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Pharmaceutical Organic Chemistry 1 Multiple Choice Questions
1. Which represents an alkane………
A. C5H8
B. C6H8
C. C9H10
D. C7H16
Answer: D. C7H16
2. The decreasing order of boiling points is ……….
A. n-Pentane > iso-Pentane > neo-Pentane
B. iso-Pentane > n-Pentane > neo-Pentane
C. neo-Pentane > iso-Pentane > n-Pentane
D. n-Pentane > neo-Pentane > iso-Pentane
Answer: 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………
A. n-propyl bromide
B. Ethyl bromide and n-butyl bromide
C. Ethyl chloride and n-butyl chloride
D. Methyl bromide and n -pentyl chloride
Answer: A. n-propyl bromide
4. In the preparation of Grignard reagent from haloalkane, the metal
A. Mg
B. Zn
C. Li
D. K
Answer: A. Mg
5. Sodium acetate can be converted to ethane by……….
A. Heating with LiAlH4
B. Electrolysing its aqueous solution
C. Heating with sodalime
D. Heating with calcium acetate
Answer: B. Electrolysing its aqueous solution
6. Which of the following compounds is used in antiknock compositions to prevent the deposition ofoxides of lead on spark plug, combustion chamber and exhaust pipe…….
A. Glycerol
B. Glycol
C. 1, 2-dibromoethane
D. Benzene
Answer: C. 1, 2-dibromoethane
7. Which of petroleum corresponds to kerosene oil………
A. C15-C18
B. C10 – C12
C. C5 – C9
D. C1 –C9
Answer: B. C10 – C12
8. In the reaction CH3- Br+ 2Na+ Br-CH3 , the product called ……..
A. Wurtz reaction
B. Aldol condensation
C. Perkin’s reaction
D. Levit reaction
Answer: A. Wurtz reaction
9. Iodoethane reacts with sodium in the presence of dry ether. The product is……..
A. Pentane
B. Propane
C. Butene
D. Butane
Answer: D. Butane
10. Which of the following is oxidised by KMnO4
A. Methane
B. Pentane
C. Isobutane
D. Neopentane
Answer: C. Isobutane
11. The most volatile compound is……….
A. 2, 2-dimethyl propane
B. 2-methyl butane
C. Isobutane
D. n-pentane
Answer: A. 2, 2-dimethyl propane
12. In Wurtz reaction, the reagent used is………..
A. Na
B. liquid NH3Na
C. ether dry Na
D. alcohol dry Na
Answer: C. ether dry Na
13. Which of the following has highest octane number…………
A. n-hexane
B. n-heptane
C. n-pentane
D. 2, 2, 4-trimethyl pentane
Answer: D. 2, 2, 4-trimethyl pentane
14. What is freon-12…….
A. Pesticide
B. Refrigerant
C. Solvent
D. Lubricant
Answer: B. Refrigerant
15. The petrol having octane number 80 has…………
A. 20% normal heptane + 80% iso-octane
B. 80% normal heptane + 20% iso-octane
C. 20% normal heptane + 80% normal octane
D. 80% normal heptane + 20% normal octane
Answer: A. 20% normal heptane + 80% iso-octane
16. The shape of methane molecule is………..
A. Linear
B. Trigonal planar
C. Square planar
D. Tetrahedral
Answer: D. Tetrahedral
17. . Which of the following shows only one brominated compound…………
A. Butene-2
B. 2, 2-dimethylpropane
C. Butyne-1
D. Butanol-3
Answer: B. 2, 2-dimethylpropane
18. Kerosene is used as fuel because it is………….
A. Less volatile
B. More volatile
C. Cheap
D. Abundantly available
Answer: B. More volatile
19. Which of the following statements is not true for ethane………….
A. It can be chlorinated with chlorine
B. It can be catalytically hydrogenated
C. When oxidised produces CO2 and H2O
D. It is a homologue of iso-butane
Answer: B. It can be catalytically hydrogenated
20. Petroleum refining is ……………
A. Distillation of petroleum to get different fractions
B. Obtaining aromatic compounds from aliphatic compounds present in petroleum
C. Cracking of petroleum to get gaseous hydrocarbons
D. Purification of petroleum
Answer: A. Distillation of petroleum to get different fractions
21. The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamberis……
A. Iso-octane
B. Ethylene dibromide
C. Tetraethyl lead
D. Mercaptan
Answer: B. Ethylene dibromide
22. In the commercial gasolines, the type of hydrocarbons which are more desirable is………..
A. Branched hydrocarbon
B. Straight-chain hydrocarbon
C. Linear unsaturated hydrocarbon
D. Toluene
Answer: A. Branched hydrocarbon
23. Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight……….
