The Chemistry (School & UG) category covers the fundamental to advanced concepts of Chemistry , structured to support Class 11–12 students, competitive exam aspirants, and undergraduate learners . The content emphasizes conceptual clarity, problem-solving skills, and strong alignment with NCERT and university syllabi .
In this category, you will study:
Physical Chemistry – atomic structure, thermodynamics, chemical kinetics, equilibrium, electrochemistry, and solutions
Organic Chemistry – basic principles, reaction mechanisms, hydrocarbons, functional groups, biomolecules, and polymers
Inorganic Chemistry – periodic trends, chemical bonding, coordination compounds, metallurgy, and s-, p-, d-, and f-block elements
Numerical problem-solving – formula-based calculations, mole concept, and graph-based questions
Reaction mechanisms and derivations with step-by-step explanations
Comparisons, trends, and exceptions important for exams
NCERT-based theory , supported by diagrams, tables, MCQs, assertion–reason questions, numericals, and PYQs
The content is designed to build strong foundations , improve analytical and quantitative skills , and prepare students for school examinations, competitive exams, and undergraduate assessments .
Develop a clear, logical, and application-oriented understanding of Chemistry to excel academically and confidently tackle problem-based and conceptual questions at both school and UG levels .
Q. What is the IUPAC name of CH3CH2Br?
A.
Bromoethane
B.
Ethyl bromide
C.
Bromomethane
D.
Ethane bromide
Show solution
Solution
The correct IUPAC name for CH3CH2Br is Bromoethane, as it consists of a two-carbon chain with a bromine substituent.
Correct Answer:
A
— Bromoethane
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Q. What is the IUPAC name of CH3CH2OH?
A.
Ethanol
B.
Methanol
C.
Propanol
D.
Butanol
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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 the compound CH3-CH2-CH(CH3)-CH2-Br?
A.
1-bromobutane
B.
2-bromobutane
C.
3-bromobutane
D.
1-bromo-2-methylpropane
Show solution
Solution
The longest carbon chain has four carbons, and the bromine is attached to the second carbon, making the IUPAC name 2-bromobutane.
Correct Answer:
B
— 2-bromobutane
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Q. What is the IUPAC name of the compound CH3-CH2-CH2-CH=CH2?
A.
1-pentene
B.
2-pentene
C.
3-pentene
D.
1-butene
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Solution
The longest carbon chain contains 5 carbons with a double bond at the first carbon, making it 1-pentene.
Correct Answer:
A
— 1-pentene
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Q. What is the IUPAC name of the compound CH3-CH2-NH2?
A.
Ethylamine
B.
Propylamine
C.
Dimethylamine
D.
Isopropylamine
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Solution
The compound CH3-CH2-NH2 is named ethylamine according to IUPAC nomenclature.
Correct Answer:
A
— Ethylamine
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Q. What is the IUPAC name of the compound formed when benzene undergoes sulfonation with sulfuric acid?
A.
Benzene sulfonic acid
B.
Benzene thiosulfate
C.
Benzene sulfate
D.
Benzene disulfide
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Solution
The product is benzene sulfonic acid, formed by the addition of a sulfonyl group to the benzene ring.
Correct Answer:
A
— Benzene sulfonic acid
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Q. What is the IUPAC name of the compound formed when phenol is treated with acetic anhydride?
A.
Acetophenone
B.
Phenyl acetate
C.
Benzyl acetate
D.
Phenyl acetic acid
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Solution
The compound formed is acetophenone, which results from the acetylation of phenol.
Correct Answer:
A
— Acetophenone
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Q. What is the IUPAC name of the compound formed when phenol undergoes bromination?
A.
Bromophenol
B.
2-Bromophenol
C.
4-Bromophenol
D.
Bromobenzene
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Solution
Bromination of phenol typically occurs at the ortho or para positions, with 2-bromophenol being one of the major products.
Correct Answer:
B
— 2-Bromophenol
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Q. What is the IUPAC name of the compound with the formula C3H6O?
A.
Propanal
B.
Propan-2-one
C.
Cyclopropanol
D.
Propene
Show solution
Solution
The compound C3H6O can be identified as a ketone, specifically Propan-2-one, which has the carbonyl group on the second carbon.
Correct Answer:
B
— Propan-2-one
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Q. What is the IUPAC name of the compound with the formula C4H10O that has a branched structure?
A.
