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 is the term for the temperature at which a liquid turns into vapor?
A.
Melting point
B.
Boiling point
C.
Freezing point
D.
Sublimation point
Show solution
Solution
The boiling point is the temperature at which a liquid turns into vapor.
Correct Answer:
B
— Boiling point
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Q. What is the term for the temperature at which a liquid's vapor pressure equals the external pressure?
A.
Melting point
B.
Freezing point
C.
Boiling point
D.
Critical point
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Solution
The boiling point is defined as the temperature at which a liquid's vapor pressure equals the external pressure.
Correct Answer:
C
— Boiling point
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Q. What is the term for the temperature at which a solid becomes a liquid?
A.
Boiling point
B.
Melting point
C.
Freezing point
D.
Sublimation point
Show solution
Solution
The melting point is the temperature at which a solid becomes a liquid.
Correct Answer:
B
— Melting point
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Q. What is the term for the transfer of heat through electromagnetic waves?
A.
Conduction
B.
Convection
C.
Radiation
D.
Conduction and Convection
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Solution
Radiation is the transfer of heat through electromagnetic waves, such as infrared radiation.
Correct Answer:
C
— Radiation
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Q. What is the term for the transition from a gas to a liquid?
A.
Sublimation
B.
Condensation
C.
Evaporation
D.
Freezing
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Solution
The transition from a gas to a liquid is called condensation.
Correct Answer:
B
— Condensation
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Q. What is the term for the transition from a solid directly to a gas?
A.
Melting
B.
Sublimation
C.
Condensation
D.
Evaporation
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Solution
Sublimation is the process where a solid transitions directly to a gas without becoming a liquid.
Correct Answer:
B
— Sublimation
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Q. What is the term for the transition from liquid to gas at temperatures below the boiling point?
A.
Evaporation
B.
Condensation
C.
Sublimation
D.
Freezing
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Solution
Evaporation is the process of a liquid turning into gas below its boiling point.
Correct Answer:
A
— Evaporation
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Q. What is the term for the transition from liquid to gas?
A.
Condensation
B.
Evaporation
C.
Sublimation
D.
Freezing
Show solution
Solution
Evaporation is the process where liquid turns into gas.
Correct Answer:
B
— Evaporation
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Q. What is the term for the transition from solid to gas without passing through the liquid state?
A.
Sublimation
B.
Deposition
C.
Evaporation
D.
Condensation
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Solution
Sublimation is the process where a solid turns directly into a gas.
Correct Answer:
A
— Sublimation
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Q. What is the term for the upward force exerted by a fluid on an object submerged in it?
A.
Buoyancy
B.
Weight
C.
Pressure
D.
Density
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Solution
The upward force exerted by a fluid on a submerged object is known as buoyancy.
Correct Answer:
A
— Buoyancy
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Q. What is the term for the upward force experienced by an object submerged in a fluid?
A.
Buoyancy
B.
Weight
C.
Pressure
D.
Density
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Solution
The upward force experienced by an object submerged in a fluid is known as buoyancy.
Correct Answer:
A
— Buoyancy
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Q. What is the term independent of x in the expansion of (3x - 4)^7?
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Solution
The term independent of x occurs when k = 7, C(7, 3) * (3)^3 * (-4)^4 = 35 * 27 * 256 = 84.
Correct Answer:
C
— 84
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Q. What is the term used for the amount of solute that can be adsorbed per unit mass of adsorbent?
A.
Adsorption isotherm
B.
Adsorption capacity
C.
Adsorption efficiency
D.
Adsorption rate
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Solution
The term 'adsorption capacity' refers to the amount of solute that can be adsorbed per unit mass of adsorbent.
Correct Answer:
B
— Adsorption capacity
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Q. What is the theoretical yield of Na2SO4 when 10 g of Na reacts with excess sulfuric acid?
A.
20 g
B.
30 g
C.
40 g
D.
50 g
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Solution
10 g of Na = 0.434 moles. 2Na + H2SO4 → Na2SO4 + H2. 0.434 moles of Na2SO4 = 0.434 * 142 g = 61.6 g.
Correct Answer:
B
— 30 g
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Q. What is the theoretical yield of NaCl when 23 g of Na reacts with Cl2?
A.
58.5 g
B.
23 g
C.
46 g
D.
69 g
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Solution
23 g of Na = 1 mole. 1 mole of Na produces 1 mole of NaCl = 58.5 g.
Correct Answer:
A
— 58.5 g
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Q. What is the theoretical yield of NaCl when 23 g of Na reacts with excess Cl2?
A.
58.5 g
B.
23 g
C.
46 g
D.
11.5 g
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Solution
23 g of Na = 1 mole. 1 mole of Na produces 1 mole of NaCl = 58.5 g.
Correct Answer:
A
— 58.5 g
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Q. What is the threshold frequency for a metal if the work function is 4.5 eV?
A.
5.4 x 10^14 Hz
B.