A. CHCl3
B. CH3Cl
C. CH3CH3
D. CH3CH2CH3
Answer: D. CH3CH2CH3
24. Which of the following has the highest boiling point………..
A. Neopentane
B. n-butane
C. n-heptane
D. Isobutane
Answer: C. n-heptane
25. Which gives CH4 when treated with water……..
A. Silicon carbide
B. Calcium carbide
C. Aluminium carbide
D. Iron carbide
Answer: C. Aluminium carbide
26. Which of the following does not react with PCl5
A. CH3OH
B. CH3COOH
C. CH3CHO
D. C2H6
Answer: D. C2H6
27. Which of the following compounds is insoluble even in hot concentrated H2SO4………
A. Ethylene
B. Benzene
C. Hexane
D. Aniline
Answer: C. Hexane
28. A reaction between methyl magnesium bromide and ethyl alcohol gives……….
A. Methane
B. Ethane
C. Propane
D. Butane
Answer: A. Methane
29. Methane and ethane both can be obtained in single step from …………
A. CH3 I
B. C2H5I
C. CH3OH
D. C2H5OH
Answer: A. CH3 I
30. Paraffin wax is………..
A. Ester
B. Alcohol
C. Unsaturated hydrocarbon
D. Saturated Hydrocrabon
Answer: D. Saturated Hydrocrabon
31. The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methylbutane is ……..
A. 2
B. 3
C. 4
D. 1
Answer: A. 2
32. Petroleum consists mainly of…………
A. Aliphatic hydrocarbons
B. Aromatic hydrocarbons
C. Aliphatic alcohols
D. None of these
Answer: A. Aliphatic hydrocarbons
33. Petroleum ether can be used as……….
A. Solvent for fat, oil, varnish and rubber
B. As a fuel
C. Both (a) and (b)
D. None of these
Answer: A. Solvent for fat, oil, varnish and rubber
34. Which of the following are produced from coaltar………..
A. Synthetic dyes
B. Drugs
C. Perfumes
D. All the three
Answer: D. All the three
35. In alkanes, the bond angle is……..
A. 109.5 o
B. 109 o
C. 120 o
D. 180 o
Answer: A. 109.5 o
36. In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts ofsaturated carboxylic acid are subjected to………
A. Hydrolysis
B. Oxidation
C. Hydrogenation
D. Electrolysis
Answer: D. Electrolysis
37. Halogenation of alkanes is an example of………..
A. Electrophilic substitution
B. Nucleophilic substitution
C. Free-radical substitution
D. Oxidation
Answer: 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…………
A. Ethane
B. Propane
C. Butane
D. None of these
Answer: B. Propane
39. When ethyl iodide and propyl iodide react with Na in the presence of ether, they form………
A. One alkane
B. Two alkanes
C. Four alkanes
D. Three alkanes
Answer: D. Three alkanes
40. The alkane that yields two isomeric monobromo derivatives is……………
A. Neopentane
B. Ethane
C. Methane
D. Propane
Answer: D. Propane
41. Kerosene is a mixture of………….
A. Alkanes
B. Aromatic compounds
C. Alcohols
D. Aliphatic acids
Answer: B. Aromatic compounds
42. When petroleum is heated the vapours contain mainly………….
A. Kerosene
B. Petroleum ether
C. Diesel
D. Machine oil
Answer: D. Machine oil
43. Iso-octane is mixed to the petrol………….
A. To precipitate inorganic substances
B. To prevent freezing of petrol
C. To increase boiling point of petrol
D. As an antiknock
Answer: D. As an antiknock
44. Cyclohexane, a hydrocarbon floats on water because…………
A. It is immiscible with water
B. Its density is low as compared to water
C. It is non-polar substance
D. It is immiscible and lighter than water
Answer: A. It is immiscible with water
45. Natural gas contains mainly………….
A. Methane
B. n-butane
C. n-octane
D. Mixture of octane
Answer: D. Mixture of octane
46. Which compound is not inflammable………..
A. CCl4
B. C2H5OH
C. CH4
D. C6H6
Answer: A. CCl4
47. Propane is obtained from propene, by which of the following methods……….
A. Wurtz reaction
B. Dehydrogenation
C. Frankland reaction
D. Catalytic hydrogenation
Answer: A. Wurtz reaction
48. LPG is a mixture of………….
A. C6H12+ C6H6
B. C4H10+ C3H8
C. C2H4 + C2H2
D. C2H4 + CH4
Answer: B. C4H10+ C3H8
49. Carbon black, which is used in making printer’s ink, is obtained by decomposition of………….
A. Acetylene
B. Benzene
C. Carbon tetrachloride
D. Methane
Answer: D. Methane
50. The addition of tetraethyl lead to petrol…………
A. Lowers its octane number
B. Raises its octane number
C. May raise or lower the octane number
D. Has no effect on octane number
Answer: B. Raises its octane number
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 aregiven 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 anantiknock compound ……………
A. Lead tetrachloride
B. Lead acetate
C. Zinc ethyl
D. Tetraethyl lead (TEL)
Answer: D. Tetraethyl lead (TEL)
101. In the dichlorination reaction of propane, mixture of products are obtained. How many isomers,the mixture contains…………
A. 2
B. 3
C. 4
D. 5
Answer: C. 4
102. Which of the following cycloalkane gives open chain compound, when reacts withbromine………..
A. Cyclopropane
B. Cyclopentane
C. Cyclohexane
D. Cyclo-octane
Answer: A. Cyclopropane
103. Grignard reagent is not prepared in aqueous medium but prepared; in ether medium because thereagent…………..
A. Reacts with water
B. Is insoluble in water
C. Is highly reactive in ether
D. Becomes inactive in water
Answer: A. Reacts with water
104. A sample of petrol is a mixture of 30% n-heptane and 70% iso-octane. The sample has octanenumber…………
A. 30
B. 70
C. 15
D. 35
Answer: B. 70
105. Photochemical chlorination of alkane is initiated by a process of……………
A. Pyrolysis
B. Substitution
C. Cracking
D. Homolysis
Answer: D. Homolysis
106. A petroleum fraction having boiling range 70-200°C and containing 6-10 carbon atoms permolecule is called………..
A. Natural gas
B. Gas oil
C. Gasoline
D. Kerosene
Answer: C. Gasoline
107. Pick out the alkane which differs from the other members of the group.
A. 2,2-dimethyl propane
B. Pentane
C. 2-methyl butane
D. 2,2-dimethyl butane
Answer: D. 2,2-dimethyl butane
108. 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly……..