Butanol
B.
2-Butanol
C.
Butoxyethane
D.
1-Butanol
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Solution
The compound with the formula C4H10O and a branched structure is 2-Butanol, which has the hydroxyl group (-OH) on the second carbon.
Correct Answer:
B
— 2-Butanol
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Q. What is the IUPAC name of the compound with the formula C4H9Br?
A.
1-bromobutane
B.
2-bromobutane
C.
1-bromo-2-methylpropane
D.
2-bromo-2-methylpropane
Show solution
Solution
The compound with the formula C4H9Br is 1-bromobutane, as it is a straight-chain brominated alkane.
Correct Answer:
A
— 1-bromobutane
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Q. What is the IUPAC name of the compound with the formula C5H10O that contains a ketone functional group?
A.
2-Pentanone
B.
3-Pentanone
C.
1-Pentanone
D.
Pentanal
Show solution
Solution
The compound is a ketone with five carbon atoms. The longest carbon chain is pentane, and the ketone group is on the second carbon, making it 2-Pentanone.
Correct Answer:
A
— 2-Pentanone
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Q. What is the IUPAC name of the compound with the formula C5H10O?
A.
Pentanal
B.
2-Pentanone
C.
Pentanol
D.
Cyclopentanol
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Solution
The compound C5H10O can be a ketone, and the longest carbon chain with the carbonyl group is 5 carbons long, making it 2-Pentanone.
Correct Answer:
B
— 2-Pentanone
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Q. What is the IUPAC name of the compound with the formula C5H12?
A.
Pentane
B.
Butane
C.
Hexane
D.
Propane
Show solution
Solution
The compound C5H12 is an alkane with five carbon atoms, which is named pentane.
Correct Answer:
A
— Pentane
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Q. What is the IUPAC name of the compound with the formula C6H5-CH2-COOH?
A.
Benzyl acetic acid
B.
Phenylacetic acid
C.
Benzenepropanoic acid
D.
Benzeneacetic acid
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Solution
The correct IUPAC name is phenylacetic acid, as it has a phenyl group attached to the acetic acid structure.
Correct Answer:
B
— Phenylacetic acid
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Q. What is the IUPAC name of the compound with the formula C6H5-CO-CH3?
A.
Acetophenone
B.
Benzophenone
C.
Phenylacetone
D.
Benzylacetone
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Solution
The compound is acetophenone, which consists of a phenyl group attached to a carbonyl group and a methyl group.
Correct Answer:
A
— Acetophenone
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Q. What is the IUPAC name of the compound with the formula C6H5CH2COOH?
A.
Benzyl acetic acid
B.
Phenylacetic acid
C.
Benzenepropanoic acid
D.
Benzeneacetic acid
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Solution
The correct IUPAC name is phenylacetic acid, as it contains a phenyl group attached to an acetic acid moiety.
Correct Answer:
B
— Phenylacetic acid
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Q. What is the IUPAC name of the compound with the formula C6H5CH2OH?
A.
Benzyl alcohol
B.
Phenol
C.
Benzene-1-ol
D.
Benzeneethanol
Show solution
Solution
The IUPAC name of C6H5CH2OH is benzyl alcohol, which consists of a benzene ring attached to a -CH2OH group.
Correct Answer:
A
— Benzyl alcohol
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Q. What is the IUPAC name of the compound with the formula C6H5NO2?
A.
Nitrobenzene
B.
Aniline
C.
Benzamide
D.
Benzonitrile
Show solution
Solution
The IUPAC name of C6H5NO2 is nitrobenzene, which contains a nitro group (-NO2) attached to a benzene ring.
Correct Answer:
A
— Nitrobenzene
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Q. What is the IUPAC name of the compound with the formula CH3-CH(CH3)-CH2-CHO?
A.
3-methylbutanal
B.
2-methylbutanal
C.
4-methylbutanal
D.
2-methylpropanal
Show solution
Solution
The longest carbon chain contains 4 carbons, and the aldehyde group is at the end, making it 3-methylbutanal.
Correct Answer:
A
— 3-methylbutanal
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Q. What is the IUPAC name of the compound with the formula CH3-CH2-CH(CH3)-CH2-Br?
A.
1-bromo-3-methylbutane
B.
2-bromo-3-methylbutane
C.
3-bromo-2-methylbutane
D.
