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. Which of the following is a characteristic of a redox reaction?
A.
Transfer of electrons
B.
Formation of precipitate
C.
Change in temperature
D.
Change in color
Show solution
Solution
Redox reactions are characterized by the transfer of electrons between species.
Correct Answer:
A
— Transfer of electrons
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Q. Which of the following is a characteristic of a solution?
A.
Heterogeneous mixture
B.
Uniform composition
C.
Variable composition
D.
Settles upon standing
Show solution
Solution
A solution has a uniform composition throughout.
Correct Answer:
B
— Uniform composition
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Q. Which of the following is a characteristic of a sound wave?
A.
Transverse wave
B.
Longitudinal wave
C.
Electromagnetic wave
D.
Static wave
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Solution
Sound waves are longitudinal waves, where the particle displacement is parallel to the direction of wave propagation.
Correct Answer:
B
— Longitudinal wave
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Q. Which of the following is a characteristic of a strong acid?
A.
Partially ionizes in solution
B.
Completely ionizes in solution
C.
Has a high pH
D.
Is a weak electrolyte
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Solution
A strong acid completely ionizes in solution.
Correct Answer:
B
— Completely ionizes in solution
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Q. Which of the following is a characteristic of a supercooled liquid?
A.
It has a definite shape
B.
It flows like a solid
C.
It has a higher viscosity than normal liquids
D.
It can exist below its freezing point
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Solution
Supercooled liquids can exist below their freezing point without solidifying.
Correct Answer:
D
— It can exist below its freezing point
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Q. Which of the following is a characteristic of adsorption isotherms?
A.
They describe the relationship between pressure and volume.
B.
They describe the relationship between concentration and temperature.
C.
They describe the relationship between the amount of adsorbate and pressure at constant temperature.
D.
They describe the relationship between the amount of adsorbate and the surface area.
Show solution
Solution
Adsorption isotherms describe the relationship between the amount of adsorbate and pressure at constant temperature.
Correct Answer:
C
— They describe the relationship between the amount of adsorbate and pressure at constant temperature.
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Q. Which of the following is a characteristic of alkanes?
A.
Unsaturated
B.
Cyclic
C.
Saturated
D.
Aromatic
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Solution
Alkanes are saturated hydrocarbons, meaning they contain only single bonds.
Correct Answer:
C
— Saturated
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Q. Which of the following is a characteristic of alpha particles?
A.
High penetration power
B.
No charge
C.
Consist of 2 protons and 2 neutrons
D.
Lightest form of radiation
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Solution
Alpha particles consist of 2 protons and 2 neutrons, making them a helium nucleus.
Correct Answer:
C
— Consist of 2 protons and 2 neutrons
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Q. Which of the following is a characteristic of amorphous solids?
A.
Long-range order
B.
Short-range order
C.
Definite melting point
D.
High thermal conductivity
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Solution
Amorphous solids have short-range order but lack long-range order.
Correct Answer:
B
— Short-range order
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Q. Which of the following is a characteristic of an endothermic reaction?
A.
Releases heat
B.
Absorbs heat
C.
No heat change
D.
Increases temperature of surroundings
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Solution
An endothermic reaction absorbs heat from the surroundings.
Correct Answer:
B
— Absorbs heat
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Q. Which of the following is a characteristic of an exothermic reaction?
A.
Absorbs heat
B.
Releases heat
C.
No heat change
D.
Requires energy input
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Solution
An exothermic reaction releases heat to the surroundings.
Correct Answer:
B
— Releases heat
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Q. Which of the following is a characteristic of an ideal fluid?
A.
Incompressible
B.
Viscous
C.
Non-conductive
D.
Reactive
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Solution
An ideal fluid is defined as incompressible and having no viscosity.
Correct Answer:
A
— Incompressible
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Q. Which of the following is a characteristic of an ideal gas?
A.
Attractive forces between molecules
B.
Volume of gas particles is significant
C.
Elastic collisions
D.
Non-zero molecular volume
Show solution
Solution
An ideal gas is characterized by elastic collisions between gas particles.
Correct Answer:
C
— Elastic collisions
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Q. Which of the following is a characteristic of aromatic compounds?
A.
Non-planar structure
B.
Presence of double bonds
C.
Follows Huckel's rule
D.
Saturated
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Solution
Aromatic compounds follow Huckel's rule, which states that they must have (4n + 2) π electrons in a cyclic, planar structure.
Correct Answer:
C
— Follows Huckel's rule
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Q. Which of the following is a characteristic of bases?
A.
Taste sour
B.
Turn litmus red
C.
Feel slippery
D.
Release H+ ions
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Solution
Bases feel slippery and can turn litmus paper blue.
Correct Answer:
C
— Feel slippery
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Q. Which of the following is a characteristic of beta decay?
A.
Emission of alpha particles
B.
Conversion of a neutron into a proton
C.
Emission of gamma rays
D.
