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 processes results in an increase in entropy?
A.
Isothermal compression
B.
Adiabatic expansion
C.
Isobaric heating
D.
All of the above
Show solution
Solution
Isobaric heating increases the temperature and volume of the gas, leading to an increase in entropy.
Correct Answer:
C
— Isobaric heating
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Q. Which of the following properties is characteristic of liquids?
A.
Definite shape
B.
Definite volume
C.
Compressibility
D.
High viscosity
Show solution
Solution
Liquids have a definite volume but take the shape of their container.
Correct Answer:
B
— Definite volume
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Q. Which of the following properties is NOT associated with liquids?
A.
Surface tension
B.
Viscosity
C.
Compressibility
D.
Fluidity
Show solution
Solution
Liquids are generally incompressible, so compressibility is not a property associated with them.
Correct Answer:
C
— Compressibility
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Q. Which of the following properties is NOT typical of elastomers?
A.
High elasticity
B.
Low tensile strength
C.
Good resilience
D.
Brittleness
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Solution
Brittleness is not a typical property of elastomers; they are known for their high elasticity and resilience.
Correct Answer:
D
— Brittleness
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Q. Which of the following properties is NOT typical of liquids?
A.
High density
B.
Low compressibility
C.
Fixed volume
D.
Fixed shape
Show solution
Solution
Liquids have a fixed volume but do not have a fixed shape; they take the shape of their container.
Correct Answer:
D
— Fixed shape
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Q. Which of the following properties of liquids is affected by temperature?
A.
Density
B.
Viscosity
C.
Surface tension
D.
All of the above
Show solution
Solution
All these properties change with temperature; for example, viscosity decreases with increasing temperature.
Correct Answer:
D
— All of the above
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Q. Which of the following quantities has the dimension of energy?
A.
Force
B.
Work
C.
Power
D.
Pressure
Show solution
Solution
Work is defined as force times distance, and its dimensions are ML^2T^-2, which are the same as energy.
Correct Answer:
B
— Work
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Q. Which of the following quantities has the dimension of [M^0 L^0 T^-1]?
A.
Velocity
B.
Acceleration
C.
Frequency
D.
Force
Show solution
Solution
Frequency has the dimension of [M^0 L^0 T^-1] as it is defined as the number of cycles per unit time.
Correct Answer:
C
— Frequency
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Q. Which of the following quantities has the dimension of [M^0 L^0 T^0]?
A.
Mass
B.
Time
C.
Length
D.
Angle
Show solution
Solution
Angle is a dimensionless quantity and has the dimension of [M^0 L^0 T^0].
Correct Answer:
D
— Angle
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Q. Which of the following quantities has the dimension of [M^0 L^1 T^-1]?
A.
Velocity
B.
Acceleration
C.
Force
D.
Pressure
Show solution
Solution
Velocity has the dimension of [M^0 L^1 T^-1], as it is defined as distance per unit time.
Correct Answer:
A
— Velocity
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Q. Which of the following quantities has the dimension of [M^0L^2T^-2]?
A.
Energy
B.
Force
C.
Power
D.
Work
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Solution
Energy and work both have the same dimensions of [M^1L^2T^-2]. Power has dimensions of [M^1L^2T^-3].
Correct Answer:
A
— Energy
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Q. Which of the following quantities has the dimension of [M^1 L^2 T^-2]?
A.
Pressure
B.
Energy
C.
Force
D.
Work
Show solution
Solution
Energy has the dimension of [M^1 L^2 T^-2].
Correct Answer:
B
— Energy
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Q. Which of the following quantities has the dimension of [M⁰L²T⁻²]?
A.
Energy
B.
Force
C.
Power
D.
Work
Show solution
Solution
Energy and work both have the same dimensions of [M⁰L²T⁻²], as they are equivalent.
Correct Answer:
A
— Energy
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Q. Which of the following quantities has the dimension [M^0 L^0 T^0]?
A.
Mass
B.
Time
C.
Length
D.
Angle
Show solution
Solution
Angle is a dimensionless quantity and has the dimension [M^0 L^0 T^0].
