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 the Haloalkanes and Haloarenes. In this article, we will provide 50+ MCQ questions on the Haloalkanes and Haloarenes, 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 Haloalkanes and Haloarenes JEE Mains MCQ Questions with Answers.
Haloalkanes and Haloarenes JEE Mains MCQ
Which of the following statements regarding haloalkanes is correct? a) They are highly soluble in water. b) They undergo nucleophilic substitution reactions readily. c) They have a low boiling point compared to corresponding alcohols. d) They are non-toxic and environmentally friendly.
Answer: c) They have a low boiling point compared to corresponding alcohols.
Explanation: Haloalkanes have weaker intermolecular forces compared to alcohols due to the absence of hydrogen bonding, resulting in lower boiling points.
Which of the following reagents can be used to convert an alkyl chloride to an alkene? a) Sodium hydroxide (NaOH) b) Silver nitrate (AgNO3) c) Sodium carbonate (Na2CO3) d) Potassium permanganate (KMnO4) Answer: a) Sodium hydroxide (NaOH) Explanation: Alkyl chlorides can be converted to alkenes through the elimination reaction known as dehydrohalogenation, which can be achieved using a strong base like sodium hydroxide.
Answer: a) Sodium hydroxide (NaOH)
Explanation: Alkyl chlorides can be converted to alkenes through the elimination reaction known as dehydrohalogenation, which can be achieved using a strong base like sodium hydroxide.
The compound CH3CHClCH2CH2Cl is an example of a: a) Geminal dihalide b) Vicinal dihalide c) Monohalide d) Polyhalide
Answer: b) Vicinal dihalide
Explanation: The compound CH3CHClCH2CH2Cl has two halogen atoms attached to adjacent carbon atoms, making it a vicinal dihalide.
Which of the following reactions is an example of nucleophilic substitution? a) E2 elimination reaction b) E1 elimination reaction c) SN1 substitution reaction d) SN2 substitution reaction
Answer: d) SN2 substitution reaction
Explanation: SN2 (substitution nucleophilic bimolecular) reactions involve a one-step mechanism where the nucleophile directly displaces the leaving group, typically in a backside attack.
The major product obtained from the reaction between chlorobenzene (C6H5Cl) and sodium ethoxide (C2H5ONa) is: a) C6H5OH b) C6H5OCH2CH3 c) C6H5OCH3 d) C6H5CH2OH
Answer: b) C6H5OCH2CH3
Explanation: The reaction between chlorobenzene and sodium ethoxide is an example of nucleophilic aromatic substitution (SNAr), resulting in the substitution of the chlorine atom by the ethoxy group (-OCH2CH3).
Which of the following reactions is an example of a free radical substitution? a) Hydrolysis of alkyl halides b) Bromination of alkenes c) Esterification reaction d) Reduction of ketones
Answer: b) Bromination of alkenes
Explanation: Bromination of alkenes involves the addition of bromine to the double bond through a free radical mechanism, resulting in the substitution of a hydrogen atom by a bromine atom.
The compound CCl4 is an example of a: a) Haloalkane b) Haloarene c) Alkyl chloride d) Aryl chloride
Answer: a) Haloalkane
Explanation: CCl4 is a haloalkane because it is an alkane (containing only carbon and hydrogen) in which one or more hydrogen atoms are replaced by halogen atoms.
Which of the following reactions is an example of nucleophilic aromatic substitution? a) Friedel-Crafts alkylation b) Friedel-Crafts acylation c) Sandmeyer reaction d) Hell-Volhard-Zelinsky reaction
Answer: c) Sandmeyer reaction
Explanation: The Sandmeyer reaction involves the substitution of a diazonium salt with a nucleophile, resulting in the substitution of a hydrogen atom by the nucleophile on an aromatic ring.
The compound CH3CH2CH2Br is an example of a: a) Primary alkyl halide b) Secondary alkyl halide c) Tertiary alkyl halide d) Quaternary alkyl halide
Answer: a) Primary alkyl halide
Explanation: CH3CH2CH2Br is a primary alkyl halide because the carbon atom bonded to the halogen (bromine) is directly attached to only one other carbon atom.
