Correct : A. n-Pentane > iso-Pentane > neo-Pentane
3. To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant will be………
Correct : A. n-propyl bromide
4. In the preparation of Grignard reagent from haloalkane, the metal
Correct : A. Mg
5. Sodium acetate can be converted to ethane by……….
Correct : B. Electrolysing its aqueous solution
6. Which of the following compounds is used in antiknock compositions to prevent the deposition of
oxides of lead on spark plug, combustion chamber and exhaust pipe…….
Correct : C. 1, 2-dibromoethane
7. Which of petroleum corresponds to kerosene oil………
Correct : B. C10 – C12
8. In the reaction CH3- Br+ 2Na+ Br-CH3 , the product called ……..
Correct : A. Wurtz reaction
9. Iodoethane reacts with sodium in the presence of dry ether. The product is……..
Correct : D. Butane
10. Which of the following is oxidised by KMnO4
Correct : C. Isobutane
11. The most volatile compound is……….
Correct : A. 2, 2-dimethyl propane
12. In Wurtz reaction, the reagent used is………..
Correct : C. ether dry Na
13. Which of the following has highest octane number…………
Correct : D. 2, 2, 4-trimethyl pentane
14. What is freon-12…….
Correct : B. Refrigerant
15. The petrol having octane number 80 has…………
Correct : A. 20% normal heptane + 80% iso-octane
16. The shape of methane molecule is………..
Correct : D. Tetrahedral
17. . Which of the following shows only one brominated compound…………
Correct : B. 2, 2-dimethylpropane
18. Kerosene is used as fuel because it is………….
Correct : B. More volatile
19. Which of the following statements is not true for ethane………….
Correct : B. It can be catalytically hydrogenated
20. Petroleum refining is ……………
Correct : A. Distillation of petroleum to get different fractions
21. The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber
is……
Correct : B. Ethylene dibromide
22. In the commercial gasolines, the type of hydrocarbons which are more desirable is………..
Correct : A. Branched hydrocarbon
23. Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight……….
Correct : D. CH3CH2CH3
24. Which of the following has the highest boiling point………..
Correct : C. n-heptane
25. Which gives CH4 when treated with water……..
Correct : C. Aluminium carbide
26. Which of the following does not react with PCl5
Correct : D. C2H6
27. Which of the following compounds is insoluble even in hot concentrated H2SO4………
Correct : C. Hexane
28. A reaction between methyl magnesium bromide and ethyl alcohol gives……….
Correct : A. Methane
29. Methane and ethane both can be obtained in single step from …………
Correct : A. CH3 I
30. Paraffin wax is………..
Correct : D. Saturated Hydrocrabon
31. The number of possible enantiomeric pairs that can be produced during monochlorination of 2-
methylbutane is ……..
