JEE Main Preparation Resources for Competitive Exams

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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.

Chemistry Syllabus (JEE Main) Mathematics Syllabus (JEE Main) Physics Syllabus (JEE Main)

Q. Which of the following is a structural polysaccharide?

A. Starch
B. Glycogen
C. Cellulose
D. Maltose

Solution

Cellulose is a structural polysaccharide found in the cell walls of plants.

Correct Answer: C — Cellulose

Q. Which of the following is a subset of {1, 2, 3}?

A. {1, 2}
B. {4}
C. {1, 2, 3, 4}
D. {2, 3, 4}

Solution

A subset is a set that contains elements from another set. {1, 2} is a subset of {1, 2, 3}.

Correct Answer: A — {1, 2}

Q. Which of the following is a subset of {x, y, z}?

A. {x, y}
B. {x, y, z, w}
C. {y, z, w}
D. {x, y, z, x}

Solution

A subset can only contain elements that are in the original set. {x, y} is a valid subset of {x, y, z}.

Correct Answer: A — {x, y}

Q. Which of the following is a terminal alkyne?

A. 1-butyne
B. 2-butyne
C. 1-pentyne
D. 3-pentyne

Solution

1-butyne is a terminal alkyne because it has a triple bond at the end of the carbon chain.

Correct Answer: A — 1-butyne

Q. Which of the following is a unit of concentration that expresses the amount of solute per volume of solution?

A. Molarity
B. Molality
C. Mole fraction
D. Normality

Solution

Molarity is defined as moles of solute per liter of solution.

Correct Answer: A — Molarity

Q. Which of the following is a unit of energy?

A. Joule
B. Newton
C. Watt
D. Pascal

Solution

Joule is the unit of energy in the SI system, defined as the work done when a force of one newton displaces an object by one meter.

Correct Answer: A — Joule

Q. Which of the following is a unit of enthalpy?

A. Joules
B. Calories
C. Kilojoules
D. All of the above

Solution

Enthalpy can be expressed in Joules, Calories, and Kilojoules.

Correct Answer: D — All of the above

Q. Which of the following is a unit of pressure?

A. Pascal
B. Joule
C. Coulomb
D. Liter

Solution

Pascal (Pa) is the SI unit of pressure, defined as one newton per square meter.

Correct Answer: A — Pascal

Q. Which of the following is a universal gate?

A. AND
B. OR
C. NAND
D. XOR

Solution

The NAND gate is a universal gate because it can be used to create any other gate.

Correct Answer: C — NAND

Q. Which of the following is an alkane?

A. C2H4
B. C3H6
C. C4H10
D. C5H8

Solution

Alkanes are saturated hydrocarbons with the general formula CnH2n+2. C4H10 (butane) fits this formula.

Correct Answer: C — C4H10

Q. Which of the following is an even function?

A. f(x) = x^3
B. f(x) = x^2
C. f(x) = sin(x)
D. f(x) = tan(x)

Solution

An even function satisfies f(x) = f(-x). f(x) = x^2 is even.

Correct Answer: B — f(x) = x^2

Q. Which of the following is an example of a -I effect?

A. –F
B. –OCH3
C. –CH3
D. –C2H5

Solution

The –F group is an example of a -I effect as it withdraws electron density through sigma bonds.

Correct Answer: A — –F

Q. Which of the following is an example of a -I group?

A. –F
B. –Cl
C. –Br
D. –I

Solution

All halogens (-F, -Cl, -Br, -I) exhibit -I effect, but -F is the strongest among them.

Correct Answer: A — –F

Q. Which of the following is an example of a -M effect?

A. –NO2
B. –CH3
C. –OCH3
D. –Cl

Solution

The –NO2 group withdraws electron density through resonance, exhibiting a -M effect.

Correct Answer: A — –NO2

Q. Which of the following is an example of a chemical change?

A. Melting ice
B. Boiling water
C. Baking a cake
D. Dissolving salt in water

Solution

Baking a cake is a chemical change as it results in the formation of new substances.

Correct Answer: C — Baking a cake

Q. Which of the following is an example of a compound that exhibits tautomeric isomerism?

A. Acetaldehyde
B. Acetone
C. Ethanol
D. Benzene

Solution

Acetaldehyde can exist in two forms (keto and enol) that readily interconvert, demonstrating tautomeric isomerism.

