Q. Which of the following is the correct IUPAC name for C5H10?
A.
Pentane
B.
Cyclopentane
C.
1-Pentene
D.
2-Pentene
Show solution
Solution
C5H10 corresponds to pentane, which is a straight-chain alkane with 5 carbon atoms.
Correct Answer:
A
— Pentane
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Q. Which of the following is the correct IUPAC name for C6H12?
A.
Hexane
B.
Cyclohexane
C.
2-Hexene
D.
1-Hexyne
Show solution
Solution
C6H12 is a straight-chain alkane with 6 carbons, which is named Hexane.
Correct Answer:
A
— Hexane
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Q. Which of the following is the correct IUPAC name for C6H5-CH2-CH2-COOH?
A.
Phenylbutanoic acid
B.
Butylbenzoic acid
C.
Benzoic acid
D.
Phenylpropanoic acid
Show solution
Solution
The compound has a phenyl group attached to a butanoic acid structure, making it Phenylbutanoic acid.
Correct Answer:
A
— Phenylbutanoic acid
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Q. Which of the following is the correct IUPAC name for C6H5-CH2-CH3?
A.
Ethylbenzene
B.
Phenylpropane
C.
Benzyl ethane
D.
Benzene ethyl
Show solution
Solution
The compound has a phenyl group attached to an ethyl group, making it Ethylbenzene.
Correct Answer:
A
— Ethylbenzene
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Q. Which of the following is the correct IUPAC name for CH3-CH2-CH(CH3)-CH2-CH3?
A.
2-Pentene
B.
3-Pentene
C.
2-Methylbutane
D.
3-Methylbutane
Show solution
Solution
The longest carbon chain has 5 carbons, and there is a methyl group on the second carbon, making it 2-Methylbutane.
Correct Answer:
C
— 2-Methylbutane
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Q. Which of the following is the correct IUPAC name for CH3-CH2-CH(CH3)-OH?
A.
2-Methylpropan-1-ol
B.
3-Methylbutan-1-ol
C.
2-Methylbutan-1-ol
D.
3-Methylpropan-1-ol
Show solution
Solution
The longest chain has four carbons, and the hydroxyl group is on the first carbon, with a methyl group on the second carbon, making it 2-Methylbutan-1-ol.
Correct Answer:
C
— 2-Methylbutan-1-ol
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Q. Which of the following is the correct IUPAC name for CH3CH2CH2OH?
A.
Propan-1-ol
B.
Butan-1-ol
C.
Butan-2-ol
D.
Pentan-1-ol
Show solution
Solution
The correct IUPAC name for CH3CH2CH2OH is Butan-1-ol, as it has four carbon atoms with the hydroxyl group on the first carbon.
Correct Answer:
B
— Butan-1-ol
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Q. Which of the following is the correct IUPAC name for CH3CHO?
A.
Ethanal
B.
Propanal
C.
Butanal
D.
Methanal
Show solution
Solution
The correct IUPAC name for CH3CHO is Ethanal.
Correct Answer:
A
— Ethanal
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Q. Which of the following is the correct IUPAC name for CH3COOH?
A.
Methanoic acid
B.
Ethanoic acid
C.
Propanoic acid
D.
Butanoic acid
Show solution
Solution
The compound CH3COOH is known as Ethanoic acid, which is the IUPAC name for acetic acid.
Correct Answer:
B
— Ethanoic acid
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Q. Which of the following is the correct IUPAC name for the compound C2H5-CHO?
A.
Ethanal
B.
Propanoic acid
C.
Acetaldehyde
D.
Ethyl aldehyde
Show solution
Solution
The compound is an aldehyde with two carbons, hence the IUPAC name is Ethanal.
Correct Answer:
A
— Ethanal
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Q. Which of the following is the correct IUPAC name for the compound C3H6O?
A.
Propylene oxide
B.
Acetone
C.
Propanal
D.
Cyclopropanol
Show solution
Solution
C3H6O can be identified as Propanal, which is an aldehyde with three carbons.
Correct Answer:
C
— Propanal
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Q. Which of the following is the correct IUPAC name for the compound CH3-CH(CH3)-C(CH3)2-COOH?
A.
2-Hydroxy-3-methylpentanoic acid
B.
3-Methyl-2-pentanoic acid
C.
2-Methyl-3-pentanoic acid
D.
3-Hydroxy-2-methylpentanoic acid
Show solution
Solution
The longest chain has 5 carbons, with a methyl group on the second carbon and a carboxylic acid on the first, making it 3-Methyl-2-pentanoic acid.
Correct Answer:
B
— 3-Methyl-2-pentanoic acid
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Q. Which of the following is the correct IUPAC name for the compound CH3-CH2-CH(CH3)-C≡C-H?
A.
3-Methyl-1-pentyne
B.
2-Methyl-1-pentyne
C.
1-Methyl-2-pentyne
D.
1-Methyl-3-pentyne
Show solution
Solution
The compound has a triple bond and the longest chain has five carbons, making it 3-Methyl-1-pentyne.
Correct Answer:
A
— 3-Methyl-1-pentyne
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Q. Which of the following is the correct IUPAC name for the compound CH3-CH2-CH(CH3)-OH?
A.
2-Propanol
B.
1-Butanol
C.
2-Butanol
D.
3-Butanol
Show solution
Solution
The compound has a hydroxyl group on the second carbon of a four-carbon chain, making it 2-Butanol.
Correct Answer:
C
— 2-Butanol
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Q. Which of the following is the correct IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?
A.
Pentanoic acid
B.
Butanoic acid
C.
Hexanoic acid
D.
Heptanoic acid
Show solution
Solution
The compound is a carboxylic acid with 5 carbons, named Pentanoic acid.
