Hydrocarbons|Classification Of Hydrocarbons On Class 11th Notes|
1. In which among the following molecules is the distance between two adjacent carbon atoms largest
1. Benzene
2. Ethane
3. Ethene
4. Ethyene
Ans - 2 - Ethane
2. Synthetic ethanol is produced by reacting ethene (in the presence of phosphoric acid ) with
1. Hydrogen
2. Potassium dichromate
3. Oxygen
4. Water ( steam )
Ans - 4 - water (steam)
3. Which is the primary component of natural gas
1. Methane
2. Butane
3. Propene
4. Ethane
Ans - 1 - Methane
4. Which one of the following allotropes of the carbon is used in cutting and drilling :
1. Diamond
2. Graphite
3. Activated charcoal
4. Carbon black
Ans - 1 - Diamond
5. Which is the chemical formula of Marsh gas :
1. Ethane
2. Methane
3. Ammonia
4. Carbon dioxide
Ans - 2 - Methane
6. Which one of the following petroleum refinery products has the lowest boiling point :
1. Kerosene
2. Lubricating oil
3. Gasoline
4. Diesel
Ans - 3 - Gasoline
7. Which of the following is an active component of oil of clove ?
1. Menthol
2. Eugenol
3. Benzaldehyde
4. Methanol
Ans - 2 - Eugenol
8. Which of the following compounds caused tragedy of Bhopal in 1984 :
1. Phosphene
2. Methyl isocyanate
3. Carbon Monoxide
4. Methyl cyanate
Ans - 2 - Methyl isocyanate
9. Hinsberg's reagent is
1. Benzene sulphonamide
2. Benzene sulphonic acid
3. Benzene sulphuryl chloride
4. Benzene sulphonyl chloride
Ans - 4 - Benzene sulphonyl chloride
10. Aminea are more basic than
1. Alcohol
2. Ethers
3. Esters
4. All of these
Ans - 4 - all of these
11. Which are is the following is the weakest base ?
1. Trimethylamine
2. Diethylamine
3. Ethylamine
4. Ammonia
Ans - 1 - Trimethylamine
12. Garbriel phthalimide synthesis is used in the preparation
1. 1° amine
2. 2° amine
3. 3° amine
4. None
Ans - 1 - 1° amine
13. Fruity smell is given by
1. Esters
2. Alcohols
3. Chloroform
4. Acid anhydride
Ans - 1- Esters
14. Soaps can be classified as
1. Carbohydrates
2. Ethers
3. Salt of fatty acids
4. None
Ans - 3 - salt of fatty acids
15. End of detergent have
1. Ester group
2. Aldehyde
3. Amine group
4. Sodium sulphate
Ans - 4 - sodium sulphate
16. A fruity smell is produced by the reaction of ethanol with
1. PCl5
2. CH3COCH3
3. CH3COOH
4. None
Ans - 3 - CH3COOH
17. Sodium acetamide smell like
1. Garlic
2. Rotten egg
3. Pleasant
4. Reminiscent of mice
Ans - 4 - Reminiscent of mice
18. Paraffin wax is
1. An ester
2. A long chain acid
3. Monohydric alcohol
4. A mixture of higher alkanes
Ans - 4 - a mixture of higher alkanes
19. Fat is
1. A lipid
2. A protein
3. A carbohydrate
4. An amino acids
Ans - 1 - a lipid
20. Candles contains a mixture of
1. Bees wax and paraffin wax
2. Bees wax and stearic acid
3. Paraffin wax and stearic acid
4. Higher fatty acid
Ans - 3 - paraffin wax and stearic acid
21. Bees wax is
1. Myricyl palmitate
2. Myricyl stearate
3. Myricyl oleate
4. Mixture of higher hydrocarbon
