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 common preservative used in food?
A.
Sodium chloride
B.
Sodium benzoate
C.
Sucrose
D.
Vinegar
Show solution
Solution
Sodium benzoate is commonly used as a preservative to inhibit the growth of bacteria and fungi.
Correct Answer:
B
— Sodium benzoate
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Q. Which of the following is a common property of group 14 elements?
A.
They are all gases
B.
They can form multiple oxidation states
C.
They are all nonmetals
D.
They have low melting points
Show solution
Solution
Group 14 elements can exhibit multiple oxidation states, such as +4 and +2.
Correct Answer:
B
— They can form multiple oxidation states
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Q. Which of the following is a common test for the presence of aromatic compounds?
A.
Bromine water test
B.
Baeyer test
C.
Tollen's test
D.
Benzene test
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Solution
The bromine water test can be used to detect unsaturation; however, aromatic compounds do not react with bromine water, indicating their stability.
Correct Answer:
A
— Bromine water test
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Q. Which of the following is a common use of aspirin in everyday life?
A.
Pain relief
B.
Antibiotic
C.
Antidepressant
D.
Antihistamine
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Solution
Aspirin is widely used for pain relief due to its analgesic properties.
Correct Answer:
A
— Pain relief
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Q. Which of the following is a common use of aspirin?
A.
Pain relief
B.
Antibiotic
C.
Antidepressant
D.
Antihistamine
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Solution
Aspirin is commonly used for pain relief and to reduce inflammation.
Correct Answer:
A
— Pain relief
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Q. Which of the following is a common use of chlorine in everyday life?
A.
Disinfecting water
B.
Flavoring food
C.
Coloring hair
D.
Preserving meat
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Solution
Chlorine is commonly used to disinfect drinking water, making it safe for consumption.
Correct Answer:
A
— Disinfecting water
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Q. Which of the following is a common use of ethanol in everyday life?
A.
Fuel
B.
Antiseptic
C.
Solvent
D.
All of the above
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Solution
Ethanol is used as a fuel, antiseptic, and solvent, making it versatile in everyday applications.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of ethanol?
A.
Fuel
B.
Antiseptic
C.
Solvent
D.
All of the above
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Solution
Ethanol is widely used as a fuel, antiseptic, and solvent, making it versatile in everyday applications.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of hydrogen peroxide in households?
A.
Disinfectant
B.
Bleach
C.
Antiseptic
D.
All of the above
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Solution
Hydrogen peroxide is used as a disinfectant, bleach, and antiseptic in various household applications.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of hydrogen peroxide?
A.
Disinfectant
B.
Bleach
C.
Antiseptic
D.
All of the above
Show solution
Solution
Hydrogen peroxide is used as a disinfectant, bleach, and antiseptic.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of polyethylene?
A.
Insulation for wires
B.
Packaging materials
C.
Automobile parts
D.
Textiles
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Solution
Polyethylene is widely used in packaging materials due to its flexibility and durability.
Correct Answer:
B
— Packaging materials
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Q. Which of the following is a common use of polyvinyl chloride (PVC)?
A.
Food packaging
B.
Electrical insulation
C.
Clothing
D.
Automobile tires
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Solution
Polyvinyl chloride (PVC) is commonly used in electrical insulation and construction materials.
Correct Answer:
B
— Electrical insulation
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Q. Which of the following is a common use of silicon?
A.
Fertilizers
B.
Semiconductors
C.
Explosives
D.
Dyes
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Solution
Silicon is widely used in semiconductors.
Correct Answer:
B
— Semiconductors
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Q. Which of the following is a common use of sodium bicarbonate in everyday life?
A.
Baking
B.
Cleaning
C.
Pest control
D.
All of the above
Show solution
Solution
Sodium bicarbonate, or baking soda, is used in baking, cleaning, and even pest control.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of vinegar in households?
A.
Cleaning agent
B.
Food preservative
C.
Flavoring agent
D.
All of the above
Show solution
Solution
Vinegar is used in households for cleaning, preserving food, and as a flavoring agent.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of vinegar?
A.
Preservative
B.
Cleaning agent
C.
Flavoring agent
D.
All of the above
Show solution
Solution
Vinegar is used as a preservative, cleaning agent, and flavoring agent.
Correct Answer:
D
— All of the above
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Q. Which of the following is a component of nucleotides?
A.
Fatty acids
B.
Amino acids
C.
Nitrogenous bases
D.
Monosaccharides
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Solution
Nucleotides are made up of a nitrogenous base, a sugar, and a phosphate group.
Correct Answer:
C
— Nitrogenous bases
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Q. Which of the following is a compound of hydrogen and carbon?
A.
H2O
B.
CH4
C.
NaH
D.
