Q. What is the main product of the reaction of 1-chloropropane with magnesium in dry ether?
A.
Propane
B.
Grignard reagent
C.
Propyl chloride
D.
Magnesium chloride
Show solution
Solution
The reaction forms a Grignard reagent, which is an organomagnesium compound.
Correct Answer:
B
— Grignard reagent
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Q. What is the main product of the reaction of benzene with bromine in the presence of FeBr3?
A.
Bromobenzene
B.
Benzyl bromide
C.
Bromobenzyl alcohol
D.
Benzene remains unchanged
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Solution
The reaction of benzene with bromine in the presence of FeBr3 leads to the formation of bromobenzene through electrophilic aromatic substitution.
Correct Answer:
A
— Bromobenzene
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Q. What is the main product of the reaction of ethene with ozone followed by zinc reduction?
A.
Acetaldehyde
B.
Ethylene glycol
C.
Acetic acid
D.
Ethane
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Solution
The ozonolysis of ethene followed by zinc reduction yields acetaldehyde.
Correct Answer:
A
— Acetaldehyde
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Q. What is the main product when 1-bromopropane is treated with aqueous KOH?
A.
Propene
B.
1-propanol
C.
2-propanol
D.
No reaction
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Solution
1-bromopropane reacts with aqueous KOH to undergo substitution, yielding 1-propanol as the main product.
Correct Answer:
B
— 1-propanol
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Q. What is the main product when 1-bromopropane reacts with magnesium in dry ether?
A.
Propylmagnesium bromide
B.
Propane
C.
Magnesium bromide
D.
Propan-1-ol
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Solution
The reaction of 1-bromopropane with magnesium in dry ether forms propylmagnesium bromide, a Grignard reagent.
Correct Answer:
A
— Propylmagnesium bromide
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Q. What is the main product when 1-butanol is oxidized?
A.
Butanal
B.
Butanoic acid
C.
Butene
D.
Butyne
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Solution
Oxidation of 1-butanol leads to the formation of butanoic acid.
Correct Answer:
B
— Butanoic acid
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Q. What is the main product when 1-butene undergoes hydroboration-oxidation?
A.
Butanol
B.
Butanal
C.
Butyric acid
D.
Butene
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Solution
The main product of hydroboration-oxidation of 1-butene is butanol.
Correct Answer:
A
— Butanol
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Q. What is the main product when 1-butyne is treated with HBr?
A.
1-bromobutane
B.
2-bromobutane
C.
1,2-dibromobutane
D.
No reaction
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Solution
When 1-butyne reacts with HBr, the main product is 2-bromobutane due to Markovnikov's rule.
Correct Answer:
B
— 2-bromobutane
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Q. What is the main product when 1-chloropropane is treated with magnesium in dry ether?
A.
Propane
B.
Propylmagnesium chloride
C.
Cyclopropane
D.
Chloromagnesium propyl
Show solution
Solution
The reaction forms propylmagnesium chloride, a Grignard reagent.
Correct Answer:
B
— Propylmagnesium chloride
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Q. What is the main product when 2-butyne is treated with excess H2 in the presence of a catalyst?
A.
1-butyne
B.
Butane
C.
2-butyne
D.
Ethyne
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Solution
The main product is butane, as 2-butyne is fully hydrogenated to form butane.
Correct Answer:
B
— Butane
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Q. What is the main product when 2-butyne undergoes hydroboration-oxidation?
A.
Butanol
B.
Butanal
C.
Butyric acid
D.
Butene
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Solution
The main product is Butanol when 2-butyne undergoes hydroboration-oxidation.
Correct Answer:
A
— Butanol
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Q. What is the main product when a carboxylic acid is reduced?
A.
Alcohol
B.
Aldehyde
C.
Ketone
D.
Alkane
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Solution
The main product of the reduction of a carboxylic acid is an alcohol.
Correct Answer:
A
— Alcohol
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Q. What is the main product when an alcohol is dehydrated?
A.
Alkene
B.
Alkane
C.
Ether
D.
