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 type of isomerism is commonly observed in coordination compounds according to Werner's theory?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
All of the above
Show solution
Solution
Coordination compounds can exhibit structural, geometric, and optical isomerism, making all types relevant.
Correct Answer:
D
— All of the above
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Q. What type of isomerism is exhibited by 1,2-dichloroethene?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
1,2-dichloroethene can exist as cis and trans isomers due to the restricted rotation around the double bond.
Correct Answer:
B
— Geometric isomerism
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Q. What type of isomerism is exhibited by 1-bromobutane and 2-bromobutane?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
1-bromobutane and 2-bromobutane differ in the connectivity of their atoms, which is a characteristic of structural isomerism.
Correct Answer:
A
— Structural isomerism
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Q. What type of isomerism is exhibited by 1-butene and 2-butene?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
1-butene and 2-butene exhibit geometric isomerism due to the different spatial arrangements of the substituents around the double bond.
Correct Answer:
B
— Geometric isomerism
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Q. What type of isomerism is exhibited by 1-butene and cis-2-butene?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
1-butene and cis-2-butene are geometric isomers due to the different spatial arrangements around the double bond.
Correct Answer:
B
— Geometric isomerism
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Q. What type of isomerism is exhibited by 2-butene?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
2-butene exhibits geometric isomerism (cis/trans) due to the restricted rotation around the double bond.
Correct Answer:
B
— Geometric isomerism
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Q. What type of isomerism is exhibited by 2-pentene?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
2-pentene exhibits geometric isomerism due to the presence of a double bond, allowing for cis and trans forms.
Correct Answer:
B
— Geometric isomerism
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Q. What type of isomerism is exhibited by butene (C4H8)?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
Butene exhibits geometric isomerism due to the presence of a double bond, allowing for cis and trans configurations.
Correct Answer:
B
— Geometric isomerism
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Q. What type of isomerism is exhibited by D-glucose and L-glucose?
A.
Structural isomerism
B.
Geometric isomerism
C.
Enantiomerism
D.
Conformational isomerism
Show solution
Solution
D-glucose and L-glucose are enantiomers, differing in configuration at their chiral centers.
Correct Answer:
C
— Enantiomerism
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Q. What type of isomerism is exhibited by glucose and fructose?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
Glucose and fructose are structural isomers as they have the same molecular formula but different structures.
Correct Answer:
A
— Structural isomerism
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Q. What type of isomerism is exhibited by polymers with chiral centers?
A.
Geometric isomerism
B.
Structural isomerism
C.
Stereoisomerism
D.
Functional isomerism
Show solution
Solution
Polymers with chiral centers can exhibit stereoisomerism, which includes configurations that differ in the spatial arrangement of atoms.
Correct Answer:
C
— Stereoisomerism
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Q. What type of isomerism is exhibited by polymers with different arrangements of their substituents?
A.
Geometric isomerism
B.
Structural isomerism
C.
Stereoisomerism
D.
Conformational isomerism
Show solution
Solution
Geometric isomerism occurs in polymers when substituents are arranged differently around a double bond, leading to cis and trans forms.
Correct Answer:
A
— Geometric isomerism
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Q. What type of isomerism is exhibited by the complex [Co(NH3)4Cl2]+?
A.
Geometric
B.
Optical
C.
Linkage
D.
Coordination
Show solution
Solution
Geometric isomerism is exhibited due to the different arrangements of ligands around the metal center.
Correct Answer:
A
— Geometric
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Q. What type of isomerism is exhibited by the complex [Co(NH3)4Cl2]Cl?
A.
Geometric
B.
Optical
C.
Linkage
D.
Coordination
Show solution
Solution
The complex [Co(NH3)4Cl2]Cl exhibits geometric isomerism due to the arrangement of ligands.
Correct Answer:
A
— Geometric
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Q. What type of isomerism is shown by [Co(NH3)4Cl2]+?
A.
Geometric
B.
Optical
C.
Linkage
D.
Coordination
Show solution
Solution
The complex [Co(NH3)4Cl2]+ exhibits geometric isomerism due to the different arrangements of ligands.
Correct Answer:
A
— Geometric
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Q. What type of isomerism is shown by [Co(NH3)4Cl2]Cl?
A.
Geometric
B.
Optical
C.
Linkage
D.
Coordination
Show solution
Solution
This complex exhibits geometric isomerism due to the different arrangements of ligands.
Correct Answer:
A
— Geometric
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Q. What type of molecular vibrations are primarily observed in IR spectroscopy?
A.