Ans - 1 - myricyl palmitate
22. Soft soaps are
1. Sodium salt
2. Calcium salt
3. Magnesium salt
4. Potassium salt
Ans - 4 - potassium salt
23. The process by which vegetable ghee is manufactured is known as
1. Saponification
2. Hydrogenation
3. Esterification
4. Hydrolysis
Ans - 2 - hydrogenation
24. In the hydrogenation of oil
1. Ni acts as a promoter
2. Cu acts as a catalyst
3. Tellurium acts as a promoter
4. Ni acts as a catalyst
Ans - 4 - Ni acts as a catalyst
25. An example of heterocyclic compound is :
1. Benzene
2. Anthracene
3. Naphthalene
4. Furan
Ans - 4 - Furan
26. A detergent is a
1. Cleansing agent
2. Drug
3. Catalyst
4. Soap
Ans - 1 - cleansing agent
27. An aqueous solution of urea is
1. Acidic
2. Basic
3. Neutral
4. Amphoteric
Ans - 3 - neutral
28. Urea is a
1. Monobasic acid
2. Dibasic acid
3. Monoacid base
4. Diacid base
Ans - 3 - monoacid base
29. Urea is converted into ammonia and carbon dioxide by the enzyme
1. Diastase
2. Urease
3. Lipase
4. Amylase
Ans - 2 - urease
30. The percentage of nitrogen in urea it
1. 46
2. 23
3. 48
4. 52
Ans - 1 - 46
31. The reverse of esterification process is called
1. Neutralisation
2. Hydrolysis
3. Acidolysis
4. Alcoholysis
Ans - 2 - hydrolysis
32. The reaction between acid and alcohol is known as
1. Esterification
2. Saponification
3. Hydrolysis
4. Hydrogenation
Ans - 1 - esterification
33. Natural rubber is a polymer of
1. Isoprene
2. Styrene
3. Vinyl acetate
4. Propene
Ans - 1 - isoprene
34. Oxalic acid is used :
Ans - 1. For removing ink stains
2. For the lab Preparation of formic acid and allyl alcohol
3. As a mardant in dyeing and calico - printing.
35. Which of the following reagents can be used to test carboxylic group ?
Ans - 1. NaHCO3
2. FeCl3
3. Alcohol in presence of conc. H2SO4.
36. Which of the following is the strongest acid ?
1. HOCl
2. HClO3
3. HClO2
4. HClO4
Ans - 4 - HClO4
37. Cyanogen on hydrolysis with dil. HCl gives -
1. Formic acid
2. Acetic acid
3. Glycol
4. Oxalic acid
Ans - 4 - oxalic acid
38. Vinegar contains
1. 100% acetic acid
2. 10% - 20 % acetic acid
3. 1% acetic acid
4. 7 - 8 % acetic acid
Ans - 4 - 7- 8 % acetic acid
39. Rochelle's salt is -
1. Sodium potassium tartrate
2. Sodium tartrate
3. Potassium tartrate
4. Sodium tartrate
Ans - 1 - sodium potassium tartrate
40. Which is tribasic acid -
1. Succinic acid
2. Tartaric acid
3. Citric acid
4. Valeric acid
Ans - 3 - citric acid
41. Tamarind contains -
1. Tartaric acid
2. Lactic acid
3. Citric acid
4. Succinic acid
Ans - 1 - tartaric acid
42. Lactic acid is -
1. Propionic acid
2. a-hydroxy propionic acid
3. B-hydroxy propionic acid
4. None
Ans - 2 - a-hydroxy propionic acid
43. Adipic acid is a -
1. Dibasic acid
2. Tribasic acid
3. Monobasic acid
4. Tetrabasic acid
Ans - 1 - dibasic acid
44. Which of the following is used in synthetic lemonade ?
1. Tartaric acid
2. Acetic acid
3. Citric acid
4. Oxalic acid
Ans - 3 - Citric acid