Correct Answer: A — Acetaldehyde

Q. Which of the following is an example of a copolymer?

A. Polyethylene
B. Nylon-6,6
C. Polystyrene
D. Polyvinyl chloride

Solution

Nylon-6,6 is a copolymer made from two different monomers: hexamethylenediamine and adipic acid.

Correct Answer: B — Nylon-6,6

Q. Which of the following is an example of a crystalline solid?

A. Sugar
B. Glass
C. Rubber
D. Plastic

Solution

Sugar is an example of a crystalline solid, characterized by a well-ordered structure.

Correct Answer: A — Sugar

Q. Which of the following is an example of a disproportionation reaction?

A. 2H2O2 → 2H2O + O2
B. Zn + CuSO4 → ZnSO4 + Cu
C. 2Na + Cl2 → 2NaCl
D. C + O2 → CO2

Solution

In the reaction 2H2O2 → 2H2O + O2, hydrogen peroxide is both oxidized and reduced.

Correct Answer: A — 2H2O2 → 2H2O + O2

Q. Which of the following is an example of a Lewis acid?

A. NH3
B. H2O
C. BF3
D. CH4

Solution

BF3 is a Lewis acid as it can accept a pair of electrons.

Correct Answer: C — BF3

Q. Which of the following is an example of a non-conservative force?

A. Gravitational force
B. Electrostatic force
C. Frictional force
D. Magnetic force

Solution

Frictional force is an example of a non-conservative force as it dissipates energy as heat.

Correct Answer: C — Frictional force

Q. Which of the following is an example of a non-contact force?

A. Friction
B. Tension
C. Magnetic force
D. Normal force

Solution

Magnetic force is an example of a non-contact force, as it acts at a distance.

Correct Answer: C — Magnetic force

Q. Which of the following is an example of a non-Newtonian fluid?

A. Water
B. Air
C. Cornstarch in water
D. Glycerin

Solution

Cornstarch in water (oobleck) is a non-Newtonian fluid that exhibits varying viscosity depending on the shear rate.

Correct Answer: C — Cornstarch in water

Q. Which of the following is an example of a physical adsorption?

A. Adsorption of O2 on activated charcoal
B. Adsorption of H2 on palladium
C. Adsorption of NH3 on silica gel
D. Adsorption of CO on metals

Solution

The adsorption of O2 on activated charcoal is an example of physical adsorption.

Correct Answer: A — Adsorption of O2 on activated charcoal

Q. Which of the following is an example of a physical change related to states of matter?

A. Burning wood
B. Dissolving sugar in water
C. Rusting of iron
D. Cooking an egg

Solution

Dissolving sugar in water is a physical change as it does not alter the chemical composition.

Correct Answer: B — Dissolving sugar in water

Q. Which of the following is an example of a synthetic detergent?

A. Soap
B. Sodium lauryl sulfate
C. Glycerin
D. Sodium bicarbonate

Solution

Sodium lauryl sulfate is a synthetic detergent commonly used in personal care products.

Correct Answer: B — Sodium lauryl sulfate

Q. Which of the following is an example of a synthetic polymer?

A. Rubber
B. Silk
C. Polyvinyl chloride (PVC)
D. Starch

Solution

Polyvinyl chloride (PVC) is a synthetic polymer widely used in construction and plumbing.

Correct Answer: C — Polyvinyl chloride (PVC)

Q. Which of the following is an example of an adiabatic process?

A. Heating water in a kettle
B. Compressing a gas in a piston without heat exchange
C. Cooling a gas in a refrigerator
D. Heating a metal rod in a flame

Solution

An adiabatic process is one in which no heat is exchanged with the surroundings. Compressing a gas in a piston without heat exchange is an example.

Correct Answer: B — Compressing a gas in a piston without heat exchange

Q. Which of the following is an example of an antibiotic?

A. Aspirin
B. Penicillin
C. Ibuprofen
D. Paracetamol

Solution

Penicillin is a well-known antibiotic used to treat bacterial infections.

Correct Answer: B — Penicillin

Q. Which of the following is an example of an endothermic reaction?

A. Respiration
B. Photosynthesis
C. Combustion
D. Neutralization

Solution

Photosynthesis is an endothermic process as it absorbs energy from sunlight.

Correct Answer: B — Photosynthesis

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