JEE Main MCQ & Objective Questions
The JEE Main exam is a crucial step for students aspiring to enter prestigious engineering colleges in India. It tests not only knowledge but also the ability to apply concepts effectively. Practicing MCQs and objective questions is essential for scoring better, as it helps in familiarizing students with the exam pattern and enhances their problem-solving skills. Engaging with practice questions allows students to identify important questions and strengthen their exam preparation.
What You Will Practise Here
Fundamental concepts of Physics, Chemistry, and Mathematics
Key formulas and their applications in problem-solving
Important definitions and theories relevant to JEE Main
Diagrams and graphical representations for better understanding
Numerical problems and their step-by-step solutions
Previous years' JEE Main questions for real exam experience
Time management strategies while solving MCQs
Exam Relevance
The topics covered in JEE Main are not only significant for the JEE exam but also appear in various CBSE and State Board examinations. Many concepts are shared with the NEET syllabus, making them relevant across multiple competitive exams. Common question patterns include conceptual applications, numerical problems, and theoretical questions that assess a student's understanding of core subjects.
Common Mistakes Students Make
Misinterpreting the question stem, leading to incorrect answers
Neglecting units in numerical problems, which can change the outcome
Overlooking negative marking and not managing time effectively
Relying too heavily on rote memorization instead of understanding concepts
Failing to review and analyze mistakes from practice tests
FAQs
Question: How can I improve my speed in solving JEE Main MCQ questions?Answer: Regular practice with timed quizzes and focusing on shortcuts can significantly enhance your speed.
Question: Are the JEE Main objective questions similar to previous years' papers?Answer: Yes, many questions are based on previous years' patterns, so practicing them can be beneficial.
Question: What is the best way to approach JEE Main practice questions?Answer: Start with understanding the concepts, then attempt practice questions, and finally review your answers to learn from mistakes.
Now is the time to take charge of your preparation! Dive into solving JEE Main MCQs and practice questions to test your understanding and boost your confidence for the exam.
Q. What is the IUPAC name for the compound with the formula C6H12?
A.
Hexane
B.
Cyclohexane
C.
1-Hexene
D.
2-Hexene
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. What is the IUPAC name for the compound with the formula C6H5-CH=CH2?
A.
Benzyl ethylene
B.
Styrene
C.
Phenylpropene
D.
Vinylbenzene
Show solution
Solution
The compound is an alkene with a phenyl group, hence the IUPAC name is Styrene.
Correct Answer:
B
— Styrene
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Q. What is the IUPAC name for the compound with the formula CH3-CH(CH3)-C(=O)-OH?
A.
3-Hydroxybutanoic acid
B.
2-Hydroxybutanoic acid
C.
3-Hydroxypropanoic acid
D.
2-Hydroxypropanoic acid
Show solution
Solution
The compound has a hydroxyl group on the second carbon of a four-carbon chain with a carboxylic acid, making it 2-Hydroxybutanoic acid.
Correct Answer:
B
— 2-Hydroxybutanoic acid
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Q. What is the IUPAC name for the compound with the formula CH3-CH(CH3)-CH2-CHO?
A.
3-Methylbutanal
B.
2-Methylbutanal
C.
4-Methylbutanal
D.
Pentanal
Show solution
Solution
The longest chain has 4 carbons with an aldehyde functional group, and a methyl group on the second carbon, hence 2-Methylbutanal.
Correct Answer:
B
— 2-Methylbutanal
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Q. What is the IUPAC name for the compound with the formula CH3-CH2-CH(CH3)-OH?
A.
2-Propanol
B.
2-Butanol
C.
3-Butanol
D.
1-Butanol
Show solution
Solution
The longest chain has 4 carbons with an alcohol group on the second carbon, hence it is 2-Butanol.
Correct Answer:
B
— 2-Butanol
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Q. What is the IUPAC name for the compound with the formula CH3-CH2-CH2-CH2-COOH?
