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 property of hydrogen gas?
A.
It is a good conductor of electricity
B.
It is colorless and odorless
C.
It is denser than air
D.
It supports combustion
Show solution
Solution
Hydrogen gas is colorless and odorless.
Correct Answer:
B
— It is colorless and odorless
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Q. Which of the following is a property of hydrogen?
A.
It is a metal
B.
It is a non-metal
C.
It is a noble gas
D.
It is a liquid at room temperature
Show solution
Solution
Hydrogen is classified as a non-metal.
Correct Answer:
B
— It is a non-metal
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Q. Which of the following is a property of ionic compounds?
A.
They have low melting points.
B.
They conduct electricity in solid state.
C.
They are soluble in water.
D.
They are malleable.
Show solution
Solution
Ionic compounds are generally soluble in water due to the strong interactions between ions and water molecules.
Correct Answer:
C
— They are soluble in water.
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Q. Which of the following is a property of lanthanide contraction?
A.
Increase in atomic size
B.
Decrease in ionization energy
C.
Increase in electronegativity
D.
Decrease in atomic radius
Show solution
Solution
Lanthanide contraction refers to the decrease in atomic radius across the lanthanide series due to poor shielding of f-electrons.
Correct Answer:
D
— Decrease in atomic radius
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Q. Which of the following is a property of lanthanides?
A.
High density
B.
Low melting point
C.
Non-magnetic
D.
Colorless
Show solution
Solution
Lanthanides are known for their high density and are typically metallic in nature.
Correct Answer:
A
— High density
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Q. Which of the following is a property of metals?
A.
Brittle
B.
Good conductors of heat
C.
Poor conductors of electricity
D.
Dull appearance
Show solution
Solution
Metals are typically good conductors of heat and electricity and have a shiny appearance.
Correct Answer:
B
— Good conductors of heat
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Q. Which of the following is a property of noble gases?
A.
Highly reactive
B.
Colorless and odorless
C.
Form strong acids
D.
Good conductors of electricity
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Solution
Noble gases are colorless and odorless under standard conditions.
Correct Answer:
B
— Colorless and odorless
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Q. Which of the following is a property of p-block metals?
A.
High density
B.
Low melting point
C.
Good electrical conductivity
D.
Brittle
Show solution
Solution
P-block metals, such as Lead and Tin, are generally brittle.
Correct Answer:
D
— Brittle
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Q. Which of the following is a property of the p-block element carbon?
A.
Good conductor of electricity
B.
Forms strong ionic bonds
C.
Can form multiple bonds
D.
High density
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Solution
Carbon can form multiple bonds, such as double and triple bonds, due to its tetravalency.
Correct Answer:
C
— Can form multiple bonds
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Q. Which of the following is a property of transition metals?
A.
They have completely filled d-orbitals
B.
They form only ionic compounds
C.
They exhibit variable oxidation states
D.
They are all paramagnetic
Show solution
Solution
Transition metals exhibit variable oxidation states due to the involvement of d-electrons in bonding.
Correct Answer:
C
— They exhibit variable oxidation states
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Q. Which of the following is a purely imaginary number?
A.
2 + 3i
B.
0
C.
4
D.
0 + 5i
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Solution
A purely imaginary number has no real part, so 0 + 5i is purely imaginary.
Correct Answer:
D
— 0 + 5i
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Q. Which of the following is a reducing agent for aldehydes?
A.
H2
B.
KMnO4
C.
Na2Cr2O7
D.
HCl
Show solution
Solution
Hydrogen gas (H2) can act as a reducing agent for aldehydes, converting them to alcohols.
Correct Answer:
A
— H2
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Q. Which of the following is a reducing agent in the reaction 2CuO + C → 2Cu + CO2?
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Solution
C is the reducing agent as it donates electrons to reduce CuO to Cu.
Correct Answer:
B
— C
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Q. Which of the following is a reducing agent that can reduce ketones?
A.
H2/Pd
B.
KMnO4
C.
Na2Cr2O7
D.
AgNO3
Show solution
Solution
H2 in the presence of palladium (Pd) is a reducing agent that can reduce ketones to alcohols.
Correct Answer:
A
— H2/Pd
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Q. Which of the following is a reducing sugar?
A.
Fructose
B.
Sucrose
C.
Starch
D.