6.0 x 10^14 Hz
C.
7.2 x 10^14 Hz
D.
8.0 x 10^14 Hz
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Solution
Threshold frequency (ν₀) = Work function (Φ) / h = 4.5 eV / (4.14 x 10^-15 eV·s) = 5.4 x 10^14 Hz.
Correct Answer:
A
— 5.4 x 10^14 Hz
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Q. What is the threshold of hearing in terms of sound intensity level?
A.
0 dB
B.
10 dB
C.
20 dB
D.
30 dB
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Solution
The threshold of hearing is defined as 0 dB, which corresponds to the faintest sound that can be heard by the average human ear.
Correct Answer:
A
— 0 dB
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Q. What is the time period of a damped oscillator with a damping ratio of 0.1 and a natural frequency of 10 rad/s?
A.
0.2 s
B.
0.3 s
C.
0.4 s
D.
0.5 s
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Solution
Time period (T) = 2π/ω_n = 2π/10 = 0.2π ≈ 0.628 s.
Correct Answer:
C
— 0.4 s
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Q. What is the time period of a damped oscillator with a natural frequency of 3 rad/s and a damping ratio of 0.1?
A.
2π/3
B.
2π/3.1
C.
2π/3.2
D.
2π/3.3
Show solution
Solution
Time period (T) = 2π/ω_n = 2π/3 rad/s = 2π/3.
Correct Answer:
A
— 2π/3
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Q. What is the time period of a simple pendulum of length L?
A.
2π√(L/g)
B.
2π√(g/L)
C.
g/2π√L
D.
L/2π√g
Show solution
Solution
The time period T of a simple pendulum is given by T = 2π√(L/g), where L is the length of the pendulum and g is the acceleration due to gravity.
Correct Answer:
A
— 2π√(L/g)
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Q. What is the torque about a pivot if a force of 12 N is applied at a distance of 0.25 m at an angle of 90 degrees?
A.
3 Nm
B.
6 Nm
C.
12 Nm
D.
24 Nm
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Solution
Torque = Force × Distance = 12 N × 0.25 m = 3 Nm.
Correct Answer:
C
— 12 Nm
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Q. What is the torque about a pivot if a force of 8 N is applied perpendicular to a lever arm of 0.75 m?
A.
4 Nm
B.
6 Nm
C.
8 Nm
D.
10 Nm
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Solution
Torque = Force × Distance = 8 N × 0.75 m = 6 Nm.
Correct Answer:
C
— 8 Nm
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Q. What is the torque produced by a 60 N force acting at a distance of 0.75 m from the pivot point?
A.
45 Nm
B.
60 Nm
C.
75 Nm
D.
90 Nm
Show solution
Solution
Torque = Force × Distance = 60 N × 0.75 m = 45 Nm.
Correct Answer:
A
— 45 Nm
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Q. What is the torque produced by a 60 N force applied at a distance of 0.75 m from the pivot point?
A.
45 Nm
B.
60 Nm
C.
75 Nm
D.
90 Nm
Show solution
Solution
Torque = Force × Distance = 60 N × 0.75 m = 45 Nm.
Correct Answer:
A
— 45 Nm
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Q. What is the torque produced by a force of 10 N applied at a distance of 2 m from the pivot point, perpendicular to the lever arm?
A.
5 Nm
B.
10 Nm
C.
20 Nm
D.
15 Nm
Show solution
Solution
Torque (τ) = Force (F) × Distance (r) = 10 N × 2 m = 20 Nm.
Correct Answer:
C
— 20 Nm
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Q. What is the torque produced by a force of 15 N acting at an angle of 90 degrees to the lever arm of 0.5 m?
A.
0 Nm
B.
7.5 Nm
C.
15 Nm
D.
30 Nm
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Solution
Torque = Force × Distance × sin(θ) = 15 N × 0.5 m × sin(90°) = 15 Nm.
Correct Answer:
C
— 15 Nm
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Q. What is the torque produced by a force of 25 N acting at an angle of 90 degrees to the lever arm of 0.5 m?
A.
12.5 Nm
B.
25 Nm
C.
50 Nm
D.
0 Nm
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Solution
Torque = Force × Distance × sin(90°) = 25 N × 0.5 m × 1 = 12.5 Nm.
Correct Answer:
B
— 25 Nm
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Q. What is the total current flowing through a circuit if the total voltage is 12 V and the total resistance is 4 ohms?
A.
3 A
B.
4 A
C.
12 A
D.
48 A
Show solution
Solution
Using Ohm's Law, I = V / R. Here, I = 12 V / 4 ohms = 3 A.
Correct Answer:
A
— 3 A
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Q. What is the total current flowing through a circuit if the total voltage is 12V and the total resistance is 4Ω?
Show solution
Solution
Using Ohm's Law (I = V/R), the current is I = 12V / 4Ω = 3A.
Correct Answer:
B
— 3A
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