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 represents a family of curves for the equation y = ax^2 + bx + c?
A.
Linear functions
B.
Quadratic functions
C.
Cubic functions
D.
Exponential functions
Show solution
Solution
The equation y = ax^2 + bx + c represents a family of quadratic functions where 'a', 'b', and 'c' are constants.
Correct Answer:
B
— Quadratic functions
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Q. Which of the following represents a family of exponential curves?
A.
y = ae^(bx)
B.
y = ax^2 + bx + c
C.
y = a sin(bx)
D.
y = a log(bx)
Show solution
Solution
The equation y = ae^(bx) represents a family of exponential curves where a and b are constants.
Correct Answer:
A
— y = ae^(bx)
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Q. Which of the following represents a family of straight lines?
A.
y = mx + c
B.
y = ax^2 + bx + c
C.
y = e^x
D.
y = sin(x)
Show solution
Solution
The equation y = mx + c represents a family of straight lines for different values of m and c.
Correct Answer:
A
— y = mx + c
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Q. Which of the following represents a hyperbola with transverse axis along the x-axis?
A.
x^2/a^2 - y^2/b^2 = 1
B.
y^2/a^2 - x^2/b^2 = 1
C.
x^2/b^2 - y^2/a^2 = 1
D.
y^2/b^2 - x^2/a^2 = 1
Show solution
Solution
The equation x^2/a^2 - y^2/b^2 = 1 represents a hyperbola with transverse axis along the x-axis.
Correct Answer:
A
— x^2/a^2 - y^2/b^2 = 1
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Q. Which of the following represents a physical change?
A.
Burning wood
B.
Dissolving sugar in water
C.
Rusting of iron
D.
Cooking an egg
Show solution
Solution
Dissolving sugar in water is a physical change as it does not alter the chemical composition of sugar.
Correct Answer:
B
— Dissolving sugar in water
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Q. Which of the following represents an endothermic reaction?
A.
Combustion of gasoline
B.
Dissolving ammonium nitrate in water
C.
Respiration
D.
Rusting of iron
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Solution
Dissolving ammonium nitrate in water absorbs heat, making it an endothermic reaction.
Correct Answer:
B
— Dissolving ammonium nitrate in water
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Q. Which of the following represents the correct relationship between moles and mass?
A.
Moles = Mass / Molar Mass
B.
Mass = Moles x Molar Mass
C.
Molar Mass = Mass / Moles
D.
All of the above
Show solution
Solution
All the given relationships are correct and represent the conversion between moles, mass, and molar mass.
Correct Answer:
D
— All of the above
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Q. Which of the following represents the correct relationship between moles, mass, and molar mass?
A.
moles = mass × molar mass
B.
mass = moles × molar mass
C.
molar mass = mass / moles
D.
mass = moles / molar mass
Show solution
Solution
The correct relationship is mass = moles × molar mass.
Correct Answer:
B
— mass = moles × molar mass
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Q. Which of the following represents the enthalpy change for a reaction at constant pressure?
Show solution
Solution
The enthalpy change for a reaction at constant pressure is represented by ΔH.
Correct Answer:
B
— ΔH
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Q. Which of the following represents the number of particles in one mole of a substance?
A.
6.022 x 10^23
B.
3.14 x 10^22
C.
1.6 x 10^19
D.
9.11 x 10^28
Show solution
Solution
Avogadro's number is 6.022 x 10^23, which represents the number of particles in one mole.
Correct Answer:
A
— 6.022 x 10^23
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Q. Which of the following represents the solution to the inequality 4 - x < 1?
A.
x > 3
B.
x < 3
C.
x > 4
D.
x < 4
Show solution
Solution
4 - x < 1 => -x < -3 => x > 3
Correct Answer:
A
— x > 3
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Q. Which of the following represents the solution to the inequality 4 - x < 2?
A.
x < 2
B.
x > 2
C.
x < 4
D.
x > 4
Show solution
Solution
4 - x < 2 => -x < -2 => x > 2.
Correct Answer:
B
— x > 2
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Q. Which of the following represents the solution to the inequality 6x - 4 ≤ 2x + 8?
A.
x ≤ 3
B.
x ≥ 3
C.
x < 3
D.
x > 3
Show solution
Solution
6x - 4 ≤ 2x + 8 => 4x ≤ 12 => x ≤ 3.
Correct Answer:
B
— x ≥ 3
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Q. Which of the following represents the solution to the inequality 7x - 4 < 10?
