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 practical application of total internal reflection?

A. Lenses in glasses.
B. Mirrors in telescopes.
C. Fiber optic communication.
D. Convex lenses.

Solution

Fiber optic communication relies on total internal reflection to transmit light signals over long distances with minimal loss.

Correct Answer: C — Fiber optic communication.

Q. Which of the following is a primary alcohol derived from an alkane?

A. Methanol
B. Ethanol
C. Propan-1-ol
D. Butanol

Solution

Propan-1-ol is a primary alcohol derived from propane.

Correct Answer: C — Propan-1-ol

Q. Which of the following is a primary alcohol?

A. 1-butanol
B. 2-butanol
C. tert-butanol
D. cyclohexanol

Solution

1-butanol has the hydroxyl group attached to a primary carbon atom.

Correct Answer: A — 1-butanol

Q. Which of the following is a primary amine?

A. CH3NH2
B. (CH3)2NH
C. (C2H5)3N
D. C6H5NH2

Solution

CH3NH2 is a primary amine as it has one alkyl group attached to the nitrogen atom.

Correct Answer: A — CH3NH2

Q. Which of the following is a primary cell?

A. Lead-acid battery
B. Nickel-cadmium battery
C. Zinc-carbon battery
D. Lithium-ion battery

Solution

The zinc-carbon battery is a primary cell, while the others are secondary cells.

Correct Answer: C — Zinc-carbon battery

Q. Which of the following is a primary haloalkane?

A. 1-bromobutane
B. 2-bromobutane
C. 3-bromobutane
D. Bromobenzene

Solution

1-bromobutane is a primary haloalkane as the carbon attached to the halogen is bonded to only one other carbon.

Correct Answer: A — 1-bromobutane

Q. Which of the following is a primary structure of proteins?

A. Sequence of amino acids
B. Alpha-helix structure
C. Beta-pleated sheet
D. Quaternary structure

Solution

The primary structure of proteins refers to the linear sequence of amino acids linked by peptide bonds.

Correct Answer: A — Sequence of amino acids

Q. Which of the following is a property of a Newtonian fluid?

A. Viscosity changes with shear rate
B. Constant viscosity regardless of shear rate
C. Non-linear flow behavior
D. High compressibility

Solution

A Newtonian fluid has a constant viscosity regardless of the shear rate.

Correct Answer: B — Constant viscosity regardless of shear rate

Q. Which of the following is a property of alkali metals?

A. They are good conductors of electricity
B. They are non-metals
C. They have high electronegativity
D. They are found in nature as free elements

Solution

Alkali metals are good conductors of electricity due to their free-moving electrons.

Correct Answer: A — They are good conductors of electricity

Q. Which of the following is a property of alkaline earth metals?

A. They are highly reactive with water
B. They have a higher density than alkali metals
C. They form acidic oxides
D. They have a full outer shell

Solution

Alkaline earth metals have a higher density than alkali metals.

Correct Answer: B — They have a higher density than alkali metals

Q. Which of the following is a property of alkanes?

A. They are polar
B. They are soluble in water
C. They are non-polar
D. They have high reactivity

Solution

Alkanes are non-polar molecules and are generally insoluble in water.

Correct Answer: C — They are non-polar

Q. Which of the following is a property of alkenes?

A. Saturated
B. Unsaturated
C. Non-polar
D. Inert

Solution

Alkenes are unsaturated hydrocarbons due to the presence of at least one double bond.

Correct Answer: B — Unsaturated

Q. Which of the following is a property of alkynes?

A. They are saturated
B. They contain a triple bond
C. They are less reactive than alkenes
D. They have the formula CnH2n

Solution

Alkynes contain at least one triple bond between carbon atoms.

Correct Answer: B — They contain a triple bond

Q. Which of the following is a property of aromatic compounds?

A. High reactivity
B. Planar structure
C. Non-polar nature
D. All of the above

Solution

Aromatic compounds are characterized by a planar structure and exhibit unique stability due to resonance, but they are generally less reactive than alkenes.

Correct Answer: B — Planar structure

Q. Which of the following is a property of aromatic hydrocarbons?

A. They are always saturated
B. They have a pleasant smell
C. They contain a benzene ring
D. They are non-polar

Solution

Aromatic hydrocarbons contain a benzene ring.