Correct Answer:
D
— Angle
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Q. Which of the following quantities has the dimension [M^0 L^1 T^-1]?
A.
Velocity
B.
Acceleration
C.
Force
D.
Pressure
Show solution
Solution
Velocity has the dimension [M^0 L^1 T^-1], as it is defined as distance per unit time.
Correct Answer:
A
— Velocity
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Q. Which of the following quantities has the dimension [M^1 L^2 T^-2]?
A.
Energy
B.
Force
C.
Pressure
D.
Power
Show solution
Solution
Energy has the dimension [M^1 L^2 T^-2].
Correct Answer:
A
— Energy
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Q. Which of the following quantities is a scalar?
A.
Velocity
B.
Force
C.
Acceleration
D.
Temperature
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Solution
Temperature is a scalar quantity as it has magnitude but no direction, while velocity, force, and acceleration are vector quantities.
Correct Answer:
D
— Temperature
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Q. Which of the following quantities is conserved in a closed system of rotating bodies?
A.
Linear momentum
B.
Angular momentum
C.
Kinetic energy
D.
All of the above
Show solution
Solution
In a closed system, angular momentum is conserved, while linear momentum and kinetic energy may not be.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is conserved in a closed system with no external torques?
A.
Linear momentum
B.
Angular momentum
C.
Energy
D.
All of the above
Show solution
Solution
In a closed system with no external torques, angular momentum is conserved.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is conserved in a closed system with no external torques acting on it?
A.
Angular momentum
B.
Linear momentum
C.
Energy
D.
All of the above
Show solution
Solution
In a closed system with no external torques, angular momentum is conserved.
Correct Answer:
A
— Angular momentum
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Q. Which of the following quantities is conserved in an isolated system when no external torques act?
A.
Linear momentum
B.
Angular momentum
C.
Both linear and angular momentum
D.
Neither
Show solution
Solution
In an isolated system with no external torques, angular momentum is conserved.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is conserved in the absence of external torques?
A.
Linear momentum
B.
Angular momentum
C.
Energy
D.
All of the above
Show solution
Solution
In the absence of external torques, angular momentum is conserved.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is dimensionally consistent with energy?
A.
Force x Distance
B.
Mass x Acceleration
C.
Pressure x Volume
D.
All of the above
Show solution
Solution
All the options are dimensionally consistent with energy, as they can be expressed in terms of [M^1 L^2 T^-2].
Correct Answer:
D
— All of the above
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Q. Which of the following quantities is dimensionless?
A.
Reynolds number
B.
Force
C.
Energy
D.
Pressure
Show solution
Solution
Reynolds number is dimensionless as it is a ratio of inertial forces to viscous forces.
Correct Answer:
A
— Reynolds number
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Q. Which of the following quantities is measured in Joules?
A.
Work
B.
Power
C.
Energy
D.
Both Work and Energy
Show solution
Solution
Both work and energy are measured in Joules (J) in the SI system.
Correct Answer:
D
— Both Work and Energy
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Q. Which of the following quantum numbers can have a negative value?
Show solution
Solution
The magnetic quantum number (m_l) can take negative values, ranging from -l to +l.
Correct Answer:
C
— m_l
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Q. Which of the following quantum numbers can have a value of 0?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The azimuthal quantum number (l) can have a value of 0, which corresponds to an s orbital.
Correct Answer:
B
— Azimuthal quantum number
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Q. Which of the following quantum numbers can never be negative?
Show solution
Solution
The principal quantum number n can never be negative; it starts from 1.
Correct Answer:
A
— n
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Q. Which of the following quantum numbers cannot be negative?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m_l)
D.
Spin quantum number (m_s)
Show solution
Solution
The principal quantum number (n) is always a positive integer (1, 2, 3, ...).
Correct Answer:
A
— Principal quantum number (n)
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Q. Which of the following quantum numbers cannot be the same for two electrons in the same atom?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
According to the Pauli Exclusion Principle, no two electrons in an atom can have the same set of all four quantum numbers.
Correct Answer:
D
— Spin quantum number
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