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. For a solenoid of length L, radius R, and carrying current I, what is the magnetic field inside the solenoid?
  • A. μ₀nI
  • B. μ₀I/L
  • C. μ₀I/2L
  • D. μ₀I/4L
Q. For a solid disk of mass M and radius R, what is the moment of inertia about an axis perpendicular to the disk and passing through its center?
  • A. 1/2 MR^2
  • B. 1/4 MR^2
  • C. MR^2
  • D. 3/4 MR^2
Q. For a solid disk of mass M and radius R, what is the moment of inertia about an axis through its center and perpendicular to its plane?
  • A. 1/2 MR^2
  • B. 1/4 MR^2
  • C. MR^2
  • D. 3/4 MR^2
Q. For a solution containing 2 components A and B, if the mole fraction of A is 0.6, what is the vapor pressure of the solution if the vapor pressure of pure A is 100 mmHg?
  • A. 60 mmHg
  • B. 100 mmHg
  • C. 40 mmHg
  • D. 80 mmHg
Q. For a solution to obey Raoult's Law, the interactions between solute and solvent must be:
  • A. Stronger than those in the pure components.
  • B. Weaker than those in the pure components.
  • C. Similar to those in the pure components.
  • D. Non-existent.
Q. For a spherical Gaussian surface of radius R enclosing a charge Q, what is the electric field at a distance 2R from the center?
  • A. Q/4πε₀(2R)²
  • B. Q/4πε₀R²
  • C. Q/4πε₀(2R)³
  • D. 0
Q. For a spontaneous process, the change in entropy of the universe must be:
  • A. Zero
  • B. Positive
  • C. Negative
  • D. Undefined
Q. For a spontaneous process, the change in Gibbs free energy (ΔG) is related to entropy (ΔS) by which of the following equations?
  • A. ΔG = ΔH + TΔS
  • B. ΔG = ΔH - TΔS
  • C. ΔG = TΔS - ΔH
  • D. ΔG = ΔS - ΔH
Q. For a spontaneous process, the change in Gibbs free energy (ΔG) is related to entropy (ΔS) how?
  • A. ΔG = ΔH - TΔS
  • B. ΔG = TΔS - ΔH
  • C. ΔG = ΔS - ΔH
  • D. ΔG = ΔH + TΔS
Q. For a spontaneous process, the change in Gibbs free energy (ΔG) is:
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Undefined
Q. For a system of particles, how is the moment of inertia calculated?
  • A. Sum of individual moments
  • B. Product of mass and distance squared
  • C. Sum of mass times distance squared
  • D. Average of all moments
Q. For a system of particles, the moment of inertia is calculated as the sum of the products of mass and the square of the distance from the axis of rotation. This is known as:
  • A. Parallel Axis Theorem
  • B. Perpendicular Axis Theorem
  • C. Rotational Dynamics
  • D. Angular Momentum
Q. For a system of particles, the moment of inertia is calculated by summing which of the following?
  • A. Masses only
  • B. Distances only
  • C. Mass times distance squared
  • D. Mass times distance
Q. For a system of particles, the total moment of inertia is calculated by which of the following methods?
  • A. Adding individual moments of inertia
  • B. Multiplying total mass by average distance
  • C. Using the parallel axis theorem
  • D. Using the perpendicular axis theorem
Q. For a system of particles, the total moment of inertia is calculated by which of the following?
  • A. Sum of individual moments
  • B. Product of mass and distance
  • C. Sum of mass times distance squared
  • D. Average of individual moments
Q. For a thin circular ring of mass M and radius R, what is the moment of inertia about an axis perpendicular to its plane through its center?
  • A. MR^2
  • B. 1/2 MR^2
  • C. 2/3 MR^2
  • D. 1/3 MR^2
Q. For a toroidal solenoid with N turns and radius R carrying current I, what is the magnetic field inside the toroid?
  • A. μ₀NI/2πR
  • B. μ₀NI/R
  • C. μ₀NI/4πR
  • D. μ₀NI/2R
Q. For a uniformly charged sphere of radius R and total charge Q, what is the electric field at a distance r from the center where r > R?
  • A. Q/(4πε₀r²)
  • B. 0
  • C. Q/(4πε₀R²)
  • D. Q/(4πε₀r)
Q. For a zero-order reaction, how does the rate change with concentration?
  • A. Increases linearly
  • B. Decreases linearly
  • C. Remains constant
  • D. Increases exponentially
Q. For a zero-order reaction, how does the rate change with respect to concentration?
  • A. Increases linearly
  • B. Decreases linearly
  • C. Remains constant
  • D. Increases exponentially
Q. For an electron in a 3d orbital, what are the possible values of l?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. For an electron in a 3d orbital, what are the possible values of m_l?
  • A. -2, -1, 0, 1, 2
  • B. -1, 0, 1
  • C. 0, 1
  • D. 0, 1, 2
Q. For an electron in a 3p orbital, what are the possible values of m_l?
  • A. -1, 0, +1
  • B. 0, +1, +2
  • C. -2, -1, 0
  • D. 0, -1, -2
Q. For an electron in a 3p orbital, what are the possible values of m_s?
  • A. -1/2, +1/2
  • B. 0, +1
  • C. 1, 2
  • D. -1, 0, +1
Q. For an electron in a 3p orbital, what are the possible values of the magnetic quantum number (m_l)?
  • A. -1, 0, +1
  • B. 0, +1, +2
  • C. -2, -1, 0
  • D. 1, 2, 3
Q. For an electron in a 5d orbital, what are the possible values of m_l?
  • A. -2, -1, 0, 1, 2
  • B. -3, -2, -1, 0, 1, 2, 3
  • C. 0, 1, 2
  • D. -1, 0, 1
Q. For an ideal gas, if the temperature is increased, what happens to the RMS speed?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the gas
Q. For an ideal gas, if the volume is halved while keeping the temperature constant, what happens to the pressure?
  • A. It remains the same
  • B. It doubles
  • C. It halves
  • D. It quadruples
Q. For an ideal gas, the equation of state is given by:
  • A. PV = nRT
  • B. PV = NkT
  • C. PV = mRT
  • D. PV = kT
Q. For an ideal gas, which equation relates pressure, volume, and temperature?
  • A. PV = nRT
  • B. PV = nR
  • C. PV = RT
  • D. PV = nT
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