JEE Main MCQ & Objective Questions
The JEE Main exam is a crucial step for students aspiring to enter prestigious engineering colleges in India. It tests not only knowledge but also the ability to apply concepts effectively. Practicing MCQs and objective questions is essential for scoring better, as it helps in familiarizing students with the exam pattern and enhances their problem-solving skills. Engaging with practice questions allows students to identify important questions and strengthen their exam preparation.
What You Will Practise Here
Fundamental concepts of Physics, Chemistry, and Mathematics
Key formulas and their applications in problem-solving
Important definitions and theories relevant to JEE Main
Diagrams and graphical representations for better understanding
Numerical problems and their step-by-step solutions
Previous years' JEE Main questions for real exam experience
Time management strategies while solving MCQs
Exam Relevance
The topics covered in JEE Main are not only significant for the JEE exam but also appear in various CBSE and State Board examinations. Many concepts are shared with the NEET syllabus, making them relevant across multiple competitive exams. Common question patterns include conceptual applications, numerical problems, and theoretical questions that assess a student's understanding of core subjects.
Common Mistakes Students Make
Misinterpreting the question stem, leading to incorrect answers
Neglecting units in numerical problems, which can change the outcome
Overlooking negative marking and not managing time effectively
Relying too heavily on rote memorization instead of understanding concepts
Failing to review and analyze mistakes from practice tests
FAQs
Question: How can I improve my speed in solving JEE Main MCQ questions?Answer: Regular practice with timed quizzes and focusing on shortcuts can significantly enhance your speed.
Question: Are the JEE Main objective questions similar to previous years' papers?Answer: Yes, many questions are based on previous years' patterns, so practicing them can be beneficial.
Question: What is the best way to approach JEE Main practice questions?Answer: Start with understanding the concepts, then attempt practice questions, and finally review your answers to learn from mistakes.
Now is the time to take charge of your preparation! Dive into solving JEE Main MCQs and practice questions to test your understanding and boost your confidence for the exam.
Q. What type of light is completely polarized?
A.
Unpolarized light
B.
Partially polarized light
C.
Linearly polarized light
D.
Circularly polarized light
Show solution
Solution
Linearly polarized light consists of waves that oscillate in a single plane, making it completely polarized.
Correct Answer:
C
— Linearly polarized light
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Q. What type of light is produced by a laser?
A.
Unpolarized light
B.
Partially polarized light
C.
Completely polarized light
D.
Diffused light
Show solution
Solution
Lasers emit light that is completely polarized because the light waves are emitted in a single direction and phase.
Correct Answer:
C
— Completely polarized light
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Q. What type of mechanism does the reaction of 2-bromopropane with a strong nucleophile follow?
A.
SN1
B.
SN2
C.
E1
D.
E2
Show solution
Solution
The reaction of 2-bromopropane with a strong nucleophile typically follows the SN2 mechanism due to steric hindrance.
Correct Answer:
B
— SN2
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Q. What type of orbit does a satellite in a geosynchronous orbit have?
A.
Elliptical orbit
B.
Circular orbit
C.
Parabolic orbit
D.
Hyperbolic orbit
Show solution
Solution
A geosynchronous satellite typically has a circular orbit to maintain a constant position relative to the Earth's surface.
Correct Answer:
B
— Circular orbit
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Q. What type of polymer is formed by the polymerization of unsaturated monomers?
A.
Addition polymer
B.
Condensation polymer
C.
Natural polymer
D.
Biopolymer
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Solution
Addition polymers are formed by the polymerization of unsaturated monomers.
Correct Answer:
A
— Addition polymer
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Q. What type of polymer is formed from the polymerization of isoprene?
A.
Natural rubber
B.
Nylon
C.
Polyethylene
D.
Polystyrene
Show solution
Solution
Natural rubber is formed from the polymerization of isoprene.
Correct Answer:
A
— Natural rubber
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Q. What type of polymer is formed when amino acids link together?
A.
Polysaccharides
B.
Proteins
C.
Nucleic acids
D.
Lipids
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Solution
Proteins are polymers formed by the linkage of amino acids through peptide bonds.
Correct Answer:
B
— Proteins
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Q. What type of polymerization involves the formation of a polymer by the reaction of monomers with functional groups?
A.
Addition polymerization
B.
Condensation polymerization
C.
Chain-growth polymerization
D.
Step-growth polymerization
Show solution
Solution
Condensation polymerization involves the reaction of monomers with functional groups, resulting in the elimination of small molecules.
Correct Answer:
B
— Condensation polymerization
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Q. What type of polymerization involves the formation of a polymer by the reaction of monomers with unsaturated bonds?
A.
Addition polymerization
B.
Condensation polymerization
C.
Chain-growth polymerization
D.
Step-growth polymerization
Show solution
Solution
Addition polymerization involves the reaction of monomers with unsaturated bonds to form a polymer.
Correct Answer:
A
— Addition polymerization
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Q. What type of polymerization involves the formation of a polymer from monomers with the elimination of a small molecule?
A.
Addition polymerization
B.
Condensation polymerization
C.
Chain-growth polymerization
D.
Step-growth polymerization
Show solution
Solution
Condensation polymerization involves the elimination of a small molecule, such as water.
Correct Answer:
B
— Condensation polymerization
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Q. What type of protein is hemoglobin?
A.
Enzyme
B.
Structural protein
C.
Transport protein
D.
Hormonal protein
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Solution
Hemoglobin is a transport protein that carries oxygen in the blood.
Correct Answer:
C
— Transport protein
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Q. What type of protein structure involves multiple polypeptide chains?
A.