The compound C6H5Br is an example of a: a) Alkyl bromide b) Aryl bromide c) Alkenyl bromide d) Alkynyl bromide
Answer: b) Aryl bromide
Explanation: C6H5Br is an aryl bromide because it is a benzene ring (aryl group) in which one of the hydrogen atoms is replaced by a bromine atom.
Which of the following reactions is an example of a nucleophilic substitution reaction? a) E2 elimination reaction b) E1 elimination reaction c) SN1 substitution reaction d) SN2 substitution reaction
Answer: d) SN2 substitution reaction
Explanation: SN2 reactions involve a one-step mechanism where the nucleophile directly displaces the leaving group, typically in a backside attack.
Which of the following compounds will undergo nucleophilic substitution most readily? a) Methyl chloride (CH3Cl) b) Ethyl chloride (C2H5Cl) c) Isopropyl chloride (CH3CHClCH3) d) tert-Butyl chloride (CH3)3CCl
Answer: a) Methyl chloride (CH3Cl)
Explanation: Methyl chloride will undergo nucleophilic substitution most readily due to its primary nature and less steric hindrance compared to the other compounds.
The reaction of alkyl halides with sodium iodide in acetone is an example of: a) Nucleophilic substitution b) Nucleophilic addition c) Elimination d) Oxidation
Answer: a) Nucleophilic substitution
Explanation: The reaction of alkyl halides with sodium iodide in acetone results in the substitution of the halogen atom by the iodide ion, indicating nucleophilic substitution.
Which of the following reagents can be used to convert an alkyl bromide to an alkene? a) Sodium hydroxide (NaOH) b) Potassium permanganate (KMnO4) c) Silver nitrate (AgNO3) d) Sodium bicarbonate (NaHCO3)
Answer: a) Sodium hydroxide (NaOH)
Explanation: Alkyl bromides can be converted to alkenes through the elimination reaction known as dehydrohalogenation, which can be achieved using a strong base like sodium hydroxide.
The major product obtained by the reaction of CH3CH2Cl with sodium ethoxide (C2H5ONa) is: a) Ethane b) Ethanol c) Ethene d) Ethyl chloride
Answer: c) Ethene
Explanation: The reaction between CH3CH2Cl and sodium ethoxide results in the elimination of a chloride ion and a proton, leading to the formation of ethene.
Which of the following reactions is an example of nucleophilic aromatic substitution? a) Friedel-Crafts alkylation b) Friedel-Crafts acylation c) Sandmeyer reaction d) Hell-Volhard-Zelinsky reaction
Answer: c) Sandmeyer reaction
Explanation: The Sandmeyer reaction involves the substitution of a diazonium salt with a nucleophile, resulting in the substitution of a hydrogen atom by the nucleophile on an aromatic ring.
The compound CH3CH2Br is an example of a: a) Primary alkyl halide b) Secondary alkyl halide c) Tertiary alkyl halide d) Quaternary alkyl halide
Answer: c) Sandmeyer reaction
Explanation: The Sandmeyer reaction involves the substitution of a diazonium salt with a nucleophile, resulting in the substitution of a hydrogen atom by the nucleophile on an aromatic ring.
Which of the following reactions is an example of a free radical substitution? a) Bromination of alkenes b) Hydrolysis of alkyl halides c) Esterification reaction d) Reduction of ketones
Answer: a) Bromination of alkenes
Explanation: Bromination of alkenes involves the addition of bromine to the double bond through a free radical mechanism, resulting in the substitution of a hydrogen atom by a bromine atom.
The compound CH3CH2CH2I is an example of a: a) Geminal dihalide b) Vicinal dihalide c) Monohalide d) Polyhalide
Answer: c) Monohalide
Explanation: CH3CH2CH2I is a monohalide because it contains only one halogen atom attached to the carbon chain.