Aldehyde
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Solution
Dehydration of alcohols typically yields alkenes through elimination reactions.
Correct Answer:
A
— Alkene
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Q. What is the main product when an alcohol is oxidized with potassium dichromate?
A.
Aldehyde
B.
Ketone
C.
Carboxylic acid
D.
All of the above
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Solution
Depending on the type of alcohol, oxidation with potassium dichromate can yield aldehydes, ketones, or carboxylic acids.
Correct Answer:
D
— All of the above
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Q. What is the main product when an aldehyde reacts with a Grignard reagent?
A.
Alcohol
B.
Ketone
C.
Carboxylic acid
D.
Alkane
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Solution
The reaction of an aldehyde with a Grignard reagent produces a primary alcohol after hydrolysis.
Correct Answer:
A
— Alcohol
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Q. What is the main product when an amine is treated with nitrous acid?
A.
Diazonium salt
B.
Alcohol
C.
Aldehyde
D.
Ketone
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Solution
Amines react with nitrous acid to form diazonium salts, which are important intermediates in organic synthesis.
Correct Answer:
A
— Diazonium salt
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Q. What is the main product when an amine reacts with nitrous acid?
A.
Diazonium salt
B.
Alcohol
C.
Aldehyde
D.
Amide
Show solution
Solution
The reaction of an amine with nitrous acid produces a diazonium salt.
Correct Answer:
A
— Diazonium salt
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Q. What is the main product when benzaldehyde is treated with Grignard reagent followed by hydrolysis?
A.
Benzyl alcohol
B.
Benzyl ketone
C.
Benzyl aldehyde
D.
Benzyl ether
Show solution
Solution
The reaction of benzaldehyde with Grignard reagent followed by hydrolysis yields benzyl alcohol.
Correct Answer:
A
— Benzyl alcohol
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Q. What is the main product when benzene reacts with chlorine in the presence of FeCl3?
A.
Chlorobenzene
B.
Benzyl chloride
C.
Benzene-1,2-dichloride
D.
Phenol
Show solution
Solution
The reaction of benzene with chlorine in the presence of FeCl3 leads to the formation of chlorobenzene through electrophilic aromatic substitution.
Correct Answer:
A
— Chlorobenzene
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Q. What is the main product when benzoic acid is treated with thionyl chloride?
A.
Benzoyl chloride
B.
Benzyl alcohol
C.
Benzene
D.
Benzoate salt
Show solution
Solution
Thionyl chloride (SOCl2) converts benzoic acid to benzoyl chloride, which is an acyl chloride.
Correct Answer:
A
— Benzoyl chloride
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Q. What is the main product when butanoic acid is treated with thionyl chloride?
A.
Butyl chloride
B.
Butanoate
C.
Butanoyl chloride
D.
Butanol
Show solution
Solution
The reaction of butanoic acid with thionyl chloride produces butanoyl chloride.
Correct Answer:
C
— Butanoyl chloride
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Q. What is the main product when chlorobenzene is treated with sodium hydroxide at high temperature?
A.
Phenol
B.
Benzene
C.
Chlorobenzene remains unchanged
D.
Sodium phenoxide
Show solution
Solution
Chlorobenzene reacts with sodium hydroxide at high temperature to form phenol through nucleophilic aromatic substitution.
Correct Answer:
A
— Phenol
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Q. What is the main product when ethanol is dehydrated?
A.
Ethylene
B.
Acetaldehyde
C.
Diethyl ether
D.
Ethane
Show solution
Solution
Dehydration of ethanol typically yields ethylene (ethene) as the main product.
Correct Answer:
A
— Ethylene
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Q. What is the main product when ethylamine is treated with nitrous acid?
A.
Ethyl alcohol
B.
Ethyl diazonium salt
C.
Ethylamine hydrochloride
D.
No reaction
Show solution
Solution
Ethylamine reacts with nitrous acid to form ethyl diazonium salt, which is a key intermediate in organic synthesis.