Rotational transitions
B.
Electronic transitions
C.
Vibrational transitions
D.
Nuclear transitions
Show solution
Solution
IR spectroscopy primarily observes vibrational transitions of molecules, which occur when bonds stretch or bend.
Correct Answer:
C
— Vibrational transitions
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Q. What type of polymer is formed when amino acids link together through peptide bonds?
A.
Polysaccharide
B.
Protein
C.
Nucleic acid
D.
Lipid
Show solution
Solution
Proteins are polymers formed by the linkage of amino acids through peptide bonds, which are a type of condensation reaction.
Correct Answer:
B
— Protein
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Q. What type of reaction mechanism is involved when a nucleophile replaces a leaving group in an alkyl halide?
A.
Elimination
B.
Substitution
C.
Addition
D.
Rearrangement
Show solution
Solution
This is a substitution reaction mechanism, where a nucleophile replaces a leaving group.
Correct Answer:
B
— Substitution
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Q. What type of reaction mechanism is involved when an alkyl halide reacts with a nucleophile to form an alcohol?
A.
Elimination
B.
Substitution
C.
Addition
D.
Rearrangement
Show solution
Solution
This reaction is a substitution mechanism (S_N2 or S_N1) where the nucleophile replaces the halide.
Correct Answer:
B
— Substitution
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Q. What type of reaction occurs when 1-hexene reacts with HBr?
A.
Addition
B.
Substitution
C.
Elimination
D.
Oxidation
Show solution
Solution
The reaction is an electrophilic addition where HBr adds across the double bond of 1-hexene.
Correct Answer:
A
— Addition
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Q. What type of reaction occurs when 1-pentene reacts with HBr?
A.
Addition reaction
B.
Elimination reaction
C.
Substitution reaction
D.
Redox reaction
Show solution
Solution
The reaction of 1-pentene with HBr is an addition reaction, where HBr adds across the double bond.
Correct Answer:
A
— Addition reaction
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Q. What type of reaction occurs when 2-bromobutane reacts with sodium ethoxide?
A.
SN1
B.
SN2
C.
E1
D.
E2
Show solution
Solution
The reaction of 2-bromobutane with sodium ethoxide is an E2 elimination reaction, leading to the formation of an alkene.
Correct Answer:
D
— E2
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Q. What type of reaction occurs when a haloalkane reacts with a nucleophile?
A.
Elimination
B.
Substitution
C.
Addition
D.
Redox
Show solution
Solution
The reaction of a haloalkane with a nucleophile typically results in a substitution reaction, where the nucleophile replaces the halogen.
Correct Answer:
B
— Substitution
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Q. What type of reaction occurs when a transition metal complex is reduced?
A.
Oxidation
B.
Reduction
C.
Hydrolysis
D.
Precipitation
Show solution
Solution
Reduction of a transition metal complex involves the gain of electrons, which is the definition of a reduction reaction.
Correct Answer:
B
— Reduction
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Q. What type of reaction occurs when an acid reacts with a metal?
A.
Redox reaction
B.
Decomposition
C.
Neutralization
D.
Synthesis
Show solution
Solution
The reaction between an acid and a metal is a redox reaction, where the metal is oxidized.
Correct Answer:
A
— Redox reaction
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Q. What type of reaction occurs when an alcohol is converted to an alkene?
A.
Hydration
B.
Dehydration
C.
Oxidation
D.
Reduction
Show solution
Solution
The conversion of an alcohol to an alkene involves the removal of water, which is a dehydration reaction.
Correct Answer:
B
— Dehydration
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Q. What type of reaction occurs when an alcohol is converted to an alkyl halide using phosphorus tribromide (PBr3)?
A.
Substitution
B.
Elimination
C.
Addition
D.
Redox
Show solution
Solution
The reaction is a substitution reaction where the hydroxyl group of the alcohol is replaced by a bromine atom.
Correct Answer:
A
— Substitution
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Q. What type of reaction occurs when an alcohol is dehydrated?
A.
Substitution
B.
Elimination
C.
Addition
D.
Redox
Show solution
Solution
Dehydration of an alcohol is an elimination reaction where water is removed, typically forming an alkene.
Correct Answer:
B
— Elimination
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Q. What type of reaction occurs when an alcohol reacts with a carboxylic acid to form an ester?
A.
Hydrolysis
B.
Esterification
C.
Oxidation
D.
Reduction
Show solution
Solution
The reaction between an alcohol and a carboxylic acid to form an ester is known as esterification.
Correct Answer:
B
— Esterification
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