A. 1-bromo-2-methylbutane
B. 2-bromo-2-methylbutane
C. 2-bromo-3-methylbutane
D. 1-bromo-3-methylbutane
Answer: B. 2-bromo-2-methylbutane
109. Of the five isomeric hexanes, the isomer which can give two monochlorinated compoundsis…………..
A. n-hexane
B. 2, 3-dimethylbutane
C. 2, 2-dimethylbutane
D. 2-methylpentane
Answer: B. 2, 3-dimethylbutane
Alcohol
110. Which group is present on alcohol.
A. OH
B. C=O
C. CHO
D. NO2
Answer: A. OH
111. Which suffix attached in alcohol.
A. En
B. Ol
C. Ene
D. Hyde
Answer: B. Ol
112. Butane-2-ol is …….
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. Aldehyde
Answer: B. Secondary alcohol
113. Pentanol is a……..
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. None of these
Answer: C. Tertiary alcohol
114. Glycerol is a……
A. Primary alcohol
B. Monohydric alcohol
C. Secondary alcohol
D. Trihydric alcohol
Answer: D. Trihydric alcohol
115. Which is primary alcohol…….
A. Butane-2-ol
B. Butane-1-ol
C. Propane-2-ol
D. Isopropyl alcohol
Answer: B. Butane-1-ol
116. General formula of primary alcohol is …….
A. CHOH
B. COH
C. CH2OH
D. COHOH
Answer: C. CH2OH
117. The characteristic grouping of secondary alcohols is…….
A. CHOH
B. COH
C. CH2OH
D. COHOH
Answer: A. CHOH
118. Which of the following are isomers…….
A. Methyl alcohol and dimethyl ether
B. Ethyl alcohol and dimethyl ether
C. Acetone and acetaldehyde
D. Propionic acid and propanone
Answer: B. Ethyl alcohol and dimethyl ether
119. The compound HOH2C – CH2OH is…….
A. Ethane glycol
B. Ethylene glycol
C. Ethylidene alcohol
D. Dimethyl alcohol
Answer: B. Ethylene glycol
120. Methylated spirit is……..
A. Methanol
B. Methanol + ethanol
C. Methanoic acid
D. Methanamide
Answer: B. Methanol + ethanol
121. Absolute alcohol is…….
A. 100% pure ethanol
B. 95% alcohol + 5% H2O
C. Ethanol + water + phenol
D. 95% ethanol + 5% methanol.
Answer: A. 100% pure ethanol
122. Which of the following is dihydric alcohol …….
A. Glycerol
B. Ethylene glycol
C. Catechol
D. Resorcinol
Answer: B. Ethylene glycol
123. Wood spirit is known as ………
A. Methanol
B. Ethanol
C. Acetone
D. Benzene
Answer: A. Methanol
124. Which one of the following will produce a primary alcohol by reacting with CH3MgI……..
A. Acetone
B. Methyl cyanide
C. Ethylene oxide
D. Ethyl acetate
Answer: C. Ethylene oxide
125. The fermentation of starch to give alcohol occurs mainly with the help of ………
A. O2
B. Air
C. CO2
D. Enzymes
Answer: D. Enzymes
126. Ethanol is prepared industrially by………
A. Hydration of ethylene
B. Fermentation of sugars
C. Both the above
D. None of these
Answer: C. Both the above
127. Ethyl alcohol is industrially prepared from ethylene by……..
A. Permanganate oxidation
B. Catalytic reduction
C. Absorbing in H2SO4 followed by hydrolysis
D. Fermentation
Answer: C. Absorbing in H2SO4 followed by hydrolysis
128. Coconut oil upon alkaline hydrolysis gives…….
A. Glycol
B. Alcohol
C. Glycerol
D. Ethylene oxide
Answer: C. Glycerol
129. Which enzyme converts glucose and fructose both into ethanol……..
A. Diastase
B. Invertase
C. Zymase
D. Maltase
Answer: C. Zymase
130. Primary alcohols can be obtained from the reaction of the RMgX……
A. CO2
B. HCHO
C. CH3 CHO
D. H2O
Answer: B. HCHO
131. Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysisgives …..
A. Isopropyl alcohol
B. Ethyl alcohol
C. Methyl alcohol
D. Propyl alcohol
Answer: B. Ethyl alcohol
132. Benzyl alcohol is obtained from benzaldehyde by…..
A. Fittig’s reaction
B. Cannizaro’s reaction
C. Kolbe’s reaction
D. Wurtz’s reaction
Answer: B. Cannizaro’s reaction
133. The product of reduction of benzaldehyde is …..
A. Benzoic acid
B. Benzyl alcohol
C. Benzene
D. Catechol
Answer: B. Benzyl alcohol
134. Alkenes convert into alcohols by……
A. Hydrolysis by dil. Sulphuric acid
B. Hydration of alkene by alkaline KMnO4
C. Hydrolysis by water vapours and conc. Sulphuric acid
D. Hydration of alkene by aqueous KOH
Answer: B. Hydration of alkene by alkaline KMnO4
135. Acetic acid and CH3 are obtained on large scale by destructive distillation of…..
A. Wood
B. Coal
C. Turpentine
D. Crude oil
Answer: A. Wood
136. Acid catalyzed hydration of alkenes except ethene leads to the formation of ……
A. Primary alcohol
B. Secondary or tertiary alcohol
C. Mixture of primary and secondary alcohols
D. Mixture of secondary and tertiary alcohols
Answer: B. Secondary or tertiary alcohol
137. The boiling point of alcohol are …. than corresponding thiols.
A. More
B. Same
C. Either of these
D. Less
Answer: A. More
138. Methyl alcohol can be distinguished from ethyl alcohol using ……
A. Fehling solution
B. Schiff’s reagent
C. Sodium hydroxide and iodine
D. Phthalein fusion test
Answer: C. Sodium hydroxide and iodine
139. A compound X with molecular formula C3H8O can be oxidised to a compound Y with the molecularformula C3H6O2 X is most likely to be …..
A. Primary alcohol
B. Secondary alcohol
C. Aldehyde
D. Ketone
Answer: A. Primary alcohol
140. On heating glycerol with conc. H2SO4 a compound is obtained which has a bad odour. The compoundis…..
A. Glycerol sulphate
B. Acrolein
C. Formic acid
D. Allyl alcohol
Answer: B. Acrolein
141. Isopropyl alcohol on oxidation forms……
A. Acetone
B. Ether
C. Ethylene
D. Acetaldehyde
Answer: A. Acetone
142. . The alcohol that produces turbidity immediately with ZnCl2 + conc. HCl at room temperature…..
