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
Show solution
Solution
The reaction of 1-bromopropane with magnesium in dry ether forms propylmagnesium bromide, a Grignard reagent.
Correct Answer:
A
— Propylmagnesium bromide
Learn More →
Q. What is the main product when 1-butanol is oxidized?
A.
Butanal
B.
Butanoic acid
C.
Butene
D.
Butyne
Show solution
Solution
Oxidation of 1-butanol leads to the formation of butanoic acid.
Correct Answer:
B
— Butanoic acid
Learn More →
Q. What is the main product when 1-butene undergoes hydroboration-oxidation?
A.
Butanol
B.
Butanal
C.
Butyric acid
D.
Butene
Show solution
Solution
The main product of hydroboration-oxidation of 1-butene is butanol.
Correct Answer:
A
— Butanol
Learn More →
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
Show solution
Solution
When 1-butyne reacts with HBr, the main product is 2-bromobutane due to Markovnikov's rule.
Correct Answer:
B
— 2-bromobutane
Learn More →
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
Learn More →
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
Show solution
Solution
The main product is butane, as 2-butyne is fully hydrogenated to form butane.
Correct Answer:
B
— Butane
Learn More →
Q. What is the main product when 2-butyne undergoes hydroboration-oxidation?
A.
Butanol
B.
Butanal
C.
Butyric acid
D.
Butene
Show solution
Solution
The main product is Butanol when 2-butyne undergoes hydroboration-oxidation.
Correct Answer:
A
— Butanol
Learn More →
Q. What is the main product when a carboxylic acid is reduced?
A.
Alcohol
B.
Aldehyde
C.
Ketone
D.
Alkane
Show solution
Solution
The main product of the reduction of a carboxylic acid is an alcohol.
Correct Answer:
A
— Alcohol
Learn More →
Q. What is the main product when an alcohol is dehydrated?
A.
Alkene
B.
Alkane
C.
Ether
D.
Aldehyde
Show solution
Solution
Dehydration of alcohols typically yields alkenes through elimination reactions.
Correct Answer:
A
— Alkene
Learn More →
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
Show solution
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
Learn More →
Q. What is the main product when an aldehyde reacts with a Grignard reagent?
A.
Alcohol
B.
Ketone
C.
Carboxylic acid
D.
Alkane
Show solution
Solution
The reaction of an aldehyde with a Grignard reagent produces a primary alcohol after hydrolysis.
Correct Answer:
A
— Alcohol
Learn More →
Q. What is the main product when an amine is treated with nitrous acid?
A.
Diazonium salt
B.
Alcohol
C.
Aldehyde
D.
Ketone
Show solution
Solution
Amines react with nitrous acid to form diazonium salts, which are important intermediates in organic synthesis.
Correct Answer:
A
— Diazonium salt
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
Q. What is the main product when hydrogen reacts with nitrogen at high temperatures?
A.
Ammonia
B.
Hydrazine
C.
Nitric oxide
D.
Nitrogen gas
Show solution
Solution
The main product of the reaction between hydrogen and nitrogen at high temperatures is ammonia (NH3).
Correct Answer:
A
— Ammonia
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
Q. What is the main product when propanal is treated with excess Grignard reagent followed by hydrolysis?
A.
Propan-1-ol
B.
Propan-2-ol
C.
Propan-1,2-diol
D.
Butan-2-ol
Show solution
Solution
The reaction of propanal with excess Grignard reagent followed by hydrolysis yields propan-2-ol.
Correct Answer:
B
— Propan-2-ol
Learn More →
Q. What is the main product when propanal is treated with excess hydrogen in the presence of a catalyst?
A.
Propan-1-ol
B.
Propan-2-ol
C.
Propanoic acid
D.
Propane
Show solution
Solution
Propanal is reduced to propan-1-ol when treated with excess hydrogen in the presence of a catalyst.
Correct Answer:
A
— Propan-1-ol
Learn More →
Q. What is the main product when propanoic acid is treated with thionyl chloride?
A.
Propyl chloride
B.
Propanoic anhydride
C.
Propionyl chloride
D.
Propylene
Show solution
Solution
The reaction of propanoic acid with thionyl chloride produces propionyl chloride.
Correct Answer:
C
— Propionyl chloride
Learn More →
Showing 931 to 960 of 2802 (94 Pages)
Chemistry Syllabus (JEE Main) MCQ & Objective Questions
The Chemistry Syllabus for JEE Main is crucial for students aiming to excel in their exams. Understanding this syllabus not only helps in grasping fundamental concepts but also enhances performance in objective questions and MCQs. Regular practice with these types of questions is essential for scoring better and mastering important topics.
What You Will Practise Here
Basic Concepts of Chemistry
Atomic Structure and Chemical Bonding
States of Matter: Gases and Liquids
Thermodynamics and Thermochemistry
Equilibrium: Chemical and Ionic
Redox Reactions and Electrochemistry
Hydrocarbons and Environmental Chemistry
Exam Relevance
The Chemistry syllabus is a significant part of CBSE, State Boards, NEET, and JEE exams. Questions from this syllabus often appear in various formats, including multiple-choice questions, assertion-reason type questions, and numerical problems. Familiarity with the common question patterns can greatly enhance your exam preparation and confidence.
Common Mistakes Students Make
Misunderstanding the periodic trends and their implications.
Confusing different types of chemical bonds and their properties.
Neglecting to balance redox reactions properly.
Overlooking the significance of units in thermodynamic calculations.
Failing to apply concepts of equilibrium in problem-solving.
FAQs
Question: What are the key topics I should focus on in the Chemistry syllabus for JEE Main?Answer: Focus on atomic structure, chemical bonding, thermodynamics, and equilibrium as they are frequently tested.
Question: How can I improve my performance in Chemistry MCQs?Answer: Regular practice with past papers and understanding concepts deeply will help you tackle MCQs effectively.
Start your journey towards mastering the Chemistry Syllabus (JEE Main) by solving practice MCQs today. Test your understanding and build confidence for your exams!