50+ JEE Mains MCQ Questions Hydrocarbons with Solutions

Preparing for the Joint Entrance Exam (JEE) can be a daunting task. With so many subjects to cover and so many topics to study, it can be challenging to know where to start. One essential topic in the JEE Mains syllabus is Hydrocarbons. In this article, we will provide 50+ MCQ questions on the Hydrocarbons, along with detailed solutions to help you prepare for the JEE Mains exam.

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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Hydrocarbons JEE Mains MCQ Questions with Answers.

Hydrocarbons JEE Mains MCQ

Which of the following hydrocarbons has the highest boiling point?
a) Methane
b) Ethene
c) Propane
d) Butane

Answer: d) Butane Explanation: Boiling point increases with increasing molecular weight, so butane, with four carbon atoms, has the highest boiling point among the given options.

Which of the following reactions is an example of electrophilic substitution reaction?
a) Addition of HBr to ethene
b) Oxidation of ethanol to ethanoic acid
c) Halogenation of benzene
d) Dehydration of an alcohol

Answer: c) Halogenation of benzene Explanation: Electrophilic substitution reactions involve the replacement of an atom or group in a molecule by an electrophile. Halogenation of benzene is an example of such a reaction.

Which of the following compounds is an aromatic hydrocarbon?
a) Ethane
b) Ethene
c) Benzene
d) Butane

Answer: c) Benzene Explanation: Benzene is a cyclic aromatic hydrocarbon characterized by a ring of six carbon atoms with alternating double bonds.

Which of the following hydrocarbons exhibits geometric isomerism?
a) Ethane
b) Ethene
c) Propene
d) Butene

Answer: b) Ethene Explanation: Ethene (C2H4) has a double bond between two carbon atoms, allowing rotation around the bond and leading to geometric isomerism.

What is the hybridization of carbon atoms in ethyne (acetylene)?
a) sp
b) sp2
c) sp3
d) sp3d

Answer: a) sp Explanation: Ethyne (acetylene) contains a triple bond between two carbon atoms, which requires sp hybridization to accommodate the three sigma bonds.

Which of the following compounds is an example of an alkane?
a) Ethene
b) Ethyne
c) Ethane
d) Ethanol

Answer: c) Ethane Explanation: Ethane is an example of an alkane, which is a hydrocarbon with only single bonds between carbon atoms.

Which of the following hydrocarbons is commonly known as “wood alcohol”?
a) Methane
b) Methanol
c) Ethane
d) Ethanol

Answer: b) Methanol Explanation: Methanol (CH3OH) is commonly known as “wood alcohol” and is used as a solvent and fuel.

Which of the following reactions is an example of a combustion reaction?
a) Dehydration of an alcohol
b) Halogenation of an alkene
c) Addition of hydrogen to an alkyne
d) Burning of methane in air

Answer: d) Burning of methane in air Explanation: Combustion reactions involve the reaction of a substance with oxygen, producing heat and often light. Burning of methane in air is an example of combustion.

Which of the following hydrocarbons is a primary component of natural gas?
a) Methane
b) Ethane
c) Propane
d) Butane

Answer: a) Methane Explanation: Methane (CH4) is the primary component of natural gas, a fossil fuel.

Which of the following hydrocarbons is used as a refrigerant?
a) Ethane
b) Ethene
c) Propane
d) Butane
.

Answer: c) Propane Explanation: Propane (C3H8) is commonly used as a refrigerant due to its low boiling point

Which of the following hydrocarbons is used as a fuel in cigarette lighters?
a) Methane
b) Ethane
c) Propane
d) Butane

Answer: d) Butane Explanation: Butane (C4H10) is commonly used as a fuel in cigarette lighters.

Which of the following compounds is an example of an unsaturated hydrocarbon?
a) Cyclohexane
b) Cyclohexene
c) Cyclohexanol
d) Cyclohexanone

Answer: b) Cyclohexene Explanation: Cyclohexene contains a double bond between two carbon atoms, making it an unsaturated hydrocarbon.

Which of the following hydrocarbons is used as a solvent for dry cleaning?
a) Methane
b) Ethane
c) Propane
d) Tetrachloroethylene

Answer: d) Tetrachloroethylene Explanation: Tetrachloroethylene (C2Cl4) is commonly used as a solvent for dry cleaning.

Which of the following compounds is an example of a cyclic hydrocarbon?
a) Methane
b) Ethane
c) Cyclohexane
d) Butane

Answer: c) Cyclohexane Explanation: Cyclohexane is a cyclic hydrocarbon with a ring of six carbon atoms.

Which of the following hydrocarbons is used as a fuel in portable stoves?
a) Methane
b) Ethane
c) Propane
d) Butane

Answer: c) Propane Explanation: Propane is commonly used as a fuel in portable stoves due to its high energy content and ease of storage.