Which of the following compounds is an example of a haloarene? a) CH3CH2Cl b) C6H5Br c) CH3Br d) CHCl3
Answer: b) C6H5Br
Explanation: C6H5Br is an example of a haloarene because it is an aromatic compound (benzene ring) in which one of the hydrogen atoms is replaced by a bromine atom.
The reaction of alkyl halides with silver nitrite (AgNO2) in ethanol is known as: a) Finkelstein reaction b) Wurtz reaction c) Victor Meyer reaction d) Gattermann reaction
Answer: a) Finkelstein reaction
Explanation: The reaction of alkyl halides with silver nitrite in ethanol results in the replacement of the halogen atom by the nitrite group (-ONO2), known as the Finkelstein reaction.
Which of the following compounds is an example of a geminal dihalide? a) CH3CH2CH2Br b) CH3CH2CH2Cl c) CH3CH2Br d) CH3CHBrCH3
Answer: d) CH3CHBrCH3
Explanation: CH3CHBrCH3 is an example of a geminal dihalide because it contains two halogen atoms (bromine) attached to the same carbon atom.
The compound C6H5Cl is an example of a: a) Haloalkane b) Haloarene c) Aryl chloride d) Alkyl chloride
Answer: c) Aryl chloride
Explanation: C6H5Cl is an aryl chloride because it is a benzene ring (aryl group) in which one of the hydrogen atoms is replaced by a chlorine atom.
Which of the following compounds undergoes the Sanger’s reaction? a) Alkyl halide b) Haloarene c) Alkyl cyanide d) Alkyl nitrite
Answer: d) Alkyl nitrite
Explanation: Sanger’s reaction involves the reaction of alkyl nitrites with aromatic primary amines to form diazo compounds, which can be used for the synthesis of azo dyes.
Which of the following reactions is an example of a nucleophilic substitution reaction in which the stereochemistry of the reactant is retained? a) SN1 reaction b) SN2 reaction c) E1 reaction d) E2 reaction
Answer: a) SN1 reaction
Explanation: SN1 reactions proceed via a two-step mechanism, and the nucleophile can attack the carbocation intermediate from either side, resulting in the retention of stereochemistry.
Which of the following reactions is used for the synthesis of alkyl fluorides? a) Finkelstein reaction b) Sandmeyer reaction c) Williamson ether synthesis d) Swarts reaction
Answer: d) Swarts reaction
Explanation: The Swarts reaction involves the substitution of a halogen atom by a fluorine atom using a mixture of a fluoride salt and a strong Lewis acid.
Which of the following reagents can be used to convert an alkyl chloride to an alkene? a) Sodium hydroxide (NaOH) b) Potassium permanganate (KMnO4) c) Silver nitrate (AgNO3) d) Sodium bicarbonate (NaHCO3)
Answer: a) Sodium hydroxide (NaOH)
Explanation: Alkyl chlorides can be converted to alkenes through the elimination reaction known as dehydrohalogenation, which can be achieved using a strong base like sodium hydroxide.
The major product obtained by the reaction of bromobenzene (C6H5Br) with sodium metal (Na) is: a) Benzene b) Biphenyl c) Phenol d) Toluene
Answer: a) Benzene
Explanation: The reaction between bromobenzene and sodium metal (Wurtz reaction) results in the formation of benzene by coupling two phenyl radicals.
Which of the following reactions is an example of a nucleophilic aromatic substitution reaction in which the nucleophile replaces the leaving group without any rearrangement of the carbon skeleton? a) Benzyne reaction b) Finkelstein reaction c) Sandmeyer reaction d) Gattermann reaction
Answer: c) Sandmeyer reaction
Explanation: The Sandmeyer reaction involves the substitution of a diazonium salt with a nucleophile, resulting in the substitution of a hydrogen atom by the nucleophile on an aromatic ring without any rearrangement.
The compound CH2Cl2 is an example of a: a) Haloalkane b) Haloarene c) Alkyl chloride d) Aryl chloride
Answer: a) Haloalkane
Explanation: CH2Cl2 is a haloalkane because it is an alkane (containing only carbon and hydrogen) in which two hydrogen atoms are replaced by chlorine atoms.