Cellulose
Show solution
Solution
Fructose is a reducing sugar, while sucrose, starch, and cellulose are not.
Correct Answer:
A
— Fructose
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Q. Which of the following is a renewable energy source?
A.
Coal
B.
Natural Gas
C.
Solar Energy
D.
Nuclear Energy
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Solution
Solar energy is a renewable energy source that can be harnessed without depleting natural resources.
Correct Answer:
C
— Solar Energy
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Q. Which of the following is a renewable source of energy that helps reduce environmental pollution?
A.
Coal
B.
Natural gas
C.
Solar energy
D.
Nuclear energy
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Solution
Solar energy is a renewable source of energy that helps reduce environmental pollution compared to fossil fuels.
Correct Answer:
C
— Solar energy
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Q. Which of the following is a renewable source of energy?
A.
Coal
B.
Natural gas
C.
Solar energy
D.
Nuclear energy
Show solution
Solution
Solar energy is a renewable source of energy that can be harnessed without depleting natural resources.
Correct Answer:
C
— Solar energy
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Q. Which of the following is a root of the equation z^2 + 1 = 0?
Show solution
Solution
The roots are z = ±i.
Correct Answer:
A
— i
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Q. Which of the following is a scalar quantity?
A.
Velocity
B.
Force
C.
Acceleration
D.
Temperature
Show solution
Solution
Temperature is a scalar quantity as it has magnitude but no direction.
Correct Answer:
D
— Temperature
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Q. Which of the following is a secondary alcohol?
A.
2-pentanol
B.
1-pentanol
C.
3-pentanol
D.
Cyclopentanol
Show solution
Solution
2-pentanol has the hydroxyl group on the second carbon, making it a secondary alcohol.
Correct Answer:
A
— 2-pentanol
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Q. Which of the following is a secondary amine?
A.
Ethylamine
B.
Dimethylamine
C.
Methylamine
D.
Aniline
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Solution
Dimethylamine is a secondary amine as it has two alkyl groups attached to the nitrogen.
Correct Answer:
B
— Dimethylamine
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Q. Which of the following is a side effect of excessive caffeine consumption?
A.
Drowsiness
B.
Increased alertness
C.
Insomnia
D.
Weight gain
Show solution
Solution
Excessive caffeine can lead to insomnia and disrupt sleep patterns.
Correct Answer:
C
— Insomnia
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Q. Which of the following is a state function?
A.
Work
B.
Heat
C.
Enthalpy
D.
All of the above
Show solution
Solution
Enthalpy is a state function, while work and heat are not state functions as they depend on the path taken.
Correct Answer:
C
— Enthalpy
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Q. Which of the following is a storage form of glucose in animals?
A.
Starch
B.
Cellulose
C.
Glycogen
D.
Chitin
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Solution
Glycogen is the storage form of glucose in animals, while starch serves this role in plants.
Correct Answer:
C
— Glycogen
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Q. Which of the following is a strong +I effect group?
A.
-F
B.
-Cl
C.
-Br
D.
-CH3
Show solution
Solution
The -CH3 group is a strong +I effect group as it donates electron density through the inductive effect.
Correct Answer:
D
— -CH3
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Q. Which of the following is a strong -M group?
A.
-OCH3
B.
-NO2
C.
-CH3
D.
-F
Show solution
Solution
-NO2 is a strong -M group as it withdraws electron density through resonance.
Correct Answer:
B
— -NO2
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Q. Which of the following is a strong acid?
A.
HCl
B.
CH3COOH
C.
H2CO3
D.
NH3
Show solution
Solution
HCl (hydrochloric acid) is a strong acid that completely dissociates in water.
Correct Answer:
A
— HCl
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Q. Which of the following is a strong base?
A.
NH4OH
B.
NaOH
C.
CH3COONa
D.
K2CO3
Show solution
Solution
NaOH (sodium hydroxide) is a strong base that completely dissociates in solution.
Correct Answer:
B
— NaOH
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Q. Which of the following is a strong nucleophile?
A.
Water
B.
Ammonia
C.
Sodium chloride
D.
Hydrochloric acid
Show solution
Solution
Ammonia (NH3) is a strong nucleophile due to the presence of a lone pair of electrons on the nitrogen atom.
Correct Answer:
B
— Ammonia
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