45. Which one of the following is used to remove ink and rust stains on cloth ?
1. Oxalic acid
2. Alcohol
3. Ether
4. Kerosene oil
Ans - 1 - oxalic acid
46. Fehling's solution is -
1. Acidified copper sulphate solution
2. Ammoniacal cuprous chloride solution
3. Copper sulphate and Rochelle salt + NaOH
4. None
Ans - 3 - Copper sulphate and Rochelle salt + NaOH
47. A plastic bakelite is a compound of HCHO with -
1. Benzene
2. Phenol
3. Ammonia
4. Hydrocarbon
Ans - 2 - Phenol
48. Urotropine is formed by the action of ammonia on -
1. Acetaldehyde
2. Formaldehyde
3. Acetone
4. Phenol
Ans - 2 - Formaldehyde
49. Parraldehyde is formed by the polymerisation of -
1. CH3CHO
2. HCHO
3. CH3OH
4. (Ch3)2CO
Ans - 1
50. Which of the following is used as a hypnotic ?
1. Paraldehyde
2. Metaldehyde
3. Acetaldehyde
4. Formaldehyde
Ans - 1 - Paraldehyde
51. Paraldehyde is used to -
1. Medicine
2. Poison
3. Polymer
4. Dye
Ans - 1 - Medicine
52. Acetone on condensation with chloroform in presence of caustic potash forms -
1. Chloretone
2. Trichloronitromethane
3. 1, 1, 1- trichloro - 2 methyl propan - 2 - ol
4. Chloropicrin
Ans - 1 - Chloretone
53. Which of the following is not a fatty acid ?
1. Stearic acid
2. Palmitic acid
3. Propionic acid
4. Phenyl acetic acid
Ans - 4 - Phenyl acetic acid
54. Lemon is sour due to
1. Citric acid
2. Tartaric acid
3. Oxalic acid
4. Acetic acid
Ans - 1 - Citric acid
55. Which of the following acids is present in vinegar ?
1. Hydrochloric acid
2. Acetic acid
3. Tartaric acid
4. Citric acid
Ans - 2 - Acetic acid
56. Which one among the following fuels is used in gas welding ?
1. LPG
2. Ethylene
3. Methane
4. Acetylene
Ans - 2 - Ethylene
57. Fermentation of ethyl alcohol into acetic acid is done by -
1. Zymase
2. Diastase
3. Maltase
4. Bacterium mycoderma aceti
Ans - 4 - Bacterium mycoderma aceti
58. Pyroligneous acid contains
1. 2% acetic acid
2. 50% acetic acid
3. 10% acetic acid
4. 20% acetic acid
Ans - 3 - 10% acetic acid
59. When formic acid reacts with PCl5 , it forms -
1. Acetyl chloride
2. Formyl chloride
3. Methyl chloride
4. Propionyl chloride
Ans - 4 - Propionyl chloride
60. A sample of chloroform before using as an anaesthetic , is tested by -
1. Fehling's solution
2. Ammoniacal cuprous chloride
3. Ammoniacal silver nitrate solution
4. Silver nitrate solution after boiling with alcoholic KOH
Ans - 3 - Ammoniacal silver nitrate solution
61. Acetone is mixed with bleaching powder to give -
1. Chloroform
2. Acetaldehyde
3. Ethanol
4. Phosgene
Ans - 1 - Chloroform
62. Alcohol obtained in the saponification process is -
1. Ethyl alcohol
2. Methyl alcohol
3. Wood spirit
4. Glycerol
Ans - 1 - Ethyl alcohol
63. Chlorofluorocarbons are widely used in
1. Micro ovens
2. Solar heaters
3. Washing machines
4. Refrigerators
Ans - 4 - Refrigerators
64. Rectified spirit contains -
1. 75% alcohol
2. 95.5% alcohol
3. 56% alcohol
4. 100% alcohol
