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 type of isomerism is exhibited by 1,2-dichloroethene?
A.
Structural isomerism
B.
Geometric isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
1,2-dichloroethene can exist in cis and trans forms, demonstrating geometric isomerism.
Correct Answer:
B
— Geometric isomerism
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Q. Which type of isomerism is exhibited by 1,3-butadiene?
A.
Geometric isomerism
B.
Structural isomerism
C.
Conformational isomerism
D.
Optical isomerism
Show solution
Solution
1,3-butadiene can exhibit geometric isomerism due to the presence of double bonds.
Correct Answer:
A
— Geometric isomerism
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Q. Which type of isomerism is exhibited by glucose and fructose?
A.
Geometric isomerism
B.
Structural isomerism
C.
Optical isomerism
D.
Conformational isomerism
Show solution
Solution
Glucose and fructose are structural isomers as they have the same molecular formula but different structures.
Correct Answer:
B
— Structural isomerism
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Q. Which type of isomerism is shown by butane (C4H10)?
A.
Geometric isomerism
B.
Structural isomerism
C.
Optical isomerism
D.
Tautomeric isomerism
Show solution
Solution
Butane exhibits structural isomerism as it can exist as n-butane and isobutane.
Correct Answer:
B
— Structural isomerism
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Q. Which type of lens is used to correct hyperopia (farsightedness)?
A.
Concave lens
B.
Convex lens
C.
Bifocal lens
D.
Cylindrical lens
Show solution
Solution
A convex lens is used to converge light rays for hyperopic correction.
Correct Answer:
B
— Convex lens
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Q. Which type of light is typically not polarized?
A.
Natural light
B.
Laser light
C.
Reflected light
D.
Light from a LED
Show solution
Solution
Natural light is typically unpolarized as it consists of waves vibrating in multiple planes.
Correct Answer:
A
— Natural light
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Q. Which type of noise is most commonly associated with communication systems?
A.
White noise
B.
Impulse noise
C.
Thermal noise
D.
Shot noise
Show solution
Solution
White noise is the most commonly associated noise in communication systems, affecting signal quality.
Correct Answer:
A
— White noise
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Q. Which type of orbit allows a satellite to cover the entire surface of the Earth over time?
A.
Geostationary orbit
B.
Polar orbit
C.
Circular orbit
D.
Elliptical orbit
Show solution
Solution
A polar orbit allows a satellite to pass over the entire surface of the Earth as the Earth rotates beneath it.
Correct Answer:
B
— Polar orbit
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Q. Which type of orbit allows a satellite to cover the entire surface of the Earth?
A.
Geostationary orbit
B.
Polar orbit
C.
Elliptical orbit
D.
Circular orbit
Show solution
Solution
A polar orbit allows a satellite to pass over the entire surface of the Earth as the Earth rotates beneath it.
Correct Answer:
B
— Polar orbit
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Q. Which type of orbit allows a satellite to pass over the same point on the Earth's surface at the same local solar time every day?
A.
Polar orbit
B.
Geostationary orbit
C.
Sun-synchronous orbit
D.
Elliptical orbit
Show solution
Solution
A sun-synchronous orbit allows a satellite to pass over the same point on the Earth's surface at the same local solar time every day, as it is synchronized with the Earth's position relative to the Sun.
Correct Answer:
C
— Sun-synchronous orbit
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Q. Which type of radiation consists of helium nuclei?
A.
Alpha radiation
B.
Beta radiation
C.
Gamma radiation
D.
X-rays
Show solution
Solution
Alpha radiation consists of helium nuclei, which are emitted during certain types of radioactive decay.
Correct Answer:
A
— Alpha radiation
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Q. Which type of satellite orbit is best for monitoring weather patterns?
A.
Geostationary orbit
B.
Polar orbit
C.
Elliptical orbit
D.
Low Earth orbit
Show solution
Solution
Geostationary satellites are ideal for monitoring weather patterns as they provide a constant view of the same area.
Correct Answer:
A
— Geostationary orbit
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Q. Which type of satellite orbit is best for weather monitoring?
A.
Geostationary orbit
B.
Polar orbit
C.
Elliptical orbit
D.
Low Earth orbit
Show solution
Solution
Geostationary orbits are ideal for weather monitoring as they provide a constant view of the same area of the Earth.
Correct Answer:
A
— Geostationary orbit
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Q. Which type of semiconductor has an excess of electrons?
A.
P-type
B.
N-type
C.
Intrinsic
D.
Extrinsic
Show solution
Solution
N-type semiconductors have an excess of electrons due to the addition of donor impurities.
Correct Answer:
B
— N-type
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Q. Which type of solution does Raoult's Law apply to most accurately?
A.
Ideal solutions
B.
Non-ideal solutions
C.
Concentrated solutions
D.
Dilute solutions
Show solution
Solution
Raoult's Law applies most accurately to ideal solutions, where interactions between different molecules are similar to those in pure substances.