A. 1-hydroxybutane
B. 2-hydroxybutane
C. 2-hydroxy-2-methylpropane
D. 1-hydroxy-2-methylpropane
Answer: C. 2-hydroxy-2-methylpropane
143. The reagent which easily reacts with ethanol and propanol is……
A. Fehling solution
B. Grignard reagent
C. Schiff’s reagent
D. Tollen’s reagent
Answer: B. Grignard reagent
144. Propene is the product obtained by dehydrogenation of …….
A. 2-propanol
B. 1-propanol
C. Propanal
D. n -propyl alcohol
Answer: A. 2-propanol
145. Which of the following statements is correct…..
A. Phenol is less acidic than ethyl alcohol
B. Phenol is more acidic than ethyl alcohol
C. Phenol is more acidic than carboxylic acid
D. Phenol is more acidic than carbonic acid
Answer: B. Phenol is more acidic than ethyl alcohol
146. Boiling point of alcohol is comparatively higher than that corresponding alkane due to…….
A. Intermolecular hydrogen bonding
B. Intramolecular hydrogen bonding
C. Volatile nature
D. None of these
Answer: A. Intermolecular hydrogen bonding
147. . The reaction of C2H5OH with H2SO4 does not give ……
A. Ethylene
B. Diethyl ether
C. Acetylene
D. Ethyl hydrogen sulphate
Answer: C. Acetylene
148. In reaction of alcohols with alkali metal, acid etc. which of the following alcohol will react fastest….
A. Secondary
B. Tertiary
C. Primary
D. All equal
Answer: C. Primary
149. Order of reactivity of alcohols towards sodium metal is ……
A. Pri > Sec > Ter
B. Pri > Sec <Ter
C. Pri < Sec > Ter
D. Pri < Sec < Ter
Answer: D. Pri < Sec < Ter
150. The -OH group of methyl alcohol cannot be replaced by chlorine by the action of……
A. Chlorine
B. Hydrogen chloride
C. Phosphorus trichloride
D. Phosphorus pentachloride
Answer: A. Chlorine
151. Which compound has the highest boiling point……
A. Acetone
B. Diethyl ether
C. Methanol
D. Ethanol
Answer: D. Ethanol
152. Dehydration of ethanol gives……
A. Acetic acid
B. Ethane
C. Ethylene
D. Acetylene
Answer: C. Ethylene
153. Absolute ethanol cannot be obtained by simple fraction of a solution of ethanol and water because…..
A. Their B.P.’s are very nearer
B. Ethanol remains dissolved in water
C. They form a constant boiling mixture
D. Ethanol molecules are solvated
Answer: C. They form a constant boiling mixture
154. In esterification, the reactivity of alcohols is ……
A. 1° > 2° > 3°
B. 3° > 2° > 1°
C. Same in all cases
D. None of these
Answer: A. 1° > 2° > 3°
155. Methanol and ethanol are distinguished by the…….
A. Action of HCl
B. Iodoform test
C. Solubility in water
D. Sodium
Answer: B. Iodoform test
156. Ethyl alcohol exhibits acidic character on reacting with…….
A. Acetic acid
B. Sodium metal
C. Hydrogen iodide
D. Acidic potassium dichromate
Answer: B. Sodium metal
157. Which of the following is not characteristic of alcohols……
A. They are lighter than water
B. Their boiling points rise fairly uniformly with increasing molecular weight
C. Lower members are insoluble in water and organic solvents but solubility regularly increases with molecular weight
D. Lower members have pleasant smell and burning taste, while higher members are odourless and tasteless
Answer: C. Lower members are insoluble in water and organic solvents but solubility regularly increases with molecular weight
158. By means of calcium chloride which of following can be dried……
A. Methanol
B. Ethanol
C. Both (a) and (b)
D. None of these
Answer: D. None of these
159. Dimethyl ether and ethyl alcohol are …..
A. Branched isomer
B. Position isomer
C. Functional isomer
D. Tautomer
Answer: C. Functional isomer
160. The process of manufacture of absolute alcohol from rectified spirit is…….
A. Fractional distillation
B. Steam distillation
C. Azeotropic distillation
D. Vacuum distillation
Answer: C. Azeotropic distillation
161. When ethyl alcohol reacts with acetic acid, the products formed are…..
A. Sodium ethoxide + hydrogen
B. Ethyl acetate + water
C. Ethyl acetate + soap
D. Ethyl alcohol + water
Answer: B. Ethyl acetate + water
162. Methanol and ethanol are miscible in water due to…..
A. Covalent character
B. Hydrogen bonding character
C. Oxygen bonding character
D. None of these
Answer: B. Hydrogen bonding character
163. Which of the following is most soluble in water……
A. Normal butyl alcohol
B. Isobutyl alcohol
C. Tertiary butyl alcohol
D. Secondary butyl alcohol
Answer: C. Tertiary butyl alcohol
164. If ethanol dissolves in water, then which of the following would be done……
A. Absorption of heat and contraction in volume
B. Emission of heat and contraction in volume
C. Absorption of heat and increase in volume
D. Emission of heat and increase in volume
Answer: B. Emission of heat and contraction in volume
165. When rectified spirit and benzene are distilled together, the first fraction obtained is……
A. A ternary azeotrope
B. Absolute alcohol
C. A binary azeotrope
D. Denatured spirit
Answer: A. A ternary azeotrope
166. Alcohols combine with acetylene in the presence of mercury compounds as catalyst to form…….
A. Acetals
B. Xanthates
C. Vinyl ethers
D. None of the above
Answer: A. Acetals
167. The boiling point of methanol is greater than that of methyl thiol because
A. There is intramolecular hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol
B. There is intermolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol
C. There is no hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol
D. There is intramolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol
Answer: B. There is intermolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol
168. At 530 K , glycerol reacts with oxalic acid to produce …….
A. Allyl alcohol
B. Formic acid
C. Glyceraldehyde
D. Glycerol monooxalate
Answer: A. Allyl alcohol
169. With anhydrous zinc chloride, ethylene glycol gives…….
A. Formaldehyde
B. Acetylene
C. Acetaldehyde
D. Acetone
Answer: C. Acetaldehyde
170. Amongst the following, HBr reacts fastest with…….
A. Propane-1-ol
B. Propane-2-ol
C. 2-methyl propane-1-ol
D. 2-methyl propane-2-ol
Answer: D. 2-methyl propane-2-ol
171. Which alcohol reacts with fatty acids to form fats…….
A. Ethanol
B. Glycerol
C. Methanol
D. Isopropanol
Answer: B. Glycerol
172. Which will dehydrate easily…….
A. 3-methyl-2-butanol
B. Ethyl alcohol
C. 2-methyl propane-2-ol
D. 2-methyl butanol-2
Answer: D. 2-methyl butanol-2
173. On reaction with hot conc. H2SO4 which one of the following compounds loses a molecule ofwater….
A. CH3COCH3
B. CH3COOH
C. CH3OCH3
D. CH3CH2OH
Answer: D. CH3CH2OH
174. C2H5OH can be differentiated from CH3OH by…..
A. Reaction with HCl
B. Reaction with 3 NH
C. By iodoform test
D. By solubility in water
Answer: C. By iodoform test
175. Glycerol is used in the manufacture of
A. Dynamite
B. Varnish
C. Paints
D. Soft drinks
Answer: A. Dynamite
176. Rectified spirit is a mixture of ……….
A. 95% ethyl alcohol + 5% water
B. 94% ethyl alcohol + 4.53% water
C. 94.4% ethyl alcohol + 5.43 % water
D. 95.57% ethyl alcohol + 4.43% water
Answer: D. 95.57% ethyl alcohol + 4.43% water
177. Glycerol as a triester present in …….
A. Petroleum
B. Kerosene
C. Vegetable oil and fat
D. Naphtha
Answer: C. Vegetable oil and fat
178. : Power alcohol is ……
A. An alcohol of 95% purity
B. A mixture of petrol hydrocarbons and ethanol
C. Rectified spirit
D. A mixture of methanol and ethanol
Answer: B. A mixture of petrol hydrocarbons and ethanol
179. : In cold countries ethylene glycol is added to water in the radiators to
A. Bring down the specific heat of water
B. Lower the viscosity
C. Reduce the viscosity
D. Make water a better lubricant
Answer: A. Bring down the specific heat of water
180. Alcoholic fermentation is brought about by the action of
A. CO2
B. O2
C. Invertase
D. Yeast
Answer: D. Yeast
181. Methyl alcohol is toxic. The reason assigned is………
A. It stops respiratory track
B. It reacts with nitrogen and forms CN in the lungs
C. It increases CO2 content in the blood
D. It is a reduction product of formaldehyde
Answer: B. It reacts with nitrogen and forms CN in the lungs
182. Glycerol is used……..
A. As a sweetening agent
B. In the manufacture of good quality soap
C. In the manufacture of nitro glycerine
D. In all of these
Answer: D. In all of these
183. Glycerol is not used in which of following cases…….
A. Explosive making
B. Shaving soap making
C. As an antifreeze for water
D. As an antiseptic agent
Answer: D. As an antiseptic agent
184. Liquor poisoning is due to …….
A. Presence of bad compound in liquor
B. Presence of methyl alcohol
C. Presence of ethyl alcohol
D. Presence of carbonic acid
Answer: B. Presence of methyl alcohol
185. In order to make alcohol undrinkable pyridine and methanol are added to it. The resulting alcohol iscalled ………
A. Power alcohol
B. Proof spirit
C. Denatured spirit
D. Poison alcohol
Answer: C. Denatured spirit
186. Wine (alcoholic beverages) contains ………
A. CH3OH
B. Glycerol
C. C2H5OH
D. 2-propanol
Answer: C. C2H5OH
187. Which is used as an antifreeze…….
A. Glycol
B. Ethyl alcohol
C. Water
D. Methanol
Answer: A. Glycol
Aldehydes and Ketones
188. In aldehydes and ketones, carbon of carbonyl group is………..
A. 3 sp hybridised
B. 2 sp hybridised
C. sp hybridised
D. Unhybridised
Answer: B. 2 sp hybridised
189. Aldehydes are isomeric with………..
A. Ketones
B. Ethers
C. Alcohols
D. Fatty acids
Answer: A. Ketones
190. Which of the following compounds does not contain an -OH group………..
A. Phenol
B. Carboxylic acid
C. Aldehydes
D. Alcohols
Answer: C. Aldehydes
191. IUPAC name of CH3COCH3 is………..
A. Acetone
B. 2-propanone
C. Dimethyl ketone
D. Propanal
Answer: B. 2-propanone
192. Which of the following types of isomerism is shown by Pentanone.
A. Chain isomerism
B. Position isomerism
C. Functional isomerism
D. All of these
Answer: D. All of these
193. IUPAC name of CHO CCl3 is…………..
A. Chloral
B. Trichloro acetaldehyde
C. 1, 1, 1-trichloroethanal
D. 2, 2, 2-trichloroethanal
Answer: D. 2, 2, 2-trichloroethanal
194. Which of the following is a mixed ketone ………..
A. Pentanone
B. Acetophenone
C. Benzophenone
D. Butanone
Answer: A. Pentanone
195. Chloral is………..
A. CCl3CHO
B. CCl3COCCH3
C. CCl3COCCl3
D. CCl3CH2OH
Answer: C. CCl3COCCl3
196. Carbonyl compounds are usually ……………
A. Ethers, aldehydes, ketones and carboxylic acids
B. Aldehydes, ketones and carboxylic acids
C. Aldehydes and ketones
D. Carboxylic acids
Answer: C. Aldehydes and ketones
197. Acetone and acetaldehyde are …………..
A. Position isomers
B. Functional isomers
C. Not isomers
D. Chain isomers
Answer: C. Not isomers
198. Which of the aldehyde is most reactive ?
A. C6H5CHO
B. CH3CHO