Correct Answer: C — They contain a benzene ring

Q. Which of the following is a property of carboxylic acids?

A. They are basic
B. They have high boiling points
C. They are insoluble in water
D. They do not form hydrogen bonds

Solution

Carboxylic acids have high boiling points due to hydrogen bonding.

Correct Answer: B — They have high boiling points

Q. Which of the following is a property of cycloalkanes?

A. They are always aromatic
B. They have a ring structure
C. They are unsaturated
D. They contain only single bonds

Solution

Cycloalkanes have a ring structure and can be saturated or unsaturated depending on the number of hydrogen atoms.

Correct Answer: B — They have a ring structure

Q. Which of the following is a property of diatomic hydrogen (H2)?

A. It is a liquid at room temperature
B. It is highly flammable
C. It has a high density
D. It is a good conductor of electricity

Solution

Diatomic hydrogen (H2) is highly flammable and can easily ignite in the presence of oxygen.

Correct Answer: B — It is highly flammable

Q. Which of the following is a property of elastomers?

A. Brittle
B. Rigid
C. Elastic
D. Insoluble

Solution

Elastomers are known for their elastic properties, allowing them to stretch and return to their original shape.

Correct Answer: C — Elastic

Q. Which of the following is a property of fluids?

A. Incompressibility
B. Elasticity
C. Brittleness
D. Ductility

Solution

Fluids are often considered incompressible for practical purposes, especially in hydrodynamics.

Correct Answer: A — Incompressibility

Q. Which of the following is a property of group 13 elements?

A. Form anions
B. Form covalent compounds
C. High ionization energy
D. High electronegativity

Solution

Group 13 elements typically form covalent compounds due to their electron configuration.

Correct Answer: B — Form covalent compounds

Q. Which of the following is a property of group 14 elements?

A. Forming ionic bonds
B. Forming covalent bonds
C. High reactivity
D. Low melting points

Solution

Group 14 elements typically form covalent bonds due to their tetravalent nature.

Correct Answer: B — Forming covalent bonds

Q. Which of the following is a property of group 14 p-block elements?

A. Forming ionic bonds
B. Forming covalent bonds
C. High electronegativity
D. Low melting points

Solution

Group 14 p-block elements typically form covalent bonds due to their valence electron configuration.

Correct Answer: B — Forming covalent bonds

Q. Which of the following is a property of group 15 elements?

A. Forming diatomic molecules
B. High ionization energies
C. Forming ionic bonds
D. Exist in multiple allotropes

Solution

Group 15 elements, such as phosphorus, exist in multiple allotropes.

Correct Answer: D — Exist in multiple allotropes

Q. Which of the following is a property of group 17 elements?

A. They are all gases
B. They are all metals
C. They are highly electronegative
D. They have low ionization energies

Solution

Group 17 elements, also known as halogens, are highly electronegative.

Correct Answer: C — They are highly electronegative

Q. Which of the following is a property of halogens?

A. Good conductors of electricity
B. Diatomic molecules
C. High melting points
D. All are gases at room temperature

Solution

Halogens exist as diatomic molecules (e.g., Cl2, F2) in their elemental form.

Correct Answer: B — Diatomic molecules

Q. Which of the following is a property of heavy water (D2O)?

A. It is lighter than regular water
B. It has a higher boiling point than regular water
C. It is more reactive than regular water
D. It is less dense than regular water

Solution

Heavy water (D2O) has a higher boiling point than regular water (H2O).

Correct Answer: B — It has a higher boiling point than regular water

Q. Which of the following is a property of heavy water?

A. It is lighter than regular water
B. It has a higher boiling point than regular water
C. It is more reactive than regular water
D. It is less dense than regular water

Solution

Heavy water (D2O) has a higher boiling point than regular water (H2O).

Correct Answer: B — It has a higher boiling point than regular water

Q. Which of the following is a property of hydrogen chloride (HCl)?

A. It is a gas at room temperature
B. It is a strong base
C. It is insoluble in water
D. It has a high boiling point

Solution

Hydrogen chloride (HCl) is a gas at room temperature and is highly soluble in water.

Correct Answer: A — It is a gas at room temperature

Q. Which of the following is a property of hydrogen chloride gas?

A. It is a strong base
B. It is a colorless gas
C. It is insoluble in water
D. It is a non-polar molecule

Solution

Hydrogen chloride (HCl) is a colorless gas that is soluble in water.

Correct Answer: B — It is a colorless gas

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