Which of the following compounds is an example of an aromatic hydrocarbon?
a) Ethene
b) Ethyne
c) Toluene
d) Ethanol

Answer: c) Toluene Explanation: Toluene is an aromatic hydrocarbon commonly used as a solvent and starting material in the production of various chemicals.

Which of the following hydrocarbons is commonly used as a raw material in the production of plastics?
a) Ethene
b) Ethyne
c) Propene
d) Butene

Answer: a) Ethene Explanation: Ethene is commonly used as a raw material in the production of plastics, such as polyethylene.

Which of the following reactions is an example of a polymerization reaction?
a) Combustion of a hydrocarbon
b) Addition of hydrogen to an alkene
c) Halogenation of an alkane
d) Polymerization of ethene

Answer: d) Polymerization of ethene Explanation: Polymerization reactions involve the joining of monomer units to form a polymer chain. Polymerization of ethene leads to the formation of polyethylene.

Which of the following hydrocarbons is an example of an alkyne?
a) Ethane
b) Ethene
c) Ethyne
d) Ethanol

Answer: c) Ethyne Explanation: Ethyne (C2H2) is an alkyne, characterized by a triple bond between two carbon atoms.

Which of the following hydrocarbons is an example of an alkyl halide?
a) Methane
b) Ethane
c) Chloroethane
d) Ethanol

Answer: c) Chloroethane Explanation: Chloroethane (C2H5Cl) is an alkyl halide, where a halogen atom (chlorine) is attached to a carbon atom.

Which of the following reactions is an example of a substitution reaction?
a) Addition of HBr to an alkene
b) Oxidation of an alcohol to a ketone
c) Combustion of a hydrocarbon
d) Halogenation of an alkane

Answer: d) Halogenation of an alkane Explanation: Halogenation of an alkane involves the substitution of a hydrogen atom with a halogen atom, making it a substitution reaction.

Which of the following hydrocarbons is commonly used as a fuel for vehicles?
a) Methane
b) Ethane
c) Propane
d) Octane

Answer: d) Octane Explanation: Octane (C8H18) is commonly used as a fuel for vehicles in the form of gasoline.

Which of the following compounds is an example of a branched hydrocarbon?
a) Ethane
b) Ethene
c) Isobutane
d) Butyne

Answer: c) Isobutane Explanation: Isobutane (C4H10) is a branched hydrocarbon with a methyl group attached to the second carbon atom.

Which of the following hydrocarbons is commonly used as a propellant in aerosol cans?
a) Methane
b) Ethane
c) Propane
d) Butane

Answer: d) Butane Explanation: Butane is commonly used as a propellant in aerosol cans due to its high vapor pressure and low boiling point.

Which of the following compounds is an example of a saturated hydrocarbon?
a) Ethene
b) Ethyne
c) Cyclohexene
d) Cyclohexane

Answer: d) Cyclohexane Explanation: Cyclohexane is a saturated hydrocarbon with only single bonds between carbon atoms.

Which of the following reactions is an example of a dehydrogenation reaction?
a) Addition of hydrogen to an alkene
b) Oxidation of an alcohol to an aldehyde
c) Combustion of a hydrocarbon
d) Conversion of cyclohexane to benzene

Answer: d) Conversion of cyclohexane to benzene Explanation: Dehydrogenation reactions involve the removal of hydrogen atoms from a molecule, as seen in the conversion of cyclohexane to benzene.

Which of the following hydrocarbons is commonly used as a starting material for the production of ethylene?
a) Methane
b) Ethane
c) Propane
d) Butane

Answer: b) Ethane Explanation: Ethane is commonly used as a starting material for the production of ethylene, a key compound in the petrochemical industry.

Which of the following compounds is an example of a secondary alcohol?
a) Methanol
b) Ethanol
c) Propanol
d) Isopropanol

Answer: d) Isopropanol Explanation: Isopropanol (C3H8O) is a secondary alcohol with the hydroxy group attached to the second carbon atom.

Which of the following reactions is an example of a halogenation reaction?
a) Addition of water to an alkene
b) Dehydration of an alcohol
c) Addition of hydrogen to an alkyne
d) Chlorination of methane

Answer: d) Chlorination of methane Explanation: Halogenation reactions involve the addition of a halogen atom to a molecule. Chlorination of methane is an example of such a reaction.

Which of the following hydrocarbons is commonly used as a starting material for the production of polyvinyl chloride (PVC)?
a) Ethene
b) Ethyne
c) Propene
d) Vinyl chloride

Answer: d) Vinyl chloride Explanation: Vinyl chloride (C2H3Cl) is commonly used as a starting material for the production of polyvinyl chloride (PVC), a widely used thermoplastic.

We hope there JEE MCQ of Class 11 Hydrocarbons will help you to score an excellent rank in JEE Mains and Advanced. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.

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Sneha

Master's in Biology, Skilled in vocational training. Strong Analytical and creative knowledge.

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