Q. What is the IUPAC name of CH3-CH2-CH2-CH3?
A.
Butane
B.
Propane
C.
Pentane
D.
Hexane
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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
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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
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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
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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
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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
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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
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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 CH3CH2OCH2CH3?
A.
Ethyl methyl ether
B.
Dimethyl ether
C.
Diethyl ether
D.
Ethyl ether
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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 CH3CHO?
A.
Ethanal
B.
Propanal
C.
Acetaldehyde
D.
Butanal
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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 CH3COCH2CH3?
A.
Butan-2-one
B.
Butanal
C.
Propan-2-one
D.
Pentanal
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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
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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
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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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Q. What is the IUPAC name of CH3NH2?
A.
Methylamine
B.
Ethylamine
C.
Propylamine
D.
Dimethylamine
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Solution
The IUPAC name of CH3NH2 is methylamine.
Correct Answer:
A
— Methylamine
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Q. What is the IUPAC name of the alkane with the formula C5H12?
A.
Pentane
B.
Butane
C.
Hexane
D.
Propane
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Solution
The alkane with the formula C5H12 is named Pentane.
Correct Answer:
A
— Pentane
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Q. What is the IUPAC name of the alkane with the formula C6H14?
A.
Hexane
B.
Pentane
C.
Heptane
D.
Octane
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Solution
The alkane with the formula C6H14 is named Hexane.
Correct Answer:
A
— Hexane
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Q. What is the IUPAC name of the alkene with the formula C5H10?
A.
Pentene
B.
Butene
C.
Hexene
D.
Cyclopentene
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Solution
The IUPAC name of the alkene with the formula C5H10 is pentene.
Correct Answer:
A
— Pentene
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Q. What is the IUPAC name of the compound CH2=CH-CH2-CH3?
A.
Butene
B.
Propene
C.
1-Butene
D.
2-Butene
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Solution
The compound CH2=CH-CH2-CH3 is named 1-Butene as the double bond is between the first and second carbon.
Correct Answer:
C
— 1-Butene
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Q. What is the IUPAC name of the compound CH3-CH2-CH2-CH3?
A.
Butane
B.
Propane
C.
Pentane
D.
Hexane
Show solution
Solution
The IUPAC name for CH3-CH2-CH2-CH3 is Butane.
Correct Answer:
A
— Butane
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Q. What is the IUPAC name of the compound CH≡C-CH2-CH3?
A.
1-butyne
B.
2-butyne
C.
1-pentyne
D.
3-pentyne
Show solution
Solution
The IUPAC name of CH≡C-CH2-CH3 is 1-butyne.
Correct Answer:
A
— 1-butyne
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Q. What is the IUPAC name of the compound with the formula C2H5-CO-CH3?
A.
Butan-2-one
B.
Propan-2-one
C.
Butan-1-one
D.
Propan-1-one
Show solution
Solution
The compound is a ketone with four carbons, and the carbonyl group is on the second carbon, thus it is Butan-2-one.
Correct Answer:
A
— Butan-2-one
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Q. What is the IUPAC name of the compound with the formula C4H6?
A.
1-butyne
B.
2-butyne
C.
Cyclobutene
D.
Butadiene
Show solution
Solution
The compound C4H6 is named 2-butyne according to IUPAC nomenclature.
Correct Answer:
B
— 2-butyne
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Q. What is the IUPAC name of 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 and an aldehyde functional group, making the correct name Benzylaldehyde.
Correct Answer:
B
— Benzylaldehyde
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Q. What is the IUPAC name of the compound with the formula C6H5CH3?
A.
Toluene
B.
Benzaldehyde
C.
Phenol
D.
Aniline
Show solution
Solution
The compound C6H5CH3 is known as toluene, which is a methyl-substituted derivative of benzene.
Correct Answer:
A
— Toluene
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Q. What is the IUPAC name of 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, and there are 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 Kb of ammonia (NH3) if the pKa of its conjugate acid (NH4+) is 9.25?
A.
1.8 x 10^-5
B.
5.6 x 10^-10
C.
1.0 x 10^-14
D.
3.2 x 10^-5
Show solution
Solution
Kb = Kw / Ka = 1.0 x 10^-14 / 5.6 x 10^-10 = 1.8 x 10^-5
Correct Answer:
A
— 1.8 x 10^-5
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Q. What is the Ksp expression for the salt Ag2SO4?
A.
Ksp = [Ag+]^2[SO4^2-]
B.
Ksp = [Ag2+]^2[SO4^2-]
C.
Ksp = [Ag+]^2[SO4^2-]^2
D.
Ksp = [Ag+]^2[SO4^2-]^3
Show solution
Solution
The solubility product constant (Ksp) for Ag2SO4 is given by Ksp = [Ag+]^2[SO4^2-] because the dissociation is Ag2SO4 ⇌ 2Ag+ + SO4^2-.
Correct Answer:
A
— Ksp = [Ag+]^2[SO4^2-]
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Q. What is the Ksp of AgCl if the solubility of AgCl in water is 1.0 x 10^-5 M?
A.
1.0 x 10^-10
B.
1.0 x 10^-5
C.
1.0 x 10^-15
D.
1.0 x 10^-20
Show solution
Solution
Ksp = [Ag+][Cl-] = (1.0 x 10^-5)(1.0 x 10^-5) = 1.0 x 10^-10.
Correct Answer:
A
— 1.0 x 10^-10
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Q. What is the limiting reagent when 3 moles of A react with 2 moles of B to produce 4 moles of C?
Show solution
Solution
The reaction requires 1.5 moles of B for 3 moles of A. Since only 2 moles of B are available, B is the limiting reagent.
Correct Answer:
B
— B
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Q. What is the limiting reagent when 5 moles of A react with 3 moles of B in the reaction A + 2B → C?
Show solution
Solution
The reaction requires 2 moles of B for every mole of A. For 5 moles of A, 10 moles of B are needed. Since only 3 moles of B are available, B is the limiting reagent.
Correct Answer:
B
— B
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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!