Correct Answer:
A
— Ideal solutions
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Q. Which vitamin can be synthesized by the body when exposed to sunlight?
A.
Vitamin A
B.
Vitamin B12
C.
Vitamin C
D.
Vitamin D
Show solution
Solution
Vitamin D can be synthesized by the body when the skin is exposed to sunlight.
Correct Answer:
D
— Vitamin D
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Q. Which vitamin deficiency can lead to night blindness?
A.
Vitamin A
B.
Vitamin B12
C.
Vitamin C
D.
Vitamin D
Show solution
Solution
A deficiency in Vitamin A can lead to night blindness, as it is crucial for maintaining healthy vision.
Correct Answer:
A
— Vitamin A
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Q. Which vitamin deficiency can lead to scurvy?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin K
D.
Vitamin B1
Show solution
Solution
A deficiency in Vitamin C can lead to scurvy, characterized by symptoms such as bleeding gums and fatigue.
Correct Answer:
B
— Vitamin C
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Q. Which vitamin is a powerful antioxidant?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin E
D.
Vitamin D
Show solution
Solution
Vitamin E is known for its antioxidant properties, helping to protect cells from oxidative damage.
Correct Answer:
C
— Vitamin E
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Q. Which vitamin is also known as thiamine?
A.
Vitamin B1
B.
Vitamin B2
C.
Vitamin B3
D.
Vitamin B6
Show solution
Solution
Vitamin B1 is also known as thiamine and is important for carbohydrate metabolism and nerve function.
Correct Answer:
A
— Vitamin B1
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Q. Which vitamin is commonly known as ascorbic acid?
A.
Vitamin A
B.
Vitamin B12
C.
Vitamin C
D.
Vitamin D
Show solution
Solution
Ascorbic acid is the chemical name for Vitamin C, which is important for immune function.
Correct Answer:
C
— Vitamin C
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Q. Which vitamin is crucial for red blood cell formation?
A.
Vitamin B6
B.
Vitamin B12
C.
Vitamin C
D.
Vitamin D
Show solution
Solution
Vitamin B12 is crucial for the formation of red blood cells and the maintenance of the nervous system.
Correct Answer:
B
— Vitamin B12
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Q. Which vitamin is essential for the synthesis of coenzyme A?
A.
Vitamin B1
B.
Vitamin B2
C.
Vitamin B5
D.
Vitamin B12
Show solution
Solution
Vitamin B5, also known as pantothenic acid, is essential for the synthesis of coenzyme A, which is important in fatty acid metabolism.
Correct Answer:
C
— Vitamin B5
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Q. Which vitamin is essential for the synthesis of collagen?
A.
Vitamin A
B.
Vitamin B12
C.
Vitamin C
D.
Vitamin D
Show solution
Solution
Vitamin C is crucial for the synthesis of collagen, a key structural protein in the body.
Correct Answer:
C
— Vitamin C
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Q. Which vitamin is essential for the synthesis of retinal?
A.
Vitamin A
B.
Vitamin B2
C.
Vitamin C
D.
Vitamin D
Show solution
Solution
Vitamin A is essential for the synthesis of retinal, which is important for vision.
Correct Answer:
A
— Vitamin A
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Q. Which vitamin is important for blood clotting?
A.
Vitamin K
B.
Vitamin D
C.
Vitamin B6
D.
Vitamin C
Show solution
Solution
Vitamin K is essential for the synthesis of proteins required for blood clotting.
Correct Answer:
A
— Vitamin K
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Q. Which vitamin is important for the metabolism of amino acids?
A.
Vitamin B1
B.
Vitamin B6
C.
Vitamin B12
D.
Vitamin C
Show solution
Solution
Vitamin B6 is important for amino acid metabolism and the synthesis of neurotransmitters.
Correct Answer:
B
— Vitamin B6
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Q. Which vitamin is important for the metabolism of carbohydrates and amino acids?
A.
Vitamin B1
B.
Vitamin B2
C.
Vitamin B6
D.
All of the above
Show solution
Solution
Vitamins B1, B2, and B6 all play important roles in the metabolism of carbohydrates and amino acids.
Correct Answer:
D
— All of the above
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Q. Which vitamin is important for the metabolism of carbohydrates?
A.
Vitamin B1
B.
Vitamin B2
C.
Vitamin B3
D.
Vitamin B6
Show solution
Solution
Vitamin B1, also known as thiamine, is important for carbohydrate metabolism.
Correct Answer:
A
— Vitamin B1
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Q. Which vitamin is important for the metabolism of fatty acids?
A.
Vitamin B1
B.
Vitamin B2
C.
Vitamin B3
D.
Vitamin B5
Show solution
Solution
Vitamin B5, also known as pantothenic acid, is important for the metabolism of fatty acids.
Correct Answer:
D
— Vitamin B5
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