HCl
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Solution
Methane (CH4) is a compound of hydrogen and carbon.
Correct Answer:
B
— CH4
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Q. Which of the following is a consequence of acid rain?
A.
Soil degradation
B.
Increased biodiversity
C.
Improved crop yield
D.
None of the above
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Solution
Acid rain leads to soil degradation, harming plant life and reducing biodiversity.
Correct Answer:
A
— Soil degradation
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Q. Which of the following is a consequence of eutrophication in water bodies?
A.
Increased biodiversity
B.
Decreased oxygen levels
C.
Improved water clarity
D.
Reduced algal growth
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Solution
Eutrophication leads to increased nutrient levels, resulting in algal blooms that decrease oxygen levels in water bodies.
Correct Answer:
B
— Decreased oxygen levels
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Q. Which of the following is a consequence of eutrophication?
A.
Increased biodiversity
B.
Decreased oxygen levels
C.
Improved water clarity
D.
Reduction of algal blooms
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Solution
Eutrophication leads to decreased oxygen levels in water bodies, which can harm aquatic life.
Correct Answer:
B
— Decreased oxygen levels
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Q. Which of the following is a consequence of global warming?
A.
Rising sea levels
B.
Increased ice cover
C.
Decreased temperatures
D.
None of the above
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Solution
Global warming leads to rising sea levels due to the melting of polar ice and glaciers.
Correct Answer:
A
— Rising sea levels
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Q. Which of the following is a consequence of Lenz's law?
A.
Induced current opposes the change in magnetic flux
B.
Induced current enhances the change in magnetic flux
C.
Induced current is always zero
D.
Induced current is independent of magnetic field
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Solution
Lenz's law states that the direction of induced current is such that it opposes the change in magnetic flux.
Correct Answer:
A
— Induced current opposes the change in magnetic flux
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Q. Which of the following is a consequence of Newton's law of gravitation?
A.
The orbits of planets are elliptical
B.
Masses repel each other
C.
Gravitational force is a vector quantity
D.
All objects fall at the same rate in a vacuum
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Solution
Newton's law of gravitation leads to the conclusion that the orbits of planets are elliptical, as described by Kepler's laws.
Correct Answer:
A
— The orbits of planets are elliptical
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Q. Which of the following is a consequence of Raoult's Law in a binary solution?
A.
The total vapor pressure is the sum of the partial pressures.
B.
The total vapor pressure is always lower than the vapor pressure of the pure solvent.
C.
The mole fraction of the solute is always greater than that of the solvent.
D.
The boiling point of the solution is always higher than that of the pure solvent.
Show solution
Solution
According to Raoult's Law, the total vapor pressure of a binary solution is the sum of the partial pressures of each component.
Correct Answer:
A
— The total vapor pressure is the sum of the partial pressures.
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Q. Which of the following is a consequence of the law of universal gravitation?
A.
The orbits of planets are elliptical
B.
All objects fall at the same rate in a vacuum
C.
Gravity is a contact force
D.
Mass does not affect gravitational attraction
Show solution
Solution
The law of universal gravitation leads to the conclusion that the orbits of planets are elliptical, as described by Kepler's laws.
Correct Answer:
A
— The orbits of planets are elliptical
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Q. Which of the following is a correct application of Ampere's Law?
A.
Calculating electric field in a capacitor
B.
Finding the magnetic field in a toroid
C.
Determining the potential difference across a resistor
D.
Calculating the energy stored in an inductor
Show solution
Solution
Ampere's Law is used to find the magnetic field in a toroid, where the symmetry allows for straightforward application of the law.
Correct Answer:
B
— Finding the magnetic field in a toroid
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Q. Which of the following is a correct application of Raoult's Law?
A.
Calculating the boiling point elevation
B.
Determining the freezing point depression
C.
Finding the vapor pressure of a solution
D.
Measuring the solubility of a gas in a liquid
Show solution
Solution
Raoult's Law is used to find the vapor pressure of a solution based on the vapor pressures of its components.
Correct Answer:
C
— Finding the vapor pressure of a solution
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Q. Which of the following is a correct expression for Gibbs Free Energy?
A.
ΔG = ΔH + TΔS
B.
ΔG = ΔH - TΔS
C.
ΔG = TΔS - ΔH
D.
ΔG = ΔS - ΔH
Show solution
Solution
The correct expression for Gibbs Free Energy is ΔG = ΔH - TΔS.
Correct Answer:
B
— ΔG = ΔH - TΔS
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Q. Which of the following is a correct representation of significant figures?
A.
0.00450
B.
4500
C.
0.0450
D.
4500.0
Show solution
Solution
0.00450 has 3 significant figures due to the trailing zero after the 5.
Correct Answer:
A
— 0.00450
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