Ans - 2 - 95.5% alcohol
65. Wine contains :
1. Methanol
2. Ethanol
3. Propanol
4. Glucose
Ans - 2 - Ethanol
66. Fermentation is an -
1. Endothermic reaction
2. Exothermic reaction
3. Polymerisation reaction
4. Condensation reaction
Ans - 2 - Exothermic reaction
67. Glucose and fructose are converted into ethanol in presence of -
2. Invertase
2. Diastase
3. Zymase
4. Lipids
Ans - 3 - Zymase
68. Grain alcohol is common name of
1. Amyl alcohol
2. Ethyl alcohol
3. Methanol
4. None
Ans - 2 - Ethyl alcohol
69. Wood spirit is known as
1. Ethanol
2. Methanol
3. Acetone
4. Benzene
Ans - 2 - Methanol
70. Ethanol containing some methanol is called -
1. Methylated spirit
2. Rectified spirit
3. Absolute spirit
4. None
Ans - 1 - Methylated spirit
71. Rectified spirit can be dried with
1. Conc. Sulphuric acid
2. Calcium oxide
3. Anhydrous calcium chloride
4. Slaked lime
Ans - 2 - Calcium oxide
72. Power alcohol is -
1. Absolute alcohol + methyl alcohol
2. Absolute alcohol + petrol
3. Rectified alcohol + petrol
4. Denatured alcohol + petrol
Ans - 2 - Absolute alcohol + petrol
73. The explosive nitroglycerine is
1. An ester
2. A salt
3. A soap
4. A complex compound
Ans - 1 - An ester
74. Which of the following compounds is commonly used as antifreeze in automobile radiators ?
1. Methanol
2. Ethanol
3. Glycerol
4. All
Ans - 3 - Glycerol
75. In cold countries , ethylene glycol is added in the water used in the radiators of cars during winter. This results in -
1. Lowering in freezing point
2. Reducing the viscosity
3. Reducing the specific heat
4. Making water a better conductor of electricity
Ans - 1 - Lowering in freezing point
76. The group reagent for the test of alcohol is -
1. Ceric ammonium nitrate
2. Schiff's reagent
3. Molisch's reagent
4. Bromine water
Ans - 1 - Ceric ammonium nitrate
77. The most important ingredient of dynamite is -
1. Nitrobenzene
2. Picric acid
3. Nitroglycerine
4. TNT
Ans - 3 - Nitroglycerine
78. Denatured spirit is mainly used as a
1. Drug
2. Good fuel
3. Material in prepairing
4. Solvent in prepairing varnishes
Ans - 4 - Solvent in prepairing varnishes
79. Which of the following is generally present in tonics :
1. Ethanol
2. Ether
3. Ethanol
4. Chloral
Ans - 1 - Ethanol
80. Dynamite is prepared by mixing nitroglycerine with -
1. Saw dust and ammonium nitrate
2. Cellulose nitrate
3. Saw dust alone
4. Conc. Sulphuric acid
Ans - 1 - Saw dust and ammonium nitrate
81. Liquor poisoning is due to the presence of -
1. Methyl alcohol
2. Ethyl alcohol
3. Carbonic acid
4. Bad compound in liquor
Ans - 1 - Methyl alcohol
82. An enzyme which changes maltose into glucose is known as known as
1. Zymase
2. Maltose
3. Invertase
4. Diastase
Ans - 2 - Maltose
83. Methylated spirit is
1. 100% alcohol
2. 95.6% alcohol + 4.4% water
3. 90% alcohol + 9% methanol + pyridine
4. Power alcohol
Ans - 3 - 90% alcohol + 9% methanol + pyridine , etc
