McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Pharmacy (B. Pharma) , Pharmacy .
Chapters
| 51. |
Which of the following compound has maximum boiling point…….. |
| A. | n-hexane |
| B. | n-pentane |
| C. | 2, 2-dimethyl propane |
| D. | 2-methyl butane |
| Answer» A. n-hexane | |
| 52. |
Knocking sound occurs in engine when fuel………. |
| A. | Ignites slowly |
| B. | Ignites rapidly |
| C. | Contains water |
| D. | Is mixed with machine oil |
| Answer» B. Ignites rapidly | |
| 53. |
Petroleum is mainly a mixture of……….. |
| A. | Alkanes |
| B. | Cyclohexane |
| C. | Benzenoid hydrocarbons |
| D. | Alkenes |
| Answer» A. Alkanes | |
| 54. |
Which of the following has maximum boiling point…………… |
| A. | iso-octane |
| B. | n-octane |
| C. | 2, 2, 3, 3-tetramethyl butane |
| D. | n-butane |
| Answer» B. n-octane | |
| 55. |
Aqueous solution of the following compound on electrolysis gives ethane………. |
| A. | Acetic acid |
| B. | Acetamide |
| C. | Potassium acetate |
| D. | Ethyl acetate |
| Answer» C. Potassium acetate | |
| 56. |
Which of the following does not decolourise bromine solution in carbon disulphide……….. |
| A. | Acetylene |
| B. | Propene |
| C. | Ethane |
| D. | Propyne |
| Answer» C. Ethane | |
| 57. |
Anhydrous sodium acetate on heating with sodalime gives…………. |
| A. | Acetic acid |
| B. | Methane |
| C. | Calcium acetate |
| D. | Ethane |
| Answer» B. Methane | |
| 58. |
Water gas is……….. |
| A. | CO + CO2 |
| B. | CO + N2 |
| C. | CO + H2 |
| D. | CO + N2 + H2 |
| Answer» C. CO + H2 | |
| 59. |
A sample of gasoline contains 81% iso-octane and 19% nheptane. Its octane number will be…….. |
| A. | 19 |
| B. | 81 |
| C. | 100 |
| D. | 62 |
| Answer» B. 81 | |
| 60. |
The natural petroleum contains…………. |
| A. | Saturated hydrocarbons |
| B. | Cyclic saturated hydrocarbons |
| C. | Compounds of sulphur |
| D. | All of these |
| Answer» D. All of these | |
| 61. |
The preparation of ethane by electrolysis of aqueous solution of potassium acetate is called as……. |
| A. | Wurtz reaction |
| B. | Sabatier-Senderen's reaction |
| C. | Kolbe's synthesis |
| D. | Grignard reaction |
| Answer» C. Kolbe's synthesis | |
| 62. |
As the number of carbon atoms in a chain increases the boiling point of alkanes………. |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | May increase or decrease |
| Answer» A. Increases | |
| 63. |
In the fractional distillation of crude petroleum……….. |
| A. | Petrol condenses at the bottom of the column |
| B. | The gases condense at the top of the column |
| C. | High boiling constituents condense at the bottom of the column |
| D. | High boiling constituents condense at the top of the column |
| Answer» C. High boiling constituents condense at the bottom of the column | |
| 64. |
Which of the following is not an endothermic reaction………… |
| A. | Dehydrogenation |
| B. | Ethane to ethene |
| C. | Combustion of propane |
| D. | Change of chlorine molecule into chlorine atoms |
| Answer» C. Combustion of propane | |
| 65. |
Gasoline is the name of …………… |
| A. | Crude oil |
| B. | The gaseous constituents of petroleum |
| C. | The mixture of uncondensed gases produced in the distillation of crude oil |
| D. | The mixture of the residue and gas oil obtained in the distillation of crude oil |
| Answer» B. The gaseous constituents of petroleum | |
| 66. |
In the process of cracking…………… |
| A. | Organic compounds decompose into their constituent elements |
| B. | Hydrocarbons decompose into carbon and hydrogen |
| C. | High molecular weight organic compounds decompose to give low molecular weight organic compounds |
| D. | Hydrocarbons yield alkyl radicals and hydrogen |