Primary structure
B.
Secondary structure
C.
Tertiary structure
D.
Quaternary structure
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Solution
The quaternary structure of a protein is formed when two or more polypeptide chains assemble into a functional protein complex.
Correct Answer:
D
— Quaternary structure
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Q. What type of radiation is emitted during alpha decay?
A.
Electrons
B.
Helium nuclei
C.
Gamma rays
D.
Neutrons
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Solution
During alpha decay, helium nuclei (alpha particles) are emitted from the nucleus.
Correct Answer:
B
— Helium nuclei
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Q. What type of radiation is emitted during beta decay?
A.
Alpha particles
B.
Beta particles
C.
Gamma rays
D.
Neutrons
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Solution
Beta decay involves the emission of beta particles, which are electrons or positrons.
Correct Answer:
B
— Beta particles
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Q. What type of radiation is most penetrating?
A.
Alpha radiation
B.
Beta radiation
C.
Gamma radiation
D.
Neutron radiation
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Solution
Gamma radiation is the most penetrating type of radiation.
Correct Answer:
C
— Gamma radiation
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Q. What type of reaction do alkanes typically undergo?
A.
Addition
B.
Substitution
C.
Elimination
D.
Hydrolysis
Show solution
Solution
Alkanes typically undergo substitution reactions, especially with halogens.
Correct Answer:
B
— Substitution
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Q. What type of reaction do alkenes typically undergo?
A.
Substitution
B.
Addition
C.
Elimination
D.
Redox
Show solution
Solution
Alkenes typically undergo addition reactions due to the presence of double bonds.
Correct Answer:
B
— Addition
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Q. What type of reaction forms a peptide bond?
A.
Hydrolysis
B.
Condensation
C.
Oxidation
D.
Reduction
Show solution
Solution
A peptide bond is formed through a condensation reaction, where water is released.
Correct Answer:
B
— Condensation
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Q. What type of reaction forms peptide bonds between amino acids?
A.
Hydrolysis
B.
Condensation
C.
Redox
D.
Substitution
Show solution
Solution
Peptide bonds are formed through a condensation reaction, where a molecule of water is released.
Correct Answer:
B
— Condensation
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Q. What type of reaction forms peptide bonds?
A.
Hydrolysis
B.
Condensation
C.
Oxidation
D.
Reduction
Show solution
Solution
Peptide bonds are formed through a condensation reaction between amino acids.
Correct Answer:
B
— Condensation
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Q. What type of reaction forms polymers from monomers?
A.
Hydrolysis
B.
Dehydration synthesis
C.
Redox reaction
D.
Condensation reaction
Show solution
Solution
Dehydration synthesis is the reaction that links monomers together to form polymers by removing water.
Correct Answer:
B
— Dehydration synthesis
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Q. What type of reaction occurs when 1-bromopropane reacts with potassium cyanide?
A.
Elimination
B.
Substitution
C.
Addition
D.
Redox
Show solution
Solution
The reaction is a nucleophilic substitution where the cyanide ion replaces the bromine atom.
Correct Answer:
B
— Substitution
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Q. What type of reaction occurs when 2-bromobutane is treated with sodium ethoxide?
A.
Nucleophilic substitution
B.
Elimination
C.
Addition
D.
Redox
Show solution
Solution
The treatment of 2-bromobutane with sodium ethoxide leads to an elimination reaction, forming an alkene.
Correct Answer:
B
— Elimination
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Q. What type of reaction occurs when alkenes are converted to alkanes?
A.
Addition
B.
Substitution
C.
Elimination
D.
Oxidation
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Solution
The conversion of alkenes to alkanes involves the addition of hydrogen (hydrogenation).
Correct Answer:
A
— Addition
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Q. What type of reaction occurs when alkenes react with hydrogen?
A.
Hydrolysis
B.
Hydrogenation
C.
Dehydrogenation
D.
Oxidation
Show solution
Solution
The reaction of alkenes with hydrogen is called hydrogenation.
Correct Answer:
B
— Hydrogenation
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Q. What type of reaction occurs when alkenes undergo hydrogenation?
A.
Addition
B.
Substitution
C.
Elimination
D.
Oxidation
Show solution
Solution
Hydrogenation is an addition reaction where hydrogen is added across the double bond.
Correct Answer:
A
— Addition
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Q. What type of reaction occurs when an alcohol reacts with an acid to form an ether?
A.
Esterification
B.
Dehydration
C.
Condensation
D.
Hydrolysis
Show solution
Solution
The reaction between an alcohol and an acid to form an ether is a condensation reaction.
Correct Answer:
C
— Condensation
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Q. What type of reaction occurs when an alkene reacts with hydrogen in the presence of a catalyst?
A.
Hydration
B.
Hydrogenation
C.
Halogenation
D.
Oxidation
Show solution
Solution
The reaction of an alkene with hydrogen in the presence of a catalyst is called hydrogenation.
Correct Answer:
B
— Hydrogenation
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Q. What type of reaction occurs when an alkene reacts with hydrogen?
A.
Hydration
B.
Hydrogenation
C.
Dehydrogenation
D.
Halogenation
Show solution
Solution
Hydrogenation is the addition of hydrogen to an alkene, converting it to an alkane.
Correct Answer:
B
— Hydrogenation
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Q. What type of reaction occurs when an alkene reacts with water in the presence of an acid?
A.
Hydrolysis
B.
Dehydration
C.
Hydrogenation
D.
Halogenation
Show solution
Solution
The reaction of an alkene with water in the presence of an acid is called hydrolysis.
Correct Answer:
A
— Hydrolysis
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