84. Denatured spirit is a mixture of ethyl alcohol , methyl alcohol and
1. Acetic acid
2. Pyridine
3. Acetone
4. Water
Ans - 2 - Pyridine
85. Schiff's reagent is -
1. Magenta solution decolourised with sulphurous acid
2. Magenta solution decolourised with chlorine
3. Ammoniacal cobalt chloride solution
4. Ammoniacal manganese sulphate solution
Ans - 1 - Magenta solution decolourised with sulphurous acid
86. Tollen' s reagent is :
1. Alkaline mercuric chloride
2. Alkaline potassium permanganate
3. Ammoniacal silver nitrate
4. Ammonium citrate
Ans - 3 - Ammoniacal silver nitrate
87. Formaline is the commercial name of
1. Formic acid
2. Fluoroform
3. 40% aqueous solution of methanol
4. Paraformaldehyde
Ans - 3 - 40% aqueous solution of methanol
88. At room temprature, formaldehyde is
1. A gas
2. A liquid
3. A solid
4. Not known
Ans - 1 - A gas
89. The grouping >CO is present in
1. Ethers
2. Alcohols
3. Ketones
4. None
Ans - 3 - Ketones
90. Ether show isomerism with
1. Alcohol
2. Acid
3. Halide
4. Aldehyde
Ans - 1 - Alcohol
91. Epichlorohydrin is -
1. 3 - chloropropane
2. 3 - chloroprapan -1- ol
3. 2 - chloromethyl oxirane
4. None
Ans - 3 - 2 - chloromethyl oxirane
92. When ether is exposed in air for sometime , an explosive substance is produced , the substance is
1. Peroxide
2. TNT
3. Oxide
4. Superoxide
Ans - 1 - Peroxide
93. In [18] -- crown -- 6 , the number of oxygen atoms is
1. 18
2. 6
3. 12
4. 24
Ans - 2
94. Crown ethers are
1. Cyclic ethers
2. Ethers with several other functional groups
3. Mixed ethers
4. Not ethers
Ans - 1 - Cyclic ethers
95. The optimum temprature for carrying out fermentation of molasses is -
1. 0°C
2. 30°C
3. 60°C
4. 100°C
Ans - 2
96. The factor adversely affecting the fermentation process is
1. Presence of air
2. Low concentration of sugar
3. High concentration of sugar
4. Presence of an enzyme
Ans - 3 - High concentration of sugar
97. Chloropicrin is
1. Picric derivative
2. Nitrochloroform
3. Nitromethane
4. Nitro ethyl chloride
Ans - 2 - Nitrochloroform
98. Chemical name of Gammaxane is :
1. Aniline
2. Toluene
3. Benzene hexachloride
4. Chloro benzene
Ans - 3 - Benzene hexachloride
99. Reforming is the process used for
1. Preparation of hydrocarbon
2. Increasing the octane number
3. Preparation of straight chain
4. Preparation of aromatic heterocyclic compounds
Ans - 2 - Increasing the octane number
100. Acetylene is used as an anaesthetic under the name of -
1. Narcylene
2. Pyrene
3. Neopyrene
4. pyroline
Ans - 1 - Narcylene
101. Lindlar's catalyst is
1. Pt in ethanol
2. Pd + barium sulphate
3. Ni in ethanol
4. Na in liquid ammonia
Ans - 2 - Pd + barium sulphate
102. The presence of unsaturation in an organic compound can be tested with -
1. Schiff's reagent
2. Tollen's reagent
3. Fehling's solution
4. Baeyer's reagent
Ans - 4 - Baeyer's reagent
103. The maximum C---C bond length is in
1. Ethane
2. Ethene
3. Ethyne
4. Methane
Ans - 1 - ethane (C2H6)