| Answer» C. High molecular weight organic compounds decompose to give low molecular weight organic compounds | |
| 67. |
Octane number has 0 value for………. |
| A. | iso-octane |
| B. | n-hexane |
| C. | n-heptane |
| D. | iso-heptane |
| Answer» C. n-heptane | |
| 68. |
Dry distillation of sodium propanoate with sodalime gives ………….. |
| A. | Propane |
| B. | Propene |
| C. | Ethane |
| D. | Ethene |
| Answer» C. Ethane | |
| 69. |
A mixture of propene and methane is obtained by the cracking of………….. |
| A. | 1-butene |
| B. | 2-butene |
| C. | n-butane |
| D. | Isobutane |
| Answer» C. n-butane | |
| 70. |
Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in o C are given below) |
| A. | 40 – 80 |
| B. | 80 - 200 |
| C. | 200 - 300 |
| D. | Above 300 |
| Answer» C. 200 - 300 | |
| 71. |
On mixing tetraethyl lead to gasoline available at petrol pumps………….. |
| A. | Calorific value of the fuel increases |
| B. | Odour diminishes |
| C. | Less smoke is obtained on combustion |
| D. | Antiknock property of fuel increases |
| Answer» D. Antiknock property of fuel increases | |
| 72. |
A liquid hydrocarbon can be converted to gaseous hydrocarbon by………….. |
| A. | Cracking |
| B. | Hydrolysis |
| C. | Oxidation |
| D. | Distillation under reduced pressure |
| Answer» A. Cracking | |
| 73. |
The tetrahedral nature of carbon was first given by…………. |
| A. | Kekule |
| B. | Le Bell and Van't Hoff |
| C. | Pauling |
| D. | Armstrong and Bayer |
| Answer» B. Le Bell and Van't Hoff | |
| 74. |
Formation of alkane by the action of Zn on alkyl halide is called |
| A. | Frankland's reaction |
| B. | Wurtz reaction |
| C. | Cannizzaro reaction |
| D. | Kolbe's reaction |
| Answer» A. Frankland's reaction | |
| 75. |
Name the hydrocarbon that is a liquid at STP………. |
| A. | Ethane |
| B. | Propane |
| C. | n-butane |
| D. | n-pentane |
| Answer» D. n-pentane | |
| 76. |
Which statement is not true concerning alkanes……….. |
| A. | Large number alkanes are soluble in water |
| B. | All alkanes have a lower density than water |
| C. | At room temperature some alkanes are liquids, some solids and some gases |
| D. | All alkanes burn |
| Answer» A. Large number alkanes are soluble in water | |
| 77. |
Fischer Tropsch process is used for the manufacture of………… |
| A. | Synthetic petrol |
| B. | Thermosetting plastics |
| C. | Ethanol |
| D. | Benzene |
| Answer» A. Synthetic petrol | |
| 78. |
A fuel contains 25 % n-heptane and 75 % iso-octane. Its octane number is…………… |
| A. | 50 |
| B. | 75 |
| C. | 100 |
| D. | 25 |
| Answer» B. 75 | |
| 79. |
Sodium ethoxide is a specific reagent for…………… |
| A. | Dehydration |
| B. | Dehydrogenation |
| C. | Dehydrohalogenation |
| D. | Dehalogenation |
| Answer» C. Dehydrohalogenation | |
| 80. |
Which of the following has highest percentage of hydrogen……….. |
| A. | CH4 |
| B. | C2H4 |
| C. | C6H6 |
| D. | C2H2 |
| Answer» A. CH4 | |
| 81. |
What is the molecular formula of the alkane, the 5.6 litre of which weight 11 g at STP………. |
| A. | C6 H14 |
| B. | C4H10 |
| C. | C3H8 |
| D. | C2H6 |
| Answer» C. C3H8 | |
| 82. |
The order of appearance of the following with rising temperature during the refining of crude oil is…..…...... |
| A. | Kerosene oil, gasoline, diesel |
| B. | Diesel, gasoline, kerosene oil |
| C. | Gasoline, diesel, kerosene oil |
| D. | Gasoline, kerosene oil, diesel |
| Answer» D. Gasoline, kerosene oil, diesel | |
| 83. |
When sodium propionate is heated with soda lime, the main product is………….. |
| A. | Ethane |
| B. | Methane |
| C. | Propane |
| D. | Butane |
| Answer» A. Ethane | |
| 84. |
Gasoline is a mixture of alkanes with the number of carbon atoms ……………. |