C. HCHO
D. All the equally reactive
Answer: D. All the equally reactive
199. Acetophenone is prepared from
A. Rosenmund reaction
B. Sandmayer reaction
C. Wurtz reaction
D. Friedel craft reaction
Answer: D. Friedel craft reaction
200. Which one of the following compounds is prepared in the laboratory from benzene by a substitutionreaction………
A. Glyoxal
B. Cyclohexane
C. Acetophenone
D. Hexabromo cyclohexane
Answer: C. Acetophenone
201. Ketones where R =R1=1 alkyl group. It can be obtained in one step by
A. Hydrolysis of esters
B. Oxidation of primary alcohol
C. Oxidation of secondary alcohol
D. Reaction of acid halide with alcohols
Answer: C. Oxidation of secondary alcohol
202. The oxidation of toluene to benzaldehyde by chromyl chloride is called……..
A. Cannizzaro reaction
B. Wurtz reaction
C. Etard reaction
D. Reimer-Tiemann reaction
Answer: C. Etard reaction
203. Catalyst use in the reamer tiemman reaction.
A. LiAlH4
B. CuCl3
C. Ni / H2
D. Pd
Answer: B. CuCl3
204. Dry heating of calcium acetate gives
A. Acetaldehyde
B. Ethane
C. Acetic acid
D. Acetone
Answer: D. Acetone
205. Acetophenone is prepared by the reaction of which of the following in the presence of AlCl3catalyst……..
A. Phenol and acetic acid
B. Benzene and acetone
C. Benzene and acetyl chloride
D. Phenol and acetone
Answer: C. Benzene and acetyl chloride
206. Isopropyl alcohol on oxidation gives…….
A. Acetone
B. Acetaldehyde
C. Ether
D. Ethylene
Answer: A. Acetone
207. Which of the following compound gives a ketone with Grignard reagent .
A. Formaldehyde
B. Ethyl alcohol
C. Methyl cyanide
D. Methyl iodide
Answer: C. Methyl cyanide
208. Benzaldehyde can be prepared by oxidation of toluene by ………….
A. Acidic KMnO4
B. K2Cr2 O7
C. CrO2Cl2
D. All of these
Answer: C. CrO2Cl2
209. CH3 CO CH3 can be obtained by ………..
A. Heating acetaldehyde with methanol
B. Oxidation of propyl alcohol
C. Oxidation of isopropyl alcohol
D. Reduction of propionic acid
Answer: C. Oxidation of isopropyl alcohol
210. Propyne on hydrolysis in presence of HCl and HgSO4 gives………….
A. Acetaldehyde
B. Acetone
C. Formaldehyde
D. None of these
Answer: B. Acetone
211. Which of the following on reaction with NH3 gives urinary antiseptic compound.
A. HCHO
B. CH3 CHO
C. C6H5 CHO
D. C6H5CH3CHO
Answer: A. HCHO
212. The oxidation product of 2-propanol with hot conc. HNO3 is ………..
A. Ethanoic acid
B. Propanone
C. Propanal
D. None of these
Answer: B. Propanone
213. Ethyne on reaction with water in the presence of HgSO4 and H2SO4 gives……….
A. Acetone
B. Acetaldehyde
C. Acetic acid
D. Ethyl alcohol
Answer: B. Acetaldehyde
214. When a mixture of methane and oxygen is passed through heated molybdenum oxide, the mainproduct formed is………..
A. Methanoic acid
B. Ethanal
C. Methanol
D. Methanal
Answer: D. Methanal
215. Benzoin is………..
A. Compound containing an aldehyde and a ketonic group
B. α , ß -unsaturated acid
C. α-hydroxy aldehyde
D. α -hydroxy ketone
Answer: D. α -hydroxy ketone
216. The oxidation of benzyl chloride with lead nitrate gives……………
A. Benzyl alcohol
B. Benzoic acid
C. Benzaldehyde
D. p –chlorobenzaldehyde
Answer: C. Benzaldehyde
217. Glycerol reacts with potassium bisulphate to produce …………
A. Allyl iodide
B. Allyl sulphate
C. Acryl aldehyde
D. Glycerol trisulphate
Answer: C. Acryl aldehyde
218. The reagent used in Gatterman Koch aldehyde synthesis is………..
A. Pb/ BaSO4
B. Alkaline KMnO4
C. Acidic KMnO4
D. CO + HCl
Answer: D. CO + HCl
219. Reduction of Aldehydes and Ketones to hydrocarbon take place in the presence of ……………
A. Zn amalgam and HCl acid
B. Pb /BaSO4
C. Anhydrous AlCl3
D. Ni / Pt
Answer: A. Zn amalgam and HCl acid
220. Reduction ofCO to 2CH can be carried out with…………
A. Catalytic reduction
B. Na/ C2 H5 OH
C. Wolf-Kischner reduction
D. LiAlH4
Answer: C. Wolf-Kischner reduction
221. For C2H5 CHO which of the following is incorrect……….
A. On oxidation it yields benzoic acid
B. It is used in perfumery
C. It is an aromatic aldehyde
D. On reduction yields phenol
Answer: D. On reduction yields phenol
222. Grignard reagent on reaction with acetone forms………
A. Tertiary alcohol
B. Secondary alcohol
C. Acetic acid
D. Acetaldehyde
Answer: A. Tertiary alcohol
223. Which of the following is incorrect………….
A. FeCl3 is used in the detection of phenols
B. Fehling solution is used in the detection of glucose
C. Tollen’s reagent is used in detection of unsaturation
D. NaHSO3 is used in the detection of carbonyl compounds
Answer: C. Tollen’s reagent is used in detection of unsaturation
224. Consider the following statement Acetophenone can be prepared by…………
i. Oxidation of 1-phenylethanol
ii. Reaction of benzalthanol with methyl magnesium bromide
iii. Friedel craft’s reaction of benzene with acetyl chloride
iv. Distillation of calcium benzoate
A. 1 and 2
B. 1 and 4
C. 1 and 3
D. 3 and 4
Answer: C. 1 and 3
225. Which of the following products is formed when benzaldehyde is treated with CH3 MgBr and theaddition product so obtained is subjected to acid hydrolysis.