104. The gas , which is used for welding purposes is -
1. CH4
2. C2H6
3. C2H4
4. C2H2
Ans - 4
105. The gas , which is used for artificial ripening of fruit , is
1. Methane
2. Ethene
3. Ethane
4. None
Ans - 2
106. The name of the poisonous gas formed by the interaction of acetylene and arsenic trichloride is
1. Phosgene
2. Lewisite
3. Mustard gas
4. Weston
Ans - 2 - Lewisite
107. Benzene is a polymer of
1. Methane
2. Acetylene
3. Ethane
4. Ethylene
Ans - 2 - Acetylene
108. Ethylene reacts with sulphur monochloride to form
1. Ethyl chloride
2. Ethylene chloride
3. Mustard gas
4. Ethylidene chloride
Ans - 3 - Mustard gas
109. Acidic hydrogen is present in
1. Ethyne
2. Ethene
3. Benzene
4. Ethane
Ans - 1 - Ethyne
110. Baeyer's reagent is
1. Alkaline potassium permanganate solution
2. Acidic potassium permanganate solution
3. Neutral potassium permanganate solution
4. Aqueous bromine solution
Ans - 1 - Alkaline potassium permanganate solution
111. The most reactive hydrocarbon is
1. Ethene
2. Ethyne
3. Ethane
4. Methane
Ans - 1 - Ethene
112. Which of the following has highest knocking property ?
1. Aromatic hydrocarbon
2. Olefins
3. Branched chain paraffins
4. Straight chain paraffins
Ans - 4 - Straight chain paraffins
113. The geometry of methane molecule is
1. Tetrahedral
2. Pyramidal
3. Octahedral
4. Square planer
Ans - 1 - Tetrahedral
114. Which hydrocarbon is mainly present in gobar gas ?
1. Butane
2. Propane
3. Methane
4. Ethane
Ans - 3 - Methane
115. Octane number is zero for
1. Iso-heptane
2. n-heptane
3. Iso-octane
4. n-octane
Ans - 2 - n-heptane
116. Catalytic reduction of water gas gives
1. Acetylene
2. Ethylene
3. Ethane
4. Methane
Ans - 4 - Methane
117. Adam's catalyst is
1. Platinum metal
2. Palladium
3. Nickle metal
4. Platinum oxide
Ans - 4 - Platinum oxide (PtO2)
