Q. What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?
A.
Pentanoic acid
B.
Butanoic acid
C.
Hexanoic acid
D.
Heptanoic acid
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Solution
The longest carbon chain contains five carbons, and the functional group is a carboxylic acid, hence the name is Pentanoic acid.
Correct Answer:
A
— Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula C2H5-CHO?
A.
Ethanal
B.
Propanoic acid
C.
Acetaldehyde
D.
Butanal
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Solution
The compound is an aldehyde with two carbons, which is named Acetaldehyde or Ethanal.
Correct Answer:
C
— Acetaldehyde
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Q. What is the IUPAC name for the compound with the formula C2H5-CO-CH3?
A.
2-Pentanone
B.
3-Pentanone
C.
Butan-2-one
D.
Butan-3-one
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Solution
The compound has a ketone functional group with 4 carbons, making it Butan-2-one.
Correct Answer:
C
— Butan-2-one
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Q. What is the IUPAC name for the compound with the formula C2H5OH?
A.
Ethanol
B.
Ethylene glycol
C.
Ethyl alcohol
D.
Dimethyl ether
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Solution
C2H5OH is an alcohol with 2 carbons, named Ethanol.
Correct Answer:
A
— Ethanol
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Q. What is the IUPAC name for the compound with the formula C3H6?
A.
Propene
B.
Cyclopropane
C.
Propyne
D.
Propane
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Solution
C3H6 is an alkene with three carbons, which is named Propene.
Correct Answer:
A
— Propene
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Q. What is the IUPAC name for the compound with the formula C3H7-CO-CH3?
A.
Butan-2-one
B.
Propan-2-one
C.
Pentanal
D.
Butanal
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 formula C3H7-COOH?
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Isobutyric acid
Show solution
Solution
The compound is isobutyric acid, which is a branched-chain carboxylic acid with three carbons.
Correct Answer:
D
— Isobutyric acid
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Q. What is the IUPAC name for the compound with the formula C3H7OH?
A.
Propan-1-ol
B.
Propan-2-ol
C.
Butan-1-ol
D.
Methanol
Show solution
Solution
The compound is an alcohol with three carbons and the hydroxyl group on the second carbon, hence the name is Propan-2-ol.
Correct Answer:
B
— Propan-2-ol
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Q. What is the IUPAC name for the compound with the formula C4H10O?
A.
Butanol
B.
Butanal
C.
Ethyl methyl ether
D.
Tert-butanol
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Solution
C4H10O can be identified as an alcohol with 4 carbons, which is named Butanol.
Correct Answer:
A
— Butanol
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Q. What is the IUPAC name for the compound with the formula C4H8O?
A.
Butanal
B.
Butan-2-ol
C.
Butan-1-ol
D.
Cyclobutanol
Show solution
Solution
C4H8O can correspond to butan-2-ol, which is a secondary alcohol.
Correct Answer:
B
— Butan-2-ol
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Q. What is the IUPAC name for the compound with the formula C4H9-CHO?
A.
Butanal
B.
Pentanal
C.
Propionaldehyde
D.
Isobutyraldehyde
Show solution
Solution
The compound has four carbons and an aldehyde functional group, making it Butanal.
Correct Answer:
A
— Butanal
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Q. What is the IUPAC name for the compound with the formula C4H9-CO-CH3?
A.
Butan-2-one
B.
Pentanal
C.
Butan-1-one
D.
Propan-2-one
Show solution
Solution
The compound is a ketone with a four-carbon chain, thus 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 formula C4H9-COOH?
A.
Butanoic acid
B.
Pentanoic acid
C.
Hexanoic acid
D.
Heptanoic acid
Show solution
Solution
The compound has four carbons in the longest chain and a carboxylic acid functional group, hence it is Butanoic acid.
Correct Answer:
A
— Butanoic acid
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Q. What is the IUPAC name for the compound with the formula C4H9Cl?
A.
1-Chlorobutane
B.
2-Chlorobutane
C.
Chloropropane
D.
Butyl chloride
Show solution
Solution
The compound is a chlorinated alkane with four carbons, and the chlorine is on the first carbon, making it 1-Chlorobutane.
Correct Answer:
A
— 1-Chlorobutane
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Q. What is the IUPAC name for the compound with the formula C5H10O?
A.
Pentanal
B.
2-Pentanone
C.
3-Pentanone
D.
Butanol
Show solution
Solution
The compound is a ketone with a five-carbon chain, and the carbonyl group is on the second carbon, making it 2-Pentanone.
Correct Answer:
B
— 2-Pentanone
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Q. What is the IUPAC name for the compound with the formula C5H11-COOH?
A.
Pentanoic acid
B.
Hexanoic acid
C.
Butanoic acid
D.
Heptanoic acid
Show solution
Solution
The longest carbon chain contains five carbons, and the functional group is a carboxylic acid, hence the name is Pentanoic acid.
Correct Answer:
A
— Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula C5H11-NH2?
A.
Pentylamine
B.
Butylamine
C.
Hexylamine
D.
Amylamine
Show solution
Solution
The compound is a primary amine with five carbons, hence it is named Pentylamine.
Correct Answer:
A
— Pentylamine
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Q. What is the IUPAC name for the compound with the formula C6H12?
A.
Hexane
B.
Cyclohexane
C.
1-Hexene
D.
2-Hexene
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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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Showing 31 to 60 of 233 (8 Pages)
Organic Chemistry Basics MCQ & Objective Questions
Understanding the fundamentals of Organic Chemistry is crucial for students preparing for school exams and competitive tests in India. Mastering Organic Chemistry Basics not only helps in grasping complex concepts but also enhances your ability to tackle MCQs and objective questions effectively. Regular practice with these questions can significantly improve your exam scores and boost your confidence.
What You Will Practise Here
Fundamental concepts of organic compounds and their classification
Key functional groups and their properties
Basic reaction mechanisms and types of organic reactions
Important nomenclature rules for organic compounds
Understanding isomerism and its types
Common organic chemistry reactions and their applications
Diagrams and structures of significant organic molecules
Exam Relevance
Organic Chemistry Basics is a vital topic in various examinations, including CBSE, State Boards, NEET, and JEE. Questions from this area often focus on identifying functional groups, predicting reaction outcomes, and applying nomenclature rules. Familiarity with common question patterns, such as multiple-choice questions and assertion-reason type questions, will help you excel in these exams.
Common Mistakes Students Make
Confusing structural isomers with stereoisomers
Overlooking the importance of functional groups in reactions
Misapplying nomenclature rules leading to incorrect compound names
Neglecting to balance chemical equations in reaction questions
Failing to recognize the significance of reaction mechanisms
FAQs
Question: What are some important Organic Chemistry Basics MCQ questions I should focus on?Answer: Focus on questions related to functional groups, reaction mechanisms, and nomenclature, as these are frequently tested in exams.
Question: How can I improve my understanding of Organic Chemistry Basics?Answer: Regular practice with objective questions and reviewing key concepts will enhance your understanding and retention.
Start solving practice MCQs today to test your understanding of Organic Chemistry Basics. This will not only prepare you for exams but also solidify your grasp of essential concepts. Your success in exams is just a question away!