A.
Pentanoic acid
B.
Butanoic acid
C.
Hexanoic acid
D.
Heptanoic acid
Show solution
Solution
The compound has a carboxylic acid functional group and five carbons, making it Pentanoic acid.
Correct Answer:
A
— Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula CH3-CO-CH2-CH3?
A.
Butan-2-one
B.
Butan-1-one
C.
Propan-2-one
D.
Pentanal
Show solution
Solution
The compound is a ketone with 4 carbons, and the carbonyl group is on the second carbon, making it Butan-2-one.
Correct Answer:
A
— Butan-2-one
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-CH2-CH3?
A.
2,3-Dimethylpentane
B.
3,3-Dimethylpentane
C.
2,2-Dimethylpentane
D.
3-Methylpentane
Show solution
Solution
The longest chain has 5 carbons, with two methyl groups on the third carbon, so the name is 3,3-Dimethylpentane.
Correct Answer:
B
— 3,3-Dimethylpentane
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-COOH?
A.
2-Methyl-3-pentanoic acid
B.
3-Methyl-2-pentanoic acid
C.
2,3-Dimethylbutanoic acid
D.
3,3-Dimethylbutanoic acid
Show solution
Solution
The compound has a carboxylic acid and two methyl groups on the third carbon, making it 3,3-Dimethylbutanoic acid.
Correct Answer:
D
— 3,3-Dimethylbutanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-CH2-CHO?
A.
2-Methylbutanal
B.
3-Methylbutanal
C.
2-Butanal
D.
3-Butanal
Show solution
Solution
The longest chain has four carbons, and the aldehyde is at the end, making it 2-Methylbutanal.
Correct Answer:
A
— 2-Methylbutanal
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-CH2-COOH?
A.
2-Methylbutanoic acid
B.
3-Methylbutanoic acid
C.
2-Butenoic acid
D.
3-Butenoic acid
Show solution
Solution
The longest chain has four carbons, and the methyl group is on the second carbon, hence it is 2-Methylbutanoic acid.
Correct Answer:
A
— 2-Methylbutanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-C(=O)-OH?
A.
3-Hydroxybutanoic acid
B.
2-Hydroxybutanoic acid
C.
3-Methylbutanoic acid
D.
2-Methylbutanoic acid
Show solution
Solution
The compound has a hydroxyl group on the second carbon of a four-carbon chain, making it 2-Hydroxybutanoic acid.
Correct Answer:
B
— 2-Hydroxybutanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-OH?
A.
2-Propanol
B.
1-Butanol
C.
2-Butanol
D.
3-Butanol
Show solution
Solution
The longest chain has four carbons, and the hydroxyl group is on the second carbon, making it 2-Butanol.
Correct Answer:
C
— 2-Butanol
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH2-COOH?
A.
Hexanoic acid
B.
Pentanoic acid
C.
Heptanoic acid
D.
Octanoic acid
Show solution
Solution
The longest chain has six carbons, and the functional group is a carboxylic acid, hence the name is Hexanoic acid.
Correct Answer:
A
— Hexanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH=CH2?
A.
1-Hexene
B.
2-Hexene
C.
3-Hexene
D.
Cyclohexene
Show solution
Solution
The compound is an alkene with a double bond at the first carbon, named 1-Hexene.
Correct Answer:
A
— 1-Hexene
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Q. What is the 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 longest chain has five carbons and ends with an aldehyde, hence it is Pentanal.
Correct Answer:
B
— Pentanal
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-COOH?
A.
Pentanoic acid
B.
Hexanoic acid
C.
Butanoic acid
D.
Heptanoic acid
Show solution
Solution
The compound has a carboxylic acid functional group and a five-carbon chain, making it Pentanoic acid.
Correct Answer:
A
— Pentanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-COOH?
A.
Butanoic acid
B.
Propanoic acid
C.