118. Liquid hydrocarbon is converted into a mixture of gaseous hydrocarbon by
1. Cracking
2. Hydrolysis
3. Oxidation
4. Distillation
Ans - 1 - Cracking
119. Paraffin dissolves in
1. Distilled water
2. Methanol
3. Benzene
4. Salt water
Ans - 3 - Benzene
120. Domestic cooking gas consists of mostly
1. Methane and ethane
2. Liquified butane and iso-butane
3. Ethylene and carbon monoxide
4. Hydrogen and acetylene
Ans - 2 - Liquified butane and iso-butane
121. The flash point in India is fixed at
1. 44°C
2. 35°C
3. 22.8°C
4. 30°C
Ans - 1 - 44°C
122. Fisher - Tropsch process is used in the manufacture of
1. Ethane
2. Benzene
3. Synthetic petrol
4. LPG
Ans - 3 - Synthetic petrol
123. Octane Number of gasoline can be increased by addition of BTX. BTX stands for -
1. Butane , tetraethyl lead and xylene
2. Butane , tetramethyl lead , and xylene
3. Benzene , toluene and xylene
4. Benzene , tetraethyl lead and xylene
Ans - 3 - Benzene , toluene and xylene
124. Purification of petroleum is carried out by the following method :
1. Fractional distillation
2. Steam distillation
3. Vacuum distillation
4. Simple distillation
Ans - 1 - Fractional distillation
125. Paraffin wax is
1. Ester
2. Alcohol
3. Unsaturated hydrocarbons
4. Saturated hydrocarbons
Ans - 4 - Saturated hydrocarbons
126. Which of the following is not linked with methane ?
1. Marsh gas
2. Natural gas
3. Producer gas
4. Coal gas
Ans - 3 - Producer gas
127. Which of the following compounds has been given an octane number of 100 ?
1. n-hexane
2. Iso-octane
3. Neo-pentane
4. Neo-octane
Ans - 2 - Iso-octane
128. Octane number of a fuel can be increased by
1. Isomerisation
2. Alkylation
3. Reforming
4. All
Ans - 4
129. The thermal decomposition of alkanes is known as
1. Cracking
2. Isomerisation
3. Dehydration
4. Reforming
Ans - 1 - Cracking
130. Ethanol containing 5% water is known as
1. Absolute alcohol
2. Dilute alcohol
3. Power alcohol
4. Rectified spirit
Ans - 4 - Rectified spirit
131. The fraction obtained between temprature 150-300°C during fractional distillation of crude petroleum is
1. Paraffin wax
2. Heavy oil
3. Kerosene
4. Naphtha
Ans - 3 - Kerosene
132. Petroleum consists of
1. Aliphatic hydrocarbons
2. Aliphatic alcohols
3. Aromatic derivatives
4. None
Ans - 1 - Aliphatic hydrocarbons
133. Iso-octane is added to petrol :
1. To precipitate inorganic material
2. To prevent freezing of petrol
3. To increase the boiling point
4. As an anti knocking agent
Ans - 1 - As an anti knocking agent
134. Petroleum is found
1. On the surface of the earth
2. In the atmosphere
3. In arctic ocean
4. Deep under the surface of the earth
Ans - 4 - Deep under the surface of the earth
135. The knocking will be minimum when the mixture of fuel is :
1. Straight chain
2. Iso-carbonation
3. Neo-carbonation
4. None
Ans - 3 - Neo-carbonation
136. Knocking sound is produced in the engine when the fuel contains :
1. Water
2. Lubricating oil
3. Straight-chained hydrocarbon
4. Iso-carbon atoms
Ans - 3 - Straight-chained hydrocarbon
137. Most of hydrocarbons from petroleum are obtained by
1. Fractional distillation
2. Fractional crystallisation
3. Vaporisation
4. Isomerisation
Ans - 1 - Fractional distillation
138. Kerosene is a mixture of
1. Aromatic hydrocarbons
2. Aliphatic hydrocarbons
3. Saturated hydrocarbons
4. Alicyclic hydrocarbons
Ans - 2 - Aliphatic hydrocarbons
139. What is the volume of oxygen required for the complete combustion of 4 litres of ethane :
1. 4 litre
2. 8 litre
3. 12 litre
4. 14 litre
Ans - 4
140. Carbon black is obtained when methane is
1. Heated in absence of air
2. Heated in presence of nitrogen
3. Heated in presence of ammonia
4. Heated with steam
Ans - 1 - Heated in absence of air
141. Saturated hydrocarbons undergo
1. Substitution reaction
2. Addition reaction
3. Polymerisation reaction
4. Condensation reaction
Ans - 1 - Substitution reaction
142. When water vapours are passed over aluminium carbide , we get
1. Acetaldehyde
2. Ethylene
3. Methane
4. Methyl alcohol
Ans - 3 - Methane
143. The compound with the highest boiling point is
1. n-pentane
2. 2 -methylbutane
3. n-hexane
4. 2,2-dimethylpropane
Ans - 3 - n-hexane
144. Marsh gas mainly contains
1. Ethene
2. Methane
3. Hydrogen sulphide
4. Carbon Monoxide
Ans - 2 - Methane
145. Which of the following is a chiral carbon :
1. Methane
2. Methane iodide
3. Choloromethane
4. Methyl iodo bromo chloride
Ans - 4 - Methyl iodo bromo chloride
146. The name fire damp is given to
1. Methane
2. Ethane
3. Propane
4. Butane
Ans - 1 - Methane
147. How many chiral carbon atoms present in glucose molecule ?
1. 4
2. 3
3. 2
4. 1
Ans - 1
148. Chiral molecules are those which are
1. Superimposable on their mirror image
2. Not superimposable on their mirror image
3. Unstable molecules
4. Capable of showing geometrical isomerism
Ans - 2 - Not superimposable on their mirror image
149. Optical isomerism is shown by
1. Oxalic acid
2. Benzoic acid
3. Acetic acid
4. Lactic acid
Ans - 4 - Lactic acid
150. Optical isomerism is exhibited by the compound which contains
1. At least one double bond
2. At least one triple bond
3. At least one symmetric carbon arom
4. At least one polar group
Ans - 3 - At least one symmetric carbon arom
0 Comments