a mixture of … with smaller amounts of aromatic hydrocarbons.
a. alkanes and alkenes
b. alkanes and cycloalkanes
c. alkenes and cycloalkanes
d. alkynes and alkenes
e. alkynes and alkanes
2. Petroleum can be classified as mixture of ….
b. aliphatic hydrocarbon
c. aromatic hydrocarbon
d. aliphatic and alisiclic hydrocarbon
e. aliphatic ans aromatic hydrocarbon
3. The method used to separate the components of petroleum is named ….
b. fractional destilation
d. fractional heating
4. The wrong information about fossil fuels is ….
a. the principal sources of hydrocarbons
b. can form as natural gas, petroleum, and coal
c. it is separated by distillation into fractions such as biogas V
d. natural gas is mainly methane with smaller amounts of the other gaseous alkanes
e. petroleum is a mixture of alkanes and cycloalkanes with smaller amounts of aromatic hydrocarbons
5. Natural gas and petroleum, which are mixtures of hydrocarbons, are the major sources of organic chemicals. By various reactions, the hydrocarbons in natural gas and petroleum are converted to final products, such as ….
6. Crude oil is separated into different fractions with different boiling points and composition by fractional distillation. The wrong answer about these fractions is ….
a. Gas C1 – C5 gas cookers
b. Gasoline C5 – C10 combustion engines
c. Kerosene C11 – C14 roofing
d. light gas-oil C13 – C17 diesel engines
e. heavy gas-oil C18 – C25 lubricants
7. Petroleum can be separated into petroleum fraction by fractional distillation because the fraction …..
a. are miscible
b. have different viscosities
c. have different boiling point
d. have similar chemical properties
e. have different freezing point
8. Fraction distillation of a sample of cruide oil produce the fraction . The boiling point of the fraction are given below. Which fraction has the biggest molecules?
Fraction Approximate boling points (oC)
A 20 - 40
B 40 – 120
C 120 – 160
D 160 – 250
E Above 250
9. Which one of the following hydrocarbons would you expect to find in petroleum gas ?
10. One of the following compounds that might be found in kerosene is ….
a. n- nonane
11. Fractional distillation can be used to separate crude into kerosene, diesel oil, lubricating oil and petrol. What is the correct order of their boiling points ?.
Lowest boiling point Highest boiling point
A Lubri-cating oil Kero-sene Diesel Lubri-cating oil
B Kero-sene Diesel Lubri-cating oil Petrol
C Diesel Kero-sene Lubri-cating oil Petrol
D Lubri-cating oil Kero-sene Petrol Petrol
E Kero-sene Diesel Petrol Lubri-cating oil
12. Which of the following petroleum fraction is correctly matched to its use ?
a. Bitumen, as feedstock for chemical industry
b. Naptha, for making road
c. Lubricating oil, for making polishes and waxes
d. Diesel oil, as jet fuel
e. LNG, for making plastic
13. Which substance is found in petrol?
14. At which location in this distillation column will petroleum gas, C1 - C4 hydrocarbons, be most likely to be collected?
15. Natural gas is mainly … with smaller amounts of the other gaseous alkanes.
16. The wrong statement about LNG is ….
a. liquefied petroleum gas
b. natural gas in its liquid form.
c. when it is cooled to minus -161ºC, it becomes colorless and odorless
d. neither corrosive nor toxic.
e. primarily methane
17. The hydrocarbons found in LPG contain … carbon atoms per molecule.
18. LPG is ….
a. Liquified Gas of Gasoline
b. Motor cycle’s fuel
e. gas fuel
19. Gasoline hydrocarbons contain … carbon atoms per molecule.
20. The fractional petroleum which contains C atoms about 15 - 19 is used as ....
a. fuel for car
b. fuel for motor cycle
d. diesel machine
21. The substance contains in the gasoline that has a high value of combustion is ....
22. The systematical name of isooctane is ....
23. The formulae of isooctane is ....
24. For a gasoline to function properly in an engine, it should not begin to burn before it is ignited by the spark plug. If it does, it gives engine “knock.” The antiknock characteristics of a gasoline are rated by the octane-number scale. This scale is based on ….
a. heptane, given an octane number of 0
b. heptane, given an octane number of 100
c. 2,2,4-trimethylpentane, given an octane number of 0
d. 2,2,4-trimethylpentane, given an octane number of 100
e. heptane with the octane no. of 0 and isooctane with the octane no. of 100 V
25. Certain substances, such as tetraethyllead, Pb(C2H5)4 were added to gasoline to ….
a. raise the octane number
b. raise the amounts of isooctane
c. decrease the amounts of antiknock
d. decrease the octane rating
e. increase the amounts of n-heptane
26. What does the octane rating for gasoline tell you?
a. amino acids
b. carboxylic acids
c. the tendency of fuel to knock.
