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Quiz 204
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4061. Which compound is obtained by the dehydrohalogenation of bromopropane?
Propene
Butene
Ethene
Propane
4062. Bromination of alkene is shown in following reactions. This reaction is used for:
Detection of ketones
Identification of primary and secondary alcohols
Detection of double bond
Detection of aldehydes
4063. If carboxylic acid and ketone groups (C=O) are present in a chain, then the final name will be given as:
oxo, oic acid
Both 1 and 2
one, oic acid
None of these
4064. The addition reaction of 2-butene with HBr produces:
1-bromobutane
2-bromobutane
1,3-dibromobutane
2,3-dibromobutane
4065. Addition of HBr to isobutylene mainly gives:
Isobutyl bromide
Sec-butyl bromide
n-butyl bromide
tert-butyl bromide
4066. Dehydrohalogenation of alkylhalide is carried out in presence of :
Alcoholic KOH
Concentrated H2SO4
Aqueous KOH
Zn Dust
4067. Alkenes can be prepared from alcohols by:
Dehydration
Dehydrohalogenation
Dehydrohalogenation
Halogenation
4068. Mustard gas is the product of addition reaction of:
Ethane
Ethyne
Ethene
Ethyl alcohol
4069. Polymerization of ethene occurs at:
400°C & 2 atm pressure
200°C and 100 atm pressure
400°C and 100 atm pressure
250°C and 50 atm pressure
4070. Ethylene glycols are used as:
Anesthetic
Knocking agent
Freezing agent
Anti-freezing agent
4071. Which of the following compound is more acidic?
Alkane
Alkene
Alkyne
Cycloalkane
4072. Identify which method is used to prepare Alkynes?
Dehalogenation of vicinal dihalides
Dehydration of alcohol in the presence of Al₂O₃ at 340–450°C
Electrolysis of dicarboxylic acid salt
Dehalogenation of vicinal dihalides in the presence of strong base
4073. Which of the following reagents can be used to distinguish between 1-pentyne and 2-pentyne?
AgNO₃ + NH₄OH
Br₂/CCl₄
1% alkaline KMnO₄
K₂Cr₂O₇ + H₂SO₄
4074. Which compound is least reactive?
Ethane
Ethene
Benzene
Ethyne
4075. The correct order of reactivity of hydrocarbons is:
Alkanes > Alkynes > Alkenes
Alkenes > Alkanes > Alkynes
Alkenes > Alkanes > Alkynes
Alkenes > Alkynes > Alkanes
4076. Propyne reacts with aqueous sulfuric acid in the presence of HgSO₄ to form:
Acetone
1-Propanol
2-Propanol
Acetaldehyde
4077. In the following molecules, which one has the shortest C–C bond length?
C₂H₆
C₂H₄
C₆H
C₂H₂
4078. Which method is generally used to prepare alkynes?
Dehydrohalogenation of vicinal dihalides
Hydrolysis
Hydrogenation of alkene
Hydration of alkene
4079. Acetylene reacts with H₂SO₄ and HgSO₄ to form:
Enolate
Acetaldehyde
Acetone
Formaldehyde
4080. Benzene in the presence of AlCl₃ produces acetophenone when it reacts with:
Acetyl chloride
Acetic acid
Ethyl benzene
Ethanoic acid
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