A. Secondary alcohol
B. A primary alcohol
C. Phenol
D. Tert-Butyl alcohol
Answer: A. Secondary alcohol
226. Aldol condensation will not be observed in……….
A. Chloral
B. Phenyl acetaldehyde
C. Hexanal
D. Ethanol
Answer: A. Chloral
227. Which of the following organic compounds exhibits positive Fehling test as well as iodoformtest………….
A. Methanal
B. Ethanol
C. Propanone
D. Ethanal
Answer: D. Ethanal
228. Which of the following will undergo aldol condensation………
A. Acetaldehyde
B. Propanaldehyde
C. Benzaldehyde
D. Trideuteroacetaldehyde
Answer: A. Acetaldehyde
229. Acetaldehyde cannot show …………….
A. Iodoform test
B. Lucas test
C. Benedict’s test
D. Tollen’s test
Answer: B. Lucas test
230. Benzaldehyde + Sodium hydroxide
A. Benzyl alcohol
B. Benzoic alcohol
C. Hydrobenzamide
D. Cinnamic acid
Answer: A. Benzyl alcohol
231. Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde.This reaction is known as ……………
A. Perkin’s reaction
B. Cannizzaro’s reaction
C. Sandmeyer’s reaction
D. Claisen condensation
Answer: B. Cannizzaro’s reaction
232. To distinguish between formaldehyde and acetaldehyde, we require……….
A. Tollen’s reagent
B. Fehling’s solution
C. Schiff’s reagent
D. Caustic soda solution
Answer: D. Caustic soda solution
233. Which of the following will not give iodoform test?
A. Ethanal
B. Ethanol
C. 2-propanone
D. 3-pentanon
Answer: D. 3-pentanon
234. Which of the following will not give the iodoform test ?
A. Acetophenone
B. Ethanal
C. Benzophenone
D. Ethanol
Answer: C. Benzophenone
235. Haloform test is given by the following substance……………
A. HCHO
B. (CH3)2 CO
C. CH3OCH3
D. CH3CH2Cl
Answer: B. (CH3)2 CO
236. Dimethyl ketones are usually characterized through………….
A. Tollen’s reagent
B. Iodoform test
C. Schiff’s test
D. Benedict’s reagent
Answer: B. Iodoform test
237. If formaldehyde and KOH heated then we gets,
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
Answer: C. Methyl alcohol
238. Acetaldehyde reacts with C2H5 MgCl the final product is…………
A. An aldehyde
B. A ketone
C. A primary alcohol
D. A secondary alcohol
Answer: D. A secondary alcohol
239. Aldol condensation of acetaldehyde involves the formation of which of the following intermediate?
A. Acetate ion
B. A carbanion
C. A carbonium ion
D. A free radical
Answer: B. A carbanion
240. Aromatic aldehyde undergo disproportionation in presence of sodium or potassium hydroxide to givecorresponding alcohol and acid. The reaction is known as …………..
A. Wurtz’s reaction
B. Cannizzaro reaction
C. Friedel-Craft’s reaction
D. Claisen reaction
Answer: B. Cannizzaro reaction
241. Which of the following does not give yellow precipitate with KINaOH…………
A. Acetone
B. Acetaldehyde
C. Benzaldehyde
D. Acetophenone
Answer: C. Benzaldehyde
242. Which of the following does not turn Schiff’s reagent to pink…………
A. Formaldehyde
B. Benzaldehyde
C. Acetone
D. Acetaldehyde
Answer: C. Acetone
243. Fehling’s test is positive for……….
A. Acetaldehyde
B. Benzaldehyde
C. Ether
D. Alcohol
Answer: A. Acetaldehyde
244. Acetaldehyde and acetone differ in their reaction with…………..
A. Sodium bisulphite
B. Ammonia
C. Phosphorus pentachloride
D. Phenyl hydrazine
Answer: B. Ammonia
245. The final product formed when acetaldehyde is reduced with sodium and alcohol is…………
A. Ethylene
B. Ethyl alcohol
C. Ethene
D. All of these
Answer: B. Ethyl alcohol
246. The compound obtained by the reduction of propionaldehyde by amalgamated zinc and concentratedHCl is…………….
A. Propanol
B. Propane
C. Propene
D. All of these
Answer: B. Propane
247. Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is knownas………..