2-bromo-4-methylbutane
Show solution
Solution
The longest carbon chain has four carbons, and the bromine is on the first carbon, making it 1-bromo-3-methylbutane.
Correct Answer:
B
— 2-bromo-3-methylbutane
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Q. What is the IUPAC name of the compound with the formula CH3-CH2-CH(CH3)-CH2-CH3?
A.
2-pentyl
B.
3-methylpentane
C.
2-methylpentane
D.
3-pentyl
Show solution
Solution
The longest carbon chain has five carbons, and the methyl group is on the third carbon, making it 3-methylpentane.
Correct Answer:
B
— 3-methylpentane
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Q. What is the IUPAC name of the compound with the formula [Co(NH3)5Cl]Cl2?
A.
Pentaamminechlorocobalt(III) chloride
B.
Chloropentaamminecobalt(II) chloride
C.
Pentaamminecobalt(II) chloride
D.
Pentaamminechlorocobalt(II) chloride
Show solution
Solution
The complex has a cobalt ion in the +3 oxidation state, and the correct IUPAC name is Pentaamminechlorocobalt(III) chloride.
Correct Answer:
A
— Pentaamminechlorocobalt(III) chloride
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Q. What is the IUPAC name of the compound with the structure C6H5-CH2-COOH?
A.
Benzyl acetic acid
B.
Phenylacetic acid
C.
Benzenepropanoic acid
D.
Benzeneacetic acid
Show solution
Solution
The correct IUPAC name is phenylacetic acid, as it consists of a phenyl group attached to an acetic acid moiety.
Correct Answer:
B
— Phenylacetic acid
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Q. What is the IUPAC name of the compound with the structure CH3-CH(CH3)-C(=O)-OH?
A.
2-methylbutanoic acid
B.
3-methylbutanoic acid
C.
2-methylpropanoic acid
D.
3-methylpropanoic acid
Show solution
Solution
The compound is a carboxylic acid with a methyl group on the second carbon, making it 2-methylbutanoic acid.
Correct Answer:
A
— 2-methylbutanoic acid
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Q. What is the IUPAC name of the compound with the structure CH3-CH(CH3)-CH2-CH3?
A.
2-methylbutane
B.
3-methylbutane
C.
2-pentene
D.
2-butene
Show solution
Solution
The longest carbon chain has 4 carbons (butane) with a methyl group on the second carbon, making it 2-methylbutane.
Correct Answer:
A
— 2-methylbutane
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Q. What is the IUPAC name of the compound with the structure CH3-CH2-CH(CH3)-Br?
A.
1-bromo-2-methylpropane
B.
2-bromo-3-methylbutane
C.
3-bromobutane
D.
1-bromo-3-methylbutane
Show solution
Solution
The correct IUPAC name is 1-bromo-2-methylpropane, as the longest carbon chain has three carbons and the bromine is on the first carbon.
Correct Answer:
A
— 1-bromo-2-methylpropane
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Q. What is the IUPAC name of the compound with the structure of a benzene ring with a nitro group and a methyl group at the 1 and 2 positions respectively?
A.
2-Nitrotoluene
B.
1-Nitrotoluene
C.
2-Methyl-1-nitrobenzene
D.
1-Methyl-2-nitrobenzene
Show solution
Solution
The correct IUPAC name is 1-Methyl-2-nitrobenzene, indicating the positions of the substituents on the benzene ring.
Correct Answer:
D
— 1-Methyl-2-nitrobenzene
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Q. What is the IUPAC name of the compound [Cr(NH3)6]Cl3?
A.
Hexaammonium chromium(III) chloride
B.
Hexaammonia chromium(III) chloride
C.
Hexaammine chromium(III) chloride
D.
Hexaammonium chromium(II) chloride
Show solution
Solution
The correct IUPAC name is Hexaammine chromium(III) chloride, where 'ammine' indicates the ammonia ligands and chromium is in the +3 oxidation state.
Correct Answer:
C
— Hexaammine chromium(III) chloride
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Q. What is the main advantage of high-performance liquid chromatography (HPLC) over traditional liquid chromatography?
A.
Higher resolution and speed
B.
Lower cost of operation
C.
Simpler instrumentation
D.
Use of larger sample volumes
Show solution
Solution
HPLC offers higher resolution and speed due to the use of high pressure to push solvents through the column, allowing for better separation of components.
Correct Answer:
A
— Higher resolution and speed
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