Pentanoic acid
D.
Hexanoic acid
Show solution
Solution
The compound has a carboxylic acid functional group and a four-carbon chain, making it Butanoic acid.
Correct Answer:
A
— Butanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH=CH2?
A.
1-Butene
B.
2-Butene
C.
Butyne
D.
Butane
Show solution
Solution
The compound has a double bond between the first and second carbons, making it 1-Butene.
Correct Answer:
A
— 1-Butene
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?
A.
Butan-2-one
B.
Propan-2-one
C.
Butan-1-one
D.
Pentanal
Show solution
Solution
The compound is a ketone with four carbons and the carbonyl group on the second carbon, hence it is Butan-2-one.
Correct Answer:
A
— Butan-2-one
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-COOH?
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Methanoic acid
Show solution
Solution
The compound is a carboxylic acid with 3 carbons, named Propanoic acid.
Correct Answer:
A
— Propanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CO-CH2-COOH?
A.
3-Oxobutanoic acid
B.
2-Oxobutanoic acid
C.
Butanoic acid
D.
Acetic acid
Show solution
Solution
The compound has a ketone and a carboxylic acid, making it 3-Oxobutanoic acid.
Correct Answer:
A
— 3-Oxobutanoic acid
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Q. What is the IUPAC name of CH2=CH-CH2-CH3?
A.
1-Butene
B.
2-Butene
C.
Propene
D.
Butyne
Show solution
Solution
The correct IUPAC name for CH2=CH-CH2-CH3 is 1-Butene, as the double bond is at the first carbon.
Correct Answer:
A
— 1-Butene
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Q. What is the IUPAC name of CH3-CH2-CH(CH3)-CH2-CH3?
A.
2-Pentyl
B.
3-Pentyl
C.
2-Methylpentane
D.
3-Methylpentane
Show solution
Solution
The longest carbon chain has 5 carbons, and there is a methyl group on the second carbon, making it 2-Methylpentane.
Correct Answer:
C
— 2-Methylpentane
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Q. What is the IUPAC name of CH3-CH2-CH2-CH3?
A.
Butane
B.
Propane
C.
Pentane
D.
Hexane
Show solution
Solution
The longest carbon chain has 4 carbons, so the IUPAC name is butane.
Correct Answer:
A
— Butane
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Q. What is the IUPAC name of CH3-CH2-CH2-CHO?
A.
Butanal
B.
Propionaldehyde
C.
Pentanal
D.
Hexanal
Show solution
Solution
The compound is a four-carbon aldehyde, hence its IUPAC name is Butanal.
Correct Answer:
A
— Butanal
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Q. What is the IUPAC name of CH3-CH2-CH2-COOH?
A.
Butanoic acid
B.
Propanoic acid
C.
Pentanoic acid
D.
Hexanoic acid
Show solution
Solution
The longest carbon chain contains four carbons, and the functional group is a carboxylic acid, hence the name is Butanoic acid.
Correct Answer:
A
— Butanoic acid
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Q. What is the IUPAC name of CH3-CH2-CHO?
A.
Ethanal
B.
Propanal
C.
Butanal
D.
Methanal
Show solution
Solution
The compound CH3-CH2-CHO is an aldehyde and is named ethanal.
Correct Answer:
A
— Ethanal
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Q. What is the IUPAC name of CH3-CH2-COOH?
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Methanoic acid
Show solution
Solution
The compound CH3-CH2-COOH has three carbon atoms and is a carboxylic acid, thus it is named propanoic acid.
Correct Answer:
A
— Propanoic acid
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Q. What is the IUPAC name of CH3CH2CH(OH)CH3?
A.
2-Butanol
B.
1-Butanol
C.
Propan-2-ol
D.
Butan-2-ol
Show solution
Solution
The compound is Butan-2-ol, as the hydroxyl group is on the second carbon.
Correct Answer:
D
— Butan-2-ol
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