Correct : A. 2
32. Petroleum consists mainly of…………
Correct : A. Aliphatic hydrocarbons
33. Petroleum ether can be used as……….
Correct : A. Solvent for fat, oil, varnish and rubber
34. Which of the following are produced from coaltar………..
Correct : D. All the three
35. In alkanes, the bond angle is……..
Correct : A. 109.5 o
36. In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts of
saturated carboxylic acid are subjected to………
Correct : D. Electrolysis
37. Halogenation of alkanes is an example of………..
Correct : C. Free-radical substitution
38. Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is…………
Correct : B. Propane
39. When ethyl iodide and propyl iodide react with Na in the presence of ether, they form………
Correct : D. Three alkanes
40. The alkane that yields two isomeric monobromo derivatives is……………
Correct : D. Propane
41. Kerosene is a mixture of………….
Correct : B. Aromatic compounds
42. When petroleum is heated the vapours contain mainly………….
Correct : D. Machine oil
43. Iso-octane is mixed to the petrol………….
Correct : D. As an antiknock
44. Cyclohexane, a hydrocarbon floats on water because…………
Correct : A. It is immiscible with water
45. Natural gas contains mainly………….
Correct : D. Mixture of octane
46. Which compound is not inflammable………..
Correct : A. CCl4
47. Propane is obtained from propene, by which of the following methods……….
Correct : A. Wurtz reaction
48. LPG is a mixture of………….
Correct : B. C4H10+ C3H8
49. Carbon black, which is used in making printer's ink, is obtained by decomposition of………….
Correct : D. Methane
50. The addition of tetraethyl lead to petrol…………
Correct : B. Raises its octane number
51. Which of the following compound has maximum boiling point……..
Correct : A. n-hexane
52. Knocking sound occurs in engine when fuel……….
Correct : B. Ignites rapidly
53. Petroleum is mainly a mixture of………..
Correct : A. Alkanes
54. Which of the following has maximum boiling point……………
Correct : B. n-octane
55. Aqueous solution of the following compound on electrolysis gives ethane……….
Correct : C. Potassium acetate
56. Which of the following does not decolourise bromine solution in carbon disulphide………..
Correct : C. Ethane
57. Anhydrous sodium acetate on heating with sodalime gives………….
Correct : B. Methane
58. Water gas is………..
Correct : C. CO + H2
59. A sample of gasoline contains 81% iso-octane and 19% nheptane. Its octane number will be……..
Correct : B. 81
60. The natural petroleum contains………….
Correct : D. All of these
61. The preparation of ethane by electrolysis of aqueous solution of potassium acetate is called as…….
Correct : C. Kolbe's synthesis
62. As the number of carbon atoms in a chain increases the boiling point of alkanes……….
Correct : A. Increases
63. In the fractional distillation of crude petroleum………..
Correct : C. High boiling constituents condense at the bottom of the column
64. Which of the following is not an endothermic reaction…………
Correct : C. Combustion of propane
65. Gasoline is the name of ……………
Correct : B. The gaseous constituents of petroleum
66. In the process of cracking……………
Correct : C. High molecular weight organic compounds decompose to give low molecular weight organic compounds
67. Octane number has 0 value for……….
Correct : C. n-heptane
68. Dry distillation of sodium propanoate with sodalime gives …………..
Correct : C. Ethane
69. A mixture of propene and methane is obtained by the cracking of…………..
Correct : C. n-butane
70. Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in o C are
given below)
Correct : C. 200 - 300
71. On mixing tetraethyl lead to gasoline available at petrol pumps…………..
Correct : D. Antiknock property of fuel increases
72. A liquid hydrocarbon can be converted to gaseous hydrocarbon by…………..
Correct : A. Cracking
73. The tetrahedral nature of carbon was first given by………….
Correct : B. Le Bell and Van't Hoff
74. Formation of alkane by the action of Zn on alkyl halide is called
Correct : A. Frankland's reaction
75. Name the hydrocarbon that is a liquid at STP……….
Correct : D. n-pentane
76. Which statement is not true concerning alkanes………..
Correct : A. Large number alkanes are soluble in water
77. Fischer Tropsch process is used for the manufacture of…………
Correct : A. Synthetic petrol
78. A fuel contains 25 % n-heptane and 75 % iso-octane. Its octane number is……………
Correct : B. 75
79. Sodium ethoxide is a specific reagent for……………
Correct : C. Dehydrohalogenation
80. Which of the following has highest percentage of hydrogen………..
Correct : A. CH4
81. What is the molecular formula of the alkane, the 5.6 litre of which weight 11 g at STP……….
Correct : C. C3H8
82. The order of appearance of the following with rising temperature during the refining of crude oil is…..…......
Correct : D. Gasoline, kerosene oil, diesel
83. When sodium propionate is heated with soda lime, the main product is…………..
Correct : A. Ethane
84. Gasoline is a mixture of alkanes with the number of carbon atoms …………….
Correct : D. C7 + C9
85. The final product of complete oxidation of hydrocarbons is ………..
Correct : C. H2O + CO2
86. Which of the following will have least hindered rotation about carbon-carbon bond…………
Correct : A. Ethane
87. How many types of carbon atoms are present in 2, 2, 3trimethylpentane………..
Correct : D. Four
88. Which one gives only one monosubstitution product on chlorination………..
Correct : B. (b) Neopentane
89. CH4 is formed when………….
Correct : D. All of these
90. Which one of the following compounds does not give addition reactions………………
Correct : B. Alkanes
91. The most important method of preparation of hydrocarbons of lower carbon number is………….
Correct : A. Pyrolysis of higher carbon number hydrocarbons
92. The inorganic origin of petroleum is indicated by the fact that…………..
Correct : B. Carbon and hydrocarbon can combine by absorption of solar energy to give hydrocarbons
93. By Wurtz reaction, a mixture of methyliodide and ethyliodide gives………….
Correct : D. A mixture of the above three
94. Product obtained by nitration of propane is …………….
Correct : D. All of these
95. Isomerism in saturated hydrocarbons is due to…………..
Correct : C. Formation of branches in the chain of C atoms
96. Which of the following is not linked with methane………….
Correct : C. Producer gas
97. Which of the following has highest octane number…………..
Correct : C. Iso-octane
98. A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon that will not be formed is…………..
Correct : B. n-propane
99. Most of the hydrocarbons from petroleum are obtained by…………….
Correct : A. Fractional distillation
100. Which is the best antiknock compound or Which one of the following substances is used as an
antiknock compound ……………