No change in atomic number
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Solution
In beta decay, a neutron is converted into a proton, resulting in an increase in atomic number by one.
Correct Answer:
B
— Conversion of a neutron into a proton
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Q. Which of the following is a characteristic of carbohydrates?
A.
High energy density
B.
Soluble in organic solvents
C.
Hydrophilic nature
D.
Insoluble in water
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Solution
Carbohydrates are generally hydrophilic, meaning they are soluble in water.
Correct Answer:
C
— Hydrophilic nature
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Q. Which of the following is a characteristic of cellulose?
A.
Soluble in water
B.
Composed of glucose units
C.
Used for energy storage
D.
Contains α-1,4 glycosidic bonds
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Solution
Cellulose is composed of glucose units linked by β-1,4 glycosidic bonds and is not soluble in water.
Correct Answer:
B
— Composed of glucose units
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Q. Which of the following is a characteristic of chemisorption?
A.
Reversible process
B.
Low heat of adsorption
C.
Specificity to adsorbate
D.
Occurs at low temperatures
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Solution
Chemisorption is characterized by its specificity to adsorbate due to the formation of chemical bonds.
Correct Answer:
C
— Specificity to adsorbate
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Q. Which of the following is a characteristic of cis-trans isomers?
A.
Same connectivity, different spatial arrangement
B.
Different connectivity
C.
Same molecular formula, different molecular weight
D.
Different boiling points only
Show solution
Solution
Cis-trans isomers have the same connectivity but differ in the spatial arrangement of groups around a double bond.
Correct Answer:
A
— Same connectivity, different spatial arrangement
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Q. Which of the following is a characteristic of cycloalkanes?
A.
They are always aromatic
B.
They have a ring structure
C.
They are unsaturated
D.
They contain only single bonds
Show solution
Solution
Cycloalkanes have a ring structure and can be saturated or unsaturated.
Correct Answer:
B
— They have a ring structure
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Q. Which of the following is a characteristic of digital communication systems?
A.
Continuous signal representation
B.
Higher susceptibility to noise
C.
Easier encryption and security
D.
Lower data transmission rates
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Solution
Digital communication systems allow for easier encryption and security measures compared to analog systems.
Correct Answer:
C
— Easier encryption and security
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Q. Which of the following is a characteristic of digital signals?
A.
Continuous in nature
B.
Discrete in nature
C.
More susceptible to noise
D.
Require more bandwidth than analog signals
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Solution
Digital signals are discrete in nature, representing data in binary form, which makes them less susceptible to noise compared to analog signals.
Correct Answer:
B
— Discrete in nature
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Q. Which of the following is a characteristic of enzymes?
A.
They are consumed in reactions
B.
They increase the activation energy
C.
They are specific to substrates
D.
They function at all temperatures
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Solution
Enzymes are highly specific to their substrates, allowing them to catalyze specific biochemical reactions.
Correct Answer:
C
— They are specific to substrates
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Q. Which of the following is a characteristic of fibrous proteins?
A.
Soluble in water
B.
Structural role
C.
Globular shape
D.
Enzymatic activity
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Solution
Fibrous proteins are typically insoluble in water and serve structural roles in cells and tissues.
Correct Answer:
B
— Structural role
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Q. Which of the following is a characteristic of gamma radiation?
A.
It has mass
B.
It is positively charged
C.
It has high penetrating power
D.
It can be deflected by magnetic fields
Show solution
Solution
Gamma radiation is a form of electromagnetic radiation with high penetrating power and no mass or charge.
Correct Answer:
C
— It has high penetrating power
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Q. Which of the following is a characteristic of gases?
A.
Definite shape
B.
Definite volume
C.
Compressibility
D.
Incompressibility
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Solution
Gases are highly compressible, meaning their volume can change significantly under pressure.
Correct Answer:
C
— Compressibility
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Q. Which of the following is a characteristic of geometric isomers?
A.
Different connectivity of atoms
B.
Different spatial arrangement
C.
Different molecular formulas
D.
Different functional groups
Show solution
Solution
Geometric isomers have the same connectivity of atoms but differ in their spatial arrangement.
Correct Answer:
B
— Different spatial arrangement
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Q. Which of the following is a characteristic of hydrogen bonding?
A.
Occurs between two hydrogen atoms
B.
Involves a hydrogen atom bonded to a highly electronegative atom
C.
Is stronger than covalent bonds
D.
Is a type of ionic bond
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Solution
Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom like oxygen or nitrogen.
Correct Answer:
B
— Involves a hydrogen atom bonded to a highly electronegative atom
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Q. Which of the following is a characteristic of hydrogen bonds?
A.
They are stronger than covalent bonds
B.
They occur between hydrogen and electronegative atoms
C.
They are permanent
D.
They are ionic
Show solution
Solution
Hydrogen bonds occur between hydrogen and highly electronegative atoms like oxygen, nitrogen, or fluorine.
Correct Answer:
B
— They occur between hydrogen and electronegative atoms
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