A.
x < 2
B.
x > 2
C.
x < 3
D.
x > 3
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Solution
7x - 4 < 10 => 7x < 14 => x < 2.
Correct Answer:
C
— x < 3
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Q. Which of the following represents the solution to the inequality x/3 + 2 < 5?
A.
x < 9
B.
x > 9
C.
x < 6
D.
x > 6
Show solution
Solution
x/3 + 2 < 5 => x/3 < 3 => x < 9.
Correct Answer:
A
— x < 9
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Q. Which of the following represents the solution to the inequality x/3 - 2 < 1?
A.
x < 9
B.
x > 9
C.
x ≤ 9
D.
x ≥ 9
Show solution
Solution
x/3 - 2 < 1 => x/3 < 3 => x < 9.
Correct Answer:
A
— x < 9
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Q. Which of the following s-block elements has the highest melting point?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
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Solution
Lithium has the highest melting point among the alkali metals due to its small size and strong metallic bonding.
Correct Answer:
A
— Lithium
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Q. Which of the following s-block elements is a liquid at room temperature?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Mercury
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Solution
Mercury is a liquid at room temperature, but it is not an s-block element; however, among the options, it is the only liquid.
Correct Answer:
D
— Mercury
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Q. Which of the following s-block elements is essential for human health?
A.
Sodium
B.
Calcium
C.
Potassium
D.
All of the above
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Solution
Sodium, calcium, and potassium are all essential s-block elements for human health, playing vital roles in various physiological processes.
Correct Answer:
D
— All of the above
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Q. Which of the following s-block elements is known for forming a protective oxide layer?
A.
Sodium
B.
Potassium
C.
Calcium
D.
Magnesium
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Solution
Magnesium forms a protective oxide layer that prevents further oxidation.
Correct Answer:
D
— Magnesium
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Q. Which of the following s-block elements is known for its use in batteries?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Calcium
Show solution
Solution
Lithium is widely used in batteries, especially in rechargeable lithium-ion batteries.
Correct Answer:
A
— Lithium
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Q. Which of the following s-block elements is least reactive?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
Show solution
Solution
Lithium is the least reactive among the alkali metals.
Correct Answer:
A
— Lithium
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Q. Which of the following s-block elements is most reactive?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
Show solution
Solution
Rubidium is the most reactive among the s-block elements listed.
Correct Answer:
D
— Rubidium
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Q. Which of the following s-block elements is the least reactive?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
Show solution
Solution
Lithium is the least reactive among the alkali metals.
Correct Answer:
A
— Lithium
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Q. Which of the following s-block elements is used in fireworks for its bright red color?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Barium
Show solution
Solution
Lithium is used in fireworks to produce a bright red color.
Correct Answer:
A
— Lithium
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Q. Which of the following s-block elements is used in fireworks for producing a bright red color?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Calcium
Show solution
Solution
Lithium (Li) is used in fireworks to produce a bright red color.
Correct Answer:
A
— Lithium
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Q. Which of the following s-block elements is used in fireworks?
A.
Lithium
B.
Beryllium
C.
Sodium
D.
Magnesium
Show solution
Solution
Sodium is commonly used in fireworks for its bright yellow color.
Correct Answer:
C
— Sodium
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Q. Which of the following salts will produce a basic solution when dissolved in water?
A.
NaCl
B.
KNO3
C.
NH4Cl
D.
Na2CO3
Show solution
Solution
Na2CO3 is a salt of a weak acid (H2CO3) and a strong base (NaOH), thus it will produce a basic solution.
Correct Answer:
D
— Na2CO3
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Q. Which of the following sets is a power set of F = {1, 2}?
A.
{{1}, {2}}
B.
{{}, {1}, {2}, {1, 2}}
C.
{{1, 2}}
D.
{{1, 2}, {1}}
Show solution
Solution
The power set of F = {1, 2} is {{}, {1}, {2}, {1, 2}}.
Correct Answer:
B
— {{}, {1}, {2}, {1, 2}}
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Q. Which of the following sets is a power set of F = {a, b}?
A.
{∅, {a}, {b}}
B.
{∅, {a}, {b}, {a, b}}
C.
{a, b}
D.
{a, b, ∅}
Show solution
Solution
The power set of F = {a, b} is {∅, {a}, {b}, {a, b}}.
Correct Answer:
B
— {∅, {a}, {b}, {a, b}}
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