Correct Answer:
B
— Ethyl diazonium salt
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Q. What is the main product when phenol is treated with bromine water?
A.
Bromobenzene
B.
2,4,6-Tribromophenol
C.
Bromophenol
D.
Benzene
Show solution
Solution
Phenol reacts with bromine water to form 2,4,6-tribromophenol, a white precipitate.
Correct Answer:
B
— 2,4,6-Tribromophenol
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Q. What is the main product when phenol is treated with zinc dust?
A.
Benzene
B.
Cyclohexanol
C.
Toluene
D.
Phenyl ether
Show solution
Solution
Zinc dust reduces phenol to benzene.
Correct Answer:
A
— Benzene
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Q. What is the main product when phenol reacts with bromine water?
A.
Bromobenzene
B.
2,4,6-tribromophenol
C.
Bromophenol
D.
Benzene
Show solution
Solution
Phenol reacts with bromine water to form 2,4,6-tribromophenol, a white precipitate.
Correct Answer:
B
— 2,4,6-tribromophenol
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Q. What is the main product when phenol reacts with concentrated sulfuric acid?
A.
Phenyl sulfate
B.
Benzene
C.
Catechol
D.
Anisole
Show solution
Solution
The main product is phenyl sulfate, formed by the electrophilic substitution of the hydroxyl group.
Correct Answer:
A
— Phenyl sulfate
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Q. What is the main product when propan-2-one is treated with sodium bisulfite?
A.
Sodium propan-2-one sulfonate
B.
Propan-2-ol
C.
Propan-2-one bisulfite adduct
D.
None of the above
Show solution
Solution
The main product is the propan-2-one bisulfite adduct.
Correct Answer:
C
— Propan-2-one bisulfite adduct
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Q. What is the main product when propanal is treated with excess alcohol in the presence of an acid catalyst?
A.
Aldol
B.
Acetal
C.
Ketone
D.
Carboxylic acid
Show solution
Solution
When propanal is treated with excess alcohol in the presence of an acid catalyst, an acetal is formed.
Correct Answer:
B
— Acetal
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Showing 181 to 210 of 951 (32 Pages)
Organic Chemistry MCQ & Objective Questions
Organic Chemistry is a crucial subject for students preparing for school exams and competitive tests in India. Mastering this topic not only enhances your understanding of chemical compounds but also significantly boosts your exam scores. Practicing MCQs and objective questions helps you identify important concepts and refine your problem-solving skills, making it an essential part of your exam preparation.
What You Will Practise Here
Fundamental concepts of Organic Chemistry
Types of organic reactions and mechanisms
Functional groups and their properties
Isomerism and stereochemistry
Key organic compounds and their applications
Important Organic Chemistry formulas and definitions
Diagrams and structures of organic molecules
Exam Relevance
Organic Chemistry is a significant part of the syllabus for CBSE, State Boards, NEET, and JEE exams. Questions often focus on reaction mechanisms, properties of compounds, and applications of organic chemistry in real-life scenarios. Common patterns include multiple-choice questions that test conceptual understanding and application of theories, making it vital for students to practice regularly.
Common Mistakes Students Make
Confusing structural isomers with stereoisomers
Overlooking reaction conditions and their effects on outcomes
Misunderstanding the significance of functional groups
Neglecting to practice drawing reaction mechanisms
Failing to relate organic chemistry concepts to practical applications
FAQs
Question: What are some important Organic Chemistry MCQ questions to focus on?Answer: Focus on questions related to reaction mechanisms, functional groups, and isomerism, as these are frequently tested in exams.
Question: How can I improve my understanding of Organic Chemistry for exams?Answer: Regular practice of objective questions and MCQs, along with reviewing key concepts and diagrams, can greatly enhance your understanding.
Question: Are there any specific resources for Organic Chemistry practice?Answer: Utilize online platforms like SoulShift that offer a variety of practice questions and detailed explanations to strengthen your grasp of the subject.
Now is the time to take charge of your Organic Chemistry preparation! Dive into our practice MCQs and test your understanding to excel in your exams.