A. Perkin reaction
B. Claisen reaction
C. Cannizzaro reaction
D. Knoevenagel reaction
Answer: C. Cannizzaro reaction
248. Acetaldehyde reacts with ……………
A. Electrophiles only
B. Nucleophiles only
C. Free radicals only
D. Both electrophiles and nucleophiles
Answer: B. Nucleophiles only
249. The typical reactions of aldehyde is………………….
A. Electrophilic addition
B. Nucleophilic substitution
C. Nucleophilic addition
D. Nucleophilic elimination
Answer: C. Nucleophilic addition
250. Which will not give acetamide on reaction with ammonia …………
A. Acetic acid
B. Acetyl chloride
C. Acetic anhydride
D. Methyl formate
Answer: D. Methyl formate
251. The addition of HCN to carbonyl compounds is an example of ……….
A. Nucleophilic substitution
B. Electrophilic addition
C. Nucleophilic addition
D. Electrophilic substitution
Answer: C. Nucleophilic addition
252. Which of the following reagents is used to distinguish acetone and Acetophenone?
A. NaHSO3
B. Grignard reagent
C. Na2SO4
D. NHCl4
Answer: A. NaHSO3
253. The product formed by the reaction of chlorine with benzaldehyde in the absence of a catalystis…………..
A. Chlorobenzene
B. Benzyl chloride
C. Benzoyl Chloride
D. o –Chlorobenzaldehyde
Answer: C. Benzoyl Chloride
254. Enol content is highest in…………..
A. Acetone
B. Acetophenone
C. Acetic acid
D. Acetyl acetone
Answer: D. Acetyl acetone
255. Which one of the following reacts with HCN and Tollen’s reagent, but is not oxidised by Fehling’ssolution……………
A. Methanal
B. Ethanal
C. Benzaldehyde
D. Acetone
Answer: C. Benzaldehyde
256. During reaction of benzaldehyde with alkali one of the product is…………
A. Phenol
B. Benzyl alcohol
C. Benzene
D. Benzophenone
Answer: B. Benzyl alcohol
257. Cannizzaro reaction is given by…………
A. HCHO
B. CH3COCH3CH
C. CH3CHO
D. CH3CH2OH
Answer: A. HCHO
258. When two molecules of acetaldehyde condense in the presence of dilute alkali, it forms………….
A. Acetal
B. Sodium formate
C. Aldol
D. Methylene
Answer: C. Aldol
259. Acetaldehyde and acetone can be distinguished by……………
A. Molisch test
B. Bromoform test
C. Solubility in water
D. Tollen’s test
Answer: D. Tollen’s test
260. Aldehyde turns pink with ………….
A. Benedict solution
B. Schiff reagent
C. Fehling solution
D. Tollen’s reagent
Answer: B. Schiff reagent
261. Boiling point of acetone is…………..
A. 56oC
B. 60 oC
C. 100o C
D. 90oC
Answer: A. 56oC
262. The reagent with which both aldehyde and acetone react easily is…………….
A. Fehling’s reagent
B. Grignard reagent
C. Schiff’s reagent
D. Tollen’s reagent
Answer: B. Grignard reagent
263. Acetal is obtained by reacting in the presence of dry HCl and alcohol with…………..
A. Aldehyde
B. Ketone
C. Ether
D. Carboxylic acid
Answer: A. Aldehyde
264. Which of the following is used to detect aldehydes…………..
A. Million’s test
B. Tollen’s reagent
C. Neutral ferric chloride solution
D. Molisch’s test
Answer: B. Tollen’s reagent
265. Which of the following aldehydes give red precipitate with Fehling solution ?
A. Benzaldehyde
B. Salicylaldehyde
C. Acetaldehyde
D. None of these
Answer: C. Acetaldehyde
266. Acetaldehyde and Acetone can be distinguished by………..
A. Iododorm test
B. Nitroprusside test
C. Fehling’s solution test
D. DNP test
Answer: C. Fehling’s solution test
267. Which of the following will fail to react with potassium dichromate and dilute sulphuricacid……………
A. Ethyl alcohol (ethanol)
B. Acetaldehyde (ethanal)
C. Secondary propyl alcohol (2-propanol)
D. Acetone (propanone)
Answer: D. Acetone (propanone)
268. The key step in cannizzaro’s reaction is the intermolecular shift of ……….
A. Proton
B. Hydride ion
C. Hydronium ion
D. Hydrogen bond
Answer: B. Hydride ion
269. A compound, containing only carbon, hydrogen and oxygen, has a molecular weight of 44. Oncomplete oxidation it is converted into a compound of molecular weight 60. The original compound is ?
A. An aldehyde
B. An acid
C. An alcohol
D. an ether
Answer: A. An aldehyde
270. Which of the following has the most acidic hydrogen?
A. 3-hexanone
B. 2, 4-hexanedione
C. 2, 5-hexanedione
D. 2, 3-hexanedione
Answer: B. 2, 4-hexanedione
271. Which of the following statements regarding chemical properties of acetophenone are wrong……
(1) It is reduced to methyl phenyl carbinol by sodium and ethanol
(2) It is oxidised to benzoic acid with acidified KMnO4
(3) It does not undergo iodoform electrophilic substitution like nitration at meta position
(4) It does not undergo iodoform reaction with iodine and alkali
A. 1 and 2
B. 2 and 4
C. 3 and 4
D. 1 and 3
Answer: C. 3 and 4
272. Which of the following will not give iodoform test ?
A. Isopropyl alcohol
B. Ethanol
C. Ethanal
D. Benzyl alcohol
Answer: D. Benzyl alcohol
273. What is color is Chloral hydrate?
A. Yellow
B. White
C. Colourless
D. None
Answer: C. Colourless
274. Aldol condensation is dose not ocurre between………..
A. Two different ketone
B. Two different aldehyde
C. An ketone and aldehyde
D. An aldehyde and ester
Answer: D. An aldehyde and ester
275. In which of the following reaction new carbon carbon bond is not formed?
A. Cannizzaro reaction
B. Friedel craft reaction
C. Wurtz reaction
D. Aldol condensation
Answer: A. Cannizzaro reaction
276. Aromatic aldehydes reduce…………
A. Tollen’s reagent
B. Benedict’s reagent
C. Fehling reagent
D. All of above
Answer: A. Tollen’s reagent
277. Cross Cannizzaro reaction is given by………..
A. C6H5CHO
B. C6H5CHO
C. CH3CHO
D. All of above
Answer: A. C6H5CHO
278. The product formed in aldol condensation is…………….
A. Beta hydroxy acid
B. Beta hydroxy aldehyde or ketone
C. Alpha, beta unsaturated ester
D. Alpha, hydroxy aldehyde or ketone
Answer: B. Beta hydroxy aldehyde or ketone
279. In which type of reaction cyanohydrin formed from acetone?
A. Nucleophilic substitution
B. Electrophilic substitution
C. Nucleophilic addition
D. Electrophilic addition
Answer: C. Nucleophilic addition
280. Which of the following react with water?
A. ClCH2CH2Cl
B. Cl3CCHO
C. CCl4
D. All of above
Answer: B. Cl3CCHO
281. What is carbonyl group?
A. OH
B. C=O
C. C- O
D. None of above
Answer: B. C=O