Major Competitive Exams MCQ & Objective Questions
Major Competitive Exams play a crucial role in shaping the academic and professional futures of students in India. These exams not only assess knowledge but also test problem-solving skills and time management. Practicing MCQs and objective questions is essential for scoring better, as they help in familiarizing students with the exam format and identifying important questions that frequently appear in tests.
What You Will Practise Here
Key concepts and theories related to major subjects
Important formulas and their applications
Definitions of critical terms and terminologies
Diagrams and illustrations to enhance understanding
Practice questions that mirror actual exam patterns
Strategies for solving objective questions efficiently
Time management techniques for competitive exams
Exam Relevance
The topics covered under Major Competitive Exams are integral to various examinations such as CBSE, State Boards, NEET, and JEE. Students can expect to encounter a mix of conceptual and application-based questions that require a solid understanding of the subjects. Common question patterns include multiple-choice questions that test both knowledge and analytical skills, making it essential to be well-prepared with practice MCQs.
Common Mistakes Students Make
Rushing through questions without reading them carefully
Overlooking the negative marking scheme in MCQs
Confusing similar concepts or terms
Neglecting to review previous years’ question papers
Failing to manage time effectively during the exam
FAQs
Question: How can I improve my performance in Major Competitive Exams?Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Question: What types of questions should I focus on for these exams?Answer: Concentrate on important Major Competitive Exams questions that frequently appear in past papers and mock tests.
Question: Are there specific strategies for tackling objective questions?Answer: Yes, practicing under timed conditions and reviewing mistakes can help develop effective strategies.
Start your journey towards success by solving practice MCQs today! Test your understanding and build confidence for your upcoming exams. Remember, consistent practice is the key to mastering Major Competitive Exams!
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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Q. What is the IUPAC name of CH3CH2CH2OH?
A.
Propan-1-ol
B.
Butan-1-ol
C.
Pentanol
D.
Butanol
Show solution
Solution
The compound CH3CH2CH2OH is named butan-1-ol as it has four carbon atoms and the hydroxyl group is on the first carbon.
Correct Answer:
B
— Butan-1-ol
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Q. What is the IUPAC name of CH3CH2Cl?
A.
Chloroethane
B.
Ethyl chloride
C.
Ethane chloride
D.
Chloromethane
Show solution
Solution
The IUPAC name of CH3CH2Cl is Chloroethane, as it is a two-carbon alkane with a chlorine substituent.
Correct Answer:
A
— Chloroethane
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Q. What is the IUPAC name of CH3CH2OCH2CH3?
A.
Ethyl methyl ether
B.
Dimethyl ether
C.
Diethyl ether
D.
Ethyl ether
Show solution
Solution
The compound CH3CH2OCH2CH3 is named diethyl ether, as it consists of two ethyl groups bonded to an oxygen atom.
Correct Answer:
C
— Diethyl ether
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Q. What is the IUPAC name of CH3CH2OH? (2021) 2021
A.
Ethanol
B.
Methanol
C.
Propanol
D.
Butanol
Show solution
Solution
The compound CH3CH2OH is an alcohol with two carbon atoms, which is named Ethanol.
Correct Answer:
A
— Ethanol
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Q. What is the IUPAC name of CH3CHO?
A.
Ethanal
B.
Propanal
C.
Acetaldehyde
D.
Butanal
Show solution
Solution
The IUPAC name of CH3CHO is ethanal, which is also known as acetaldehyde.
Correct Answer:
A
— Ethanal
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Q. What is the IUPAC name of CH3CHO? (2023) 2023
A.
Acetaldehyde
B.
Ethanal
C.
Ethyl aldehyde
D.
Methyl ketone
Show solution
Solution
The IUPAC name of CH3CHO is ethanal, which is the simplest aldehyde.
Correct Answer:
B
— Ethanal
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Q. What is the IUPAC name of CH3COCH2CH3?
A.
Butan-2-one
B.
Butanal
C.
Propan-2-one
D.
Pentanal
Show solution
Solution
The IUPAC name of CH3COCH2CH3 is Butan-2-one, as it has a ketone functional group at the second carbon.
Correct Answer:
A
— Butan-2-one
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Q. What is the IUPAC name of CH3COCH2CHO?
A.
3-oxobutanal
B.
4-oxobutanal
C.
2-oxobutanal
D.
2-butanone
Show solution
Solution
The IUPAC name of CH3COCH2CHO is 3-oxobutanal.
Correct Answer:
A
— 3-oxobutanal
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Q. What is the IUPAC name of CH3COCH3?
A.
Propanal
B.
Butan-2-one
C.
Acetone
D.
Ethyl methyl ketone
Show solution
Solution
CH3COCH3 is known as acetone, which is the simplest ketone.
Correct Answer:
C
— Acetone
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Q. What is the IUPAC name of CH3COOH?
A.
Methanoic acid
B.
Ethanoic acid
C.
Propanoic acid
D.
Butanoic acid
Show solution
Solution
CH3COOH is known as Ethanoic acid in IUPAC nomenclature.
Correct Answer:
B
— Ethanoic acid
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