d. the number of carbon atoms
e. the rate of combustion
27. The substance used for increasing the quality of gasoline is ….
28. TEL is ….
a. tertier lead
b. tertier ethyl lead
d. tetraethyl lead
29. The formulae of TEL is ….
30. As anti-knocking, TEL is added into gasoline with another substance. This is ….
a. bromo ethane
b. 1,2-dibromo ethane
d. chloro ethane
e. 1,2-dichloro ethane
31. The formulae of 1,2-dibromoethane is ....
32. When a certain gasoline that contain tetraethyllead and 1,2-dibromoethane is burnt, it will produce ....
a. CO2, H2O
b. CO2, H2O, Br2
c. CO2, H2O, Pb
d. CO2, H2O, PbBr2
e. CO2, H2O, PbO, Br2
33. The octane number of pure gasoline is 80%. The meaning of this percentage is the fuel contains ....
a. octane : heptane = 4 : 2
b. 80% octane and 20% heptane
c. 80 % heptane and 20% octane
d. 100% long chain hydrocarbon
e. 80% octane
34. The following substances might be used as anti-knocking.
The anti-knocking which used in the pertamax plus is ….
d. 1 and 2
e. 1 and 3
35. The gasoline which has the octane number more than 92 is (are) ….
3. pertamax plus
d. 1 and 2
e. 2 and 3
36. Recently, tetraethyllead doesn’t use for anti-knocking, because it ….
a. contains Pb
b. caused air pollution
c. doesn’t work properly
d. reacts with gasoline
e. consists of molecules
37. MTBE is ….
a. methyl tersierbutyl ether
b. methane tribromo ether
c. methyl tribromo ether
d. methyl tributyl ethane
e. methyl tersierbutyl ethane
38. The formulae of MTBE is ….
39. The products when natural gas or petroleum are burnt in excess oxygen is ….
d. C and CO
e. C and CO2
40. Propane has heat of combustion 2200 kJ/mol. Burning 22g propane should release … kJ.
41. Carbon dioxide is formed in the complete combustion of a fuel. Carbon monoxide can be formed in the incomplete combustion of a fuel. Which statement is TRUE about these two gases?
a. neither compound will burn in air
b. both gases are compounds
c. both gases are toxic to animals
d. both gases give a milky precipitate when bubbled into limewater
42. There are many aspects to consider regarding gasoline as a consumer item. Which is false?
a. Gasoline is a mixture of molecules, containing mostly hydrocarbons.
b. Several decades ago, tetraethyl lead was used as a gasoline additive to control engine "knocking."
c. Oxygenated additives like ethanol help lower emissions and raise the octane rating.
d. None of the answers are false; all are true.
43. Petroleum is separated by distillation into fractions such as gasoline and kerosene. These fractions are usually processed further—for example, to obtain a greater quantity of gasoline with the desired fuel characteristics. This processing is called ….
44. If you are already using the proper octane fuel, you will:
1. not obtain more power from higher octane fuels.
2. The engine will be already operating at optimum settings
3. a higher octane should have no effect on the management system.
The correct answer is (are) ….
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2 only
e. 1, 2, and 3
45. The reaction which used to break the long chain of hydrocarbon is called ....
46. One of the equations below is the cracking reaction. The correct answer is ….
b. C17H36 + 26 O2 17 CO2 + 18 H2O
c. C8H16 + H2 C8H18
d. C8H16 + Br2 C8H16Br2
e. C8H16 + HCl C8H17Cl
47. The cracking reaction is very important in the petroleum industry. The wrong information below is ….
a. as a source of alkenes
b. it is used to provide extra kerosene
c. provide gasoline of a high octane rating
d. under the right conditions usually produce ethene and propene
e. tends to produce branched-chain rather than straight-chain alkanes
48. Cracking process can be used to provide gasoline with a high octane number, because it can produce ….
b. certain alkane
e. isooctane and n-heptane
49. The statements below are about a catalytic cracking. The wrong statement is ….
a. Al2O3/SiO2 are as catalysts
b. can undergo at lower temperature
c. hydrogen gas may also be produced
d. alkane with larger molecules cannot be cracked
e. alkane with smaller molecules will be produced
50. Catalytic cracking of C16H34 will produce ….
a. octene and octane
b. octane only
c. octene only
d. benzene and decane
e. hexane and decane
51. Cracking process needs a high temperature, because ....
a. it needs energy
b. the reaction is exotherm
c. the reaction is endotherm
d. the reactant is a polar substance
e. the reactant is a non polar substance
52. Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel?
a. on burning it produces lots of greenhouse gases
b. on burning it gives off lots of wasted light energy
c. it has to be compressed before it can be distributed efficiently
d. it is not as flammable or explosive as
53. Which word would you associate with the phrase 'a substance that releases energy on burning'?
54. Which of these is a desirable property of a fuel for burning?
a. difficult to ignite so not too flammable
b. gives bright clear flame
c. will not burn too steadily to be wasteful
d. gives moderate amount of smoke