| A. | C3 + C5 |
| B. | C5 + C6 |
| C. | C6 + C8 |
| D. | C7 + C9 |
| Answer» D. C7 + C9 | |
| 85. |
The final product of complete oxidation of hydrocarbons is ……….. |
| A. | Acid |
| B. | Aldehyde |
| C. | H2O + CO2 |
| D. | Dihydric alcohol |
| Answer» C. H2O + CO2 | |
| 86. |
Which of the following will have least hindered rotation about carbon-carbon bond………… |
| A. | Ethane |
| B. | Ethylene |
| C. | Acetylene |
| D. | Hexachloroethane |
| Answer» A. Ethane | |
| 87. |
How many types of carbon atoms are present in 2, 2, 3trimethylpentane……….. |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 88. |
Which one gives only one monosubstitution product on chlorination……….. |
| A. | n-pentane |
| B. | (b) Neopentane |
| C. | (c) Isopentane |
| D. | (d) n-butane |
| Answer» B. (b) Neopentane | |
| 89. |
CH4 is formed when…………. |
| A. | Sodium acetate is heated with sodalime |
| B. | Iodomethane is reduced |
| C. | Aluminium carbide reacts with water |
| D. | All of these |
| Answer» D. All of these | |
| 90. |
Which one of the following compounds does not give addition reactions……………… |
| A. | Aldehydes |
| B. | Alkanes |
| C. | Alkenes |
| D. | Alkynes |
| Answer» B. Alkanes | |
| 91. |
The most important method of preparation of hydrocarbons of lower carbon number is…………. |
| A. | Pyrolysis of higher carbon number hydrocarbons |
| B. | Electrolysis of salts of fatty acids |
| C. | Sabatier and Senderen's reaction |
| D. | Direct synthesis |
| Answer» A. Pyrolysis of higher carbon number hydrocarbons | |
| 92. |
The inorganic origin of petroleum is indicated by the fact that………….. |
| A. | Its constituents can be separated by fractional distillation |
| B. | Carbon and hydrocarbon can combine by absorption of solar energy to give hydrocarbons |
| C. | Petroleum contains traces of chlorophyll |
| D. | Oil fields are located with the help of seismograph |
| Answer» 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…………. |
| A. | Butane |
| B. | Ethane |
| C. | Propane |
| D. | A mixture of the above three |
| Answer» D. A mixture of the above three | |
| 94. |
Product obtained by nitration of propane is ……………. |
| A. | Nitropropane |
| B. | Nitromethane |
| C. | Nitroethane |
| D. | All of these |
| Answer» D. All of these | |
| 95. |
Isomerism in saturated hydrocarbons is due to………….. |
| A. | Change in the valence of carbon |
| B. | Change in the ratio of elements in compounds |
| C. | Formation of branches in the chain of C atoms |
| D. | Formation of double bond |
| Answer» C. Formation of branches in the chain of C atoms | |
| 96. |
Which of the following is not linked with methane…………. |
| A. | Marsh gas |
| B. | Natural gas |
| C. | Producer gas |
| D. | Coal gas |
| Answer» C. Producer gas | |
| 97. |
Which of the following has highest octane number………….. |
| A. | n-hexane |
| B. | n-heptane |
| C. | Iso-octane |
| D. | n-heptane and iso-octane mixed in ratio 50 : 50 |
| Answer» 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………….. |
| A. | n-butane |
| B. | n-propane |
| C. | n-pentane |
| D. | n-hexan |
| Answer» B. n-propane | |
| 99. |
Most of the hydrocarbons from petroleum are obtained by……………. |
| A. | Fractional distillation |
| B. | Fractional crystallization |
| C. | Vaporization |
| D. | Polymerization |
| Answer» A. Fractional distillation | |
| 100. |
Which is the best antiknock compound or Which one of the following substances is used as an antiknock compound …………… |
| A. | Lead tetrachloride |
| B. | Lead acetate |
| C. | Zinc ethyl |
| D. | Tetraethyl lead (TEL) |
| Answer» D. Tetraethyl lead (TEL) | |
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