Alkene Reactions practice quiz
Ques. Addition of bromine to 1, 3-butadiene gives
(a) 1, 2 addition product only
(b) 1, 4 addition product only
(c) Both 1, 2 and 1, 4 addition products
(d) No reaction
Ques. 2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is
(a) 1-Butene
(b) 1-Butyne
(c) 2-Butene
(d) All of these
Ques. Electrolysis of cold concentrated aqueous solution of potassium succinate yields
(a) Ethane
(b) Ethyne
(c) Ethene
(d) Ethane-1, 2-diol
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Ques. Which of the following compounds represents acrylonitrile
(a) Vinyl cyanide
(b) Cyanoethene
(c) Prop-2-ene nitrile
(d) All of them
Ques. The final product formed when ethyl bromide is treated with excess of alcoholic KOH is
(a) Ethylene
(b) Ethane
(c) Ethyne
(d) Vinyl bromide
Ques. The only alcohol that can be prepared by the indirect hydration of alkene is
(a) Ethyl alcohol
(b) Propyl alcohol
(c) Isobutyl alcohol
(d) Methyl alcohol
Ques. The dehydrohalogenation of neopentyl bromide with alcoholic KOH mainly gives
(a) 2-methyl-1-butene
(b) 2-methyl-2-butene
(c) 2, 2-dimethyl-1-butene
(d) 2-butene
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Ques. During debromination of meso-dibromobutane, the major compound formed is
(a) n-butane
(b) 1-butane
(c) cis-2-butene
(d) trans-2-butene
Ques. Ethylene is a member of….. series
(a) Alkyne
(b) Olefin
(c) Paraffin
(d) Amine
Ques. Position of double bond in an organic compound is determined by
(a) Ozonolysis
(b) Oxidation
(c) Reduction
(d) Hydrogenation
Ques. Ethylene reacts with ozone to give
(a) Formaldehyde
(b) Ethyl alcohol
(c) Ozonide
(d) Acetaldehyde
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Ques. The name of the product obtained by the addition of HI to propene in presence of peroxide catalyst is
(a) Isopropyl iodide
(b) 2-Iodopropene
(c) 2-Iodopropane
(d) 1-Iodopropane
Ques. Decolourization of alkaline KMnO4 is used as a test for
(a) Aromatic hydrocarbons
(b) Olefinic hydrocarbons
(c) Acetylenic hydrocarbons
(d) Cycloalkanes
Ques. In a reaction, if half of the double bond is broken and two new bonds are formed, this is a case of
(a) Elimination
(b) Addition
(c) Displacement
(d) Rearrangement
Ques. PVC is obtained from vinyl chloride by a reaction called
(a) Addition
(b) Isomerization
(c) Polymerization
(d) Substitution
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Ques. When butene-1 is mixed with excess of bromine, the expected reaction product is
(a) 1, 2-dibromobutane
(b) 1, 1-dibromobutane
(c) 2, 2-dibromobutane
(d) Perbromobutane
Ques. Alkenes usually show which type of reaction
(a) Addition
(b) Substitution
(c) Elimination
(d) Superposition
Ques. n-propyl bromide on treatment with ethanolic potassium hydroxide produces
(a) Propane
(b) Propene
(c) Propyne
(d) Propanol
Ques. 1, 3-butadiene reacts with ethylene to form
(a) Benzene
(b) Cyclohexane
(c) Cyclohexene
(d) 2, 3 dimethyl butane
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Ques. Formation of 2-butene from 2-bromobutane is according to
(a) Markowikoff’s
(b) Bayer
(c) Saytzeff
(d) Wurtz
Ques. Ethylene is converted to X on passing through a mixture of an acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily take part in addition reaction with X
(a) Br2
(b) HBr
(c) HCl
(d) HCN
Ques. Baeyer’s reagent is used in the laboratory for
(a) Detection of double bonds
(b) Detection of glucose
(c) Reduction
(d) Oxidation
Ques. The halogen which is most reactive in the halogenation of alkenes under sunlight is
(a) Chlorine
(b) Bromine
(c) Iodine
(d) All equal
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Ques. Presence of peroxides affects the addition of
(a) HBr
(b) HCl
(c) HI
(d) All of these
Ques. On passing vapours of an organic liquid over finely divided Cu at 573 K the product was an alkene. This reaction is
(a) Catalytic oxidation of primary alcohol
(b) Catalytic dehydrogenation of secondary alcohol
(c) Catalytic dehydrogenation of tertiary alcohol
(d) Catalytic dehydration of tertiary alcohol
Ques. Which of the following has highest knocking property
(a) Aromatic hydrocarbons
(b) Olefins
(c) Branched chain paraffins
(d) Straight chain paraffins
Ques. One mole of each of the following alkenes is catalytically hydrogenated. The quantity of heat evolved will be the lowest in the case of
(a) 1-butene
(b) Trans-2-butene
(c) Cis-2-butene
(d) 1, 3-butadiene
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Ques. The product of acid catalyzed hydration of 2-phenyl propene is
(a) 3-phenyl-2-propanol
(b) 1-phenyl-2-propanol
(c) 2-phenyl-2-propanol
(d) 2-phenyl-1-propanol
Ques. Addition of bromine to 1, 3-butadiene gives
(a) 1, 4-addition product only
(b) 1, 2-addition product only
(c) Both 1, 2-and 1, 4 addition product
(d) None of these
Ques. Correct statement about1, 3-dibutene
(a) Conjugated double bonds are present
(b) Reacts with HBr
(c) Forms polymer
(d) All of these
Ques. The reagent which is used to distinguish between propene and propyne is
(a) Bromine
(b) Alkaline KMnO4
(c) Ammoniacal AgNO3
(d) Ozone
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Ques. Which of the following occurs easily in ethylene
(a) Addition
(b) Substitution
(c) Elimination
(d) Rearrangement
Ques. In paraffins, with the increasing molecular weight, it is found that
(a) Freezing point decreases
(b) Boiling point decreases
(c) Boiling point increases
(d) Vapour pressure decreases
Ques. Bayer’s reagent is used for detection of
(a) Amines
(b) Glucose
(c) Unsaturated bond
(d) Alcohol