Correct Answer:
A
— Pentanoic acid
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Q. Which of the following is the correct IUPAC name for the compound CH3-CH2-CH2-CHO?
A.
Butanal
B.
Propionaldehyde
C.
Pentanal
D.
Ethanal
Show solution
Solution
The compound has a four-carbon chain with an aldehyde functional group, so it is named Butanal.
Correct Answer:
A
— Butanal
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Q. Which of the following is the correct IUPAC name for the compound with the formula C6H5-CH2-CHO?
A.
Benzaldehyde
B.
Benzylaldehyde
C.
Phenylacetaldehyde
D.
Phenylaldehyde
Show solution
Solution
The compound has a benzyl group attached to an aldehyde, making it Benzylaldehyde.
Correct Answer:
B
— Benzylaldehyde
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Q. Which of the following is the correct IUPAC name for the compound with the formula C3H7-COOH?
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Isobutyric acid
Show solution
Solution
The compound has three carbons in the longest chain and a carboxylic acid functional group, making it Propanoic acid.
Correct Answer:
A
— Propanoic acid
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Q. Which of the following is the correct IUPAC name for the compound with the formula C5H10?
A.
Pentene
B.
Cyclopentane
C.
Pentane
D.
2-Pentene
Show solution
Solution
The compound is a straight-chain alkane with five carbons, hence the name is Pentane.
Correct Answer:
C
— Pentane
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Q. Which of the following is the correct IUPAC name for the compound with the formula C6H5-CH2-CH2-COOH?
A.
Phenylbutanoic acid
B.
Butylphenyl acid
C.
Benzoic acid
D.
Phenylpropanoic acid
Show solution
Solution
The compound has a phenyl group attached to a butanoic acid, making it Phenylbutanoic acid.
Correct Answer:
A
— Phenylbutanoic acid
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Q. Which of the following is the correct IUPAC name for the compound with the formula C2H5-CHO?
A.
Ethanal
B.
Propionaldehyde
C.
Acetaldehyde
D.
Butanal
Show solution
Solution
The compound is an aldehyde with two carbons, and its IUPAC name is Acetaldehyde.
Correct Answer:
C
— Acetaldehyde
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Q. Which of the following is the correct IUPAC name for the compound with the formula C4H10?
A.
Butane
B.
Isobutane
C.
Butene
D.
Cyclobutane
Show solution
Solution
C4H10 is butane, which is a straight-chain alkane with 4 carbon atoms.
Correct Answer:
A
— Butane
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Q. Which of the following is the correct IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH2-CHO?
A.
Hexanal
B.
Pentanal
C.
Heptanal
D.
Octanal
Show solution
Solution
The compound has a total of 6 carbons and an aldehyde functional group, making it Hexanal.
Correct Answer:
A
— Hexanal
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Q. Which of the following is the correct IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-COOH?
A.
3-Methylbutanoic acid
B.
2-Methylbutanoic acid
C.
Butanoic acid
D.
Pentanoic acid
Show solution
Solution
The longest chain has four carbons with a methyl group on the second carbon, hence it is named 2-Methylbutanoic acid.
Correct Answer:
B
— 2-Methylbutanoic acid
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Q. Which of the following is the correct IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CHO?
A.
Butanal
B.
Pentanal
C.
Hexanal
D.
Heptanal
Show solution
Solution
The compound is an aldehyde with five carbons, hence the IUPAC name is Pentanal.
Correct Answer:
B
— Pentanal
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Q. Which of the following is the correct IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-OH?
A.
2-Methylpropan-1-ol
B.
2-Methylbutan-1-ol
C.
3-Methylbutan-1-ol
D.
1-Methylbutan-2-ol
Show solution
Solution
The compound has a hydroxyl group and the longest chain has four carbons, making it 3-Methylbutan-1-ol.
Correct Answer:
C
— 3-Methylbutan-1-ol
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Q. Which of the following is the correct order of acidity for the following compounds: phenol, ethanol, and water?
A.
Phenol > Water > Ethanol
B.
Water > Phenol > Ethanol
C.
Ethanol > Water > Phenol
D.
Water > Ethanol > Phenol
Show solution
Solution
Phenol is more acidic than water, which is more acidic than ethanol due to the stability of the phenoxide ion.
Correct Answer:
A
— Phenol > Water > Ethanol
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Q. Which of the following is the correct order of acidity for the given compounds?
A.
Phenol > Ethanol > Water
B.
Ethanol > Water > Phenol
C.
Water > Phenol > Ethanol
D.
Phenol > Water > Ethanol
Show solution
Solution
Phenol is more acidic than ethanol and water due to the resonance stabilization of the phenoxide ion.
Correct Answer:
A
— Phenol > Ethanol > Water
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Q. Which of the following is the correct order of basicity for the given amines?
A.
RNH2 > R2NH > R3N
B.
R3N > R2NH > RNH2
C.
R2NH > R3N > RNH2
D.
RNH2 > R3N > R2NH
Show solution
Solution
The basicity of amines decreases with increasing alkyl substitution due to steric hindrance and electron-donating effects.
Correct Answer:
A
— RNH2 > R2NH > R3N
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Q. Which of the following is the correct reaction for the hydrogenation of 1-butyne?
A.
C4H6 + H2 → C4H10
B.
C4H6 + H2 → C4H8
C.
C4H6 + H2 → C4H12
D.
C4H6 + H2 → C4H4
Show solution
Solution
1-butyne (C4H6) reacts with hydrogen (H2) to form butene (C4H8) under catalytic conditions.
Correct Answer:
B
— C4H6 + H2 → C4H8
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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!