The compound C6H5CH2Cl is an example of a: a) Haloalkane b) Haloarene c) Alkyl chloride d) Aryl chloride
Answer: c) Alkyl chloride
Explanation: C6H5CH2Cl is an alkyl chloride because it is an alkane (containing only carbon and hydrogen) in which one of the hydrogen atoms is replaced by a chlorine atom.
Which of the following reactions is an example of a nucleophilic substitution reaction of a haloarene? a) Friedel-Crafts alkylation b) Friedel-Crafts acylation c) Sandmeyer reaction d) Hell-Volhard-Zelinsky reaction
Answer: c) Sandmeyer reaction
Explanation: The Sandmeyer reaction involves the substitution of a diazonium salt with a nucleophile, resulting in the substitution of a hydrogen atom by the nucleophile on an aromatic ring.
The compound CH3CH2I is an example of a: a) Primary alkyl halide b) Secondary alkyl halide c) Tertiary alkyl halide d) Quaternary alkyl halide
Answer: b) Secondary alkyl halide
Explanation: CH3CH2I is a secondary alkyl halide because the carbon atom bonded to the halogen (iodine) is directly attached to two other carbon atoms.
Which of the following reagents can be used to convert an alkyl bromide to an alcohol? a) Sodium hydroxide (NaOH) b) Potassium permanganate (KMnO4) c) Silver nitrate (AgNO3) d) Sodium bicarbonate (NaHCO3)
Answer: a) Sodium hydroxide (NaOH)
Explanation: Alkyl bromides can be converted to alcohols through the substitution reaction known as nucleophilic substitution, which can be achieved using a strong base like sodium hydroxide.
The compound C6H5Cl is an example of a: a) Haloalkane b) Haloarene c) Aryl chloride d) Alkyl chloride
Answer: c) Aryl chloride
Explanation: C6H5Cl is an aryl chloride because it is a benzene ring (aryl group) in which one of the hydrogen atoms is replaced by a chlorine atom.
Which of the following reactions is an example of a free radical substitution reaction? a) Bromination of alkenes b) Hydrolysis of alkyl halides c) Esterification reaction d) Reduction of ketones
Answer: a) Bromination of alkenes
Explanation: Bromination of alkenes involves the addition of bromine to the double bond through a free radical mechanism, resulting in the substitution of a hydrogen atom by a bromine atom.
The major product obtained by the reaction of CH3CH2Cl with sodium ethoxide (C2H5ONa) is: a) Ethane b) Ethanol c) Ethene d) Ethyl chloride
Answer: c) Ethene
Explanation: The reaction between CH3CH2Cl and sodium ethoxide results in the elimination of a chloride ion and a proton, leading to the formation of ethene.
The reaction of an alkyl halide with sodium cyanide (NaCN) in the presence of ethanol is known as: a) Finkelstein reaction b) Wurtz reaction c) Victor Meyer reaction d) Kolbe reaction
Answer: d) Kolbe reaction
Explanation: The Kolbe reaction involves the reaction of an alkyl halide with sodium cyanide in the presence of ethanol, resulting in the substitution of the halogen atom by the cyanide group (-CN).
The compound CH3CH2CH2Br is an example of a: a) Geminal dihalide b) Vicinal dihalide c) Monohalide d) Polyhalide
Answer: b) Vicinal dihalide
Explanation: CH3CH2CH2Br is a vicinal dihalide because it contains two halogen atoms (bromine) attached to adjacent carbon atoms.
Which of the following reactions is used for the synthesis of alkyl nitriles? a) Finkelstein reaction b) Sandmeyer reaction c) Gabriel synthesis d) Hofmann rearrangement
Answer: c) Gabriel synthesis
Explanation: Gabriel synthesis involves the reaction of alkyl halides with potassium phthalimide, followed by hydrolysis, to form alkyl nitriles.
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