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 characteristic property of p-block elements?
A.
High melting points
B.
Good conductors of electricity
C.
Form covalent bonds
D.
High density
Show solution
Solution
P-block elements typically form covalent bonds due to their electronegativity and valence electron configuration.
Correct Answer:
C
— Form covalent bonds
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Q. Which of the following is a characteristic property of phenols?
A.
Basicity
B.
Acidity
C.
Neutrality
D.
Inertness
Show solution
Solution
Phenols are weakly acidic due to the presence of the hydroxyl group attached to the aromatic ring.
Correct Answer:
B
— Acidity
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Q. Which of the following is a characteristic property of s-block elements?
A.
Form covalent bonds
B.
Form ionic bonds
C.
Have high electronegativity
D.
Are gases at room temperature
Show solution
Solution
S-block elements typically form ionic bonds due to their tendency to lose electrons.
Correct Answer:
B
— Form ionic bonds
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Q. Which of the following is a characteristic property of transition metals?
A.
High electronegativity
B.
Variable oxidation states
C.
Low melting points
D.
Non-conductivity
Show solution
Solution
Transition metals exhibit variable oxidation states due to the involvement of d-orbitals in bonding.
Correct Answer:
B
— Variable oxidation states
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Q. Which of the following is a characteristic reaction of alcohols?
A.
Nitration
B.
Esterification
C.
Halogenation
D.
Oxidation
Show solution
Solution
Alcohols undergo esterification when they react with carboxylic acids to form esters.
Correct Answer:
B
— Esterification
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Q. Which of the following is a characteristic reaction of aldehydes?
A.
Reduction to alcohols
B.
Formation of esters
C.
Dehydration
D.
Nitration
Show solution
Solution
Aldehydes can be reduced to alcohols, which is a characteristic reaction of this functional group.
Correct Answer:
A
— Reduction to alcohols
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Q. Which of the following is a characteristic reaction of alkanes?
A.
Nucleophilic substitution
B.
Electrophilic addition
C.
Free radical halogenation
D.
Hydrogenation
Show solution
Solution
Free radical halogenation is a characteristic reaction of alkanes.
Correct Answer:
C
— Free radical halogenation
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Q. Which of the following is a characteristic reaction of alkenes?
A.
Hydrogenation
B.
Hydrolysis
C.
Oxidation
D.
Reduction
Show solution
Solution
Alkenes undergo hydrogenation, where they react with hydrogen in the presence of a catalyst.
Correct Answer:
A
— Hydrogenation
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Q. Which of the following is a characteristic reaction of amines?
A.
Nitration
B.
Acylation
C.
Halogenation
D.
Oxidation
Show solution
Solution
Acylation is a characteristic reaction of amines, where they react with acyl chlorides to form amides.
Correct Answer:
B
— Acylation
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Q. Which of the following is a characteristic reaction of carboxylic acids?
A.
Formation of esters
B.
Formation of amides
C.
Decarboxylation
D.
All of the above
Show solution
Solution
Carboxylic acids can undergo esterification, amide formation, and decarboxylation, making 'All of the above' correct.
Correct Answer:
D
— All of the above
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Q. Which of the following is a characteristic reaction of ethers?
A.
Hydrolysis
B.
Oxidation
C.
Nucleophilic substitution
D.
Dehydration
Show solution
Solution
Ethers undergo nucleophilic substitution reactions under strong acidic conditions.
Correct Answer:
C
— Nucleophilic substitution
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Q. Which of the following is a characteristic reaction of haloalkanes?
A.
Electrophilic addition
B.
Nucleophilic substitution
C.
Free radical substitution
D.
Hydrogenation
Show solution
Solution
Nucleophilic substitution is a characteristic reaction of haloalkanes, where a nucleophile replaces the halogen atom.
Correct Answer:
B
— Nucleophilic substitution
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Q. Which of the following is a characteristic reaction of haloarenes?
A.
Nucleophilic substitution
B.
Electrophilic substitution
C.
Hydrogenation
D.
Dehydrohalogenation
Show solution
Solution
Haloarenes typically undergo nucleophilic substitution reactions due to the presence of the aromatic ring.
Correct Answer:
B
— Electrophilic substitution
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Q. Which of the following is a characteristic reaction of ketones?
A.
Oxidation to carboxylic acids
B.
Reduction to alcohols
C.
Formation of hemiacetals
D.
Formation of aldehydes
Show solution
Solution
Ketones can react with alcohols to form hemiacetals, which is a characteristic reaction.
Correct Answer:
C
— Formation of hemiacetals
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Q. Which of the following is a characteristic reaction of phenols?
A.
Formation of esters
B.
Formation of ethers
C.
Electrophilic substitution
D.
Reduction to alcohols
Show solution
Solution
Phenols undergo electrophilic substitution reactions due to the presence of the hydroxyl group, which activates the benzene ring.
Correct Answer:
C
— Electrophilic substitution
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Q. Which of the following is a colligative property?
A.
Boiling point elevation
B.
Density
C.
Viscosity
D.
Color
Show solution
Solution
Boiling point elevation is a colligative property that depends on the number of solute particles in a solution.
Correct Answer:
A
— Boiling point elevation
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Q. Which of the following is a common antiseptic used in households?
A.
Ethanol
B.
Acetic acid
C.
Sodium chloride
D.
Sodium bicarbonate
Show solution
Solution
Ethanol is widely used as an antiseptic in households for disinfecting purposes.
Correct Answer:
A
— Ethanol
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Q. Which of the following is a common application of adsorption?
A.
Catalysis
B.
Separation of gases
C.
Water purification
D.
All of the above
Show solution
Solution
Adsorption is widely used in catalysis, gas separation, and water purification processes.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common application of baking soda in cooking?
A.
Thickening agent
B.
Leavening agent
C.
Flavor enhancer
D.
Preservative
Show solution
Solution
Baking soda acts as a leavening agent, helping baked goods rise by producing carbon dioxide.
Correct Answer:
B
— Leavening agent
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Q. Which of the following is a common application of digital modulation?
A.
Television broadcasting
B.
AM radio
C.
Satellite communication
D.
Analog audio transmission
Show solution
Solution
Digital modulation is commonly used in satellite communication.
Correct Answer:
C
— Satellite communication
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Q. Which of the following is a common application of Phase Shift Keying (PSK)?
A.
Television broadcasting
B.
Satellite communication
C.
AM radio
D.
FM radio
Show solution
Solution
Phase Shift Keying (PSK) is commonly used in satellite communication.
Correct Answer:
B
— Satellite communication
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Q. Which of the following is a common electrophile in electrophilic aromatic substitution reactions?
A.
Bromine
B.
Hydrogen
C.
Water
D.
Methane
Show solution
Solution
Bromine, often in the presence of a catalyst like FeBr3, acts as a common electrophile in electrophilic aromatic substitution reactions.
Correct Answer:
A
— Bromine
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Q. Which of the following is a common electrophile in electrophilic aromatic substitution?
A.
Br2
B.
H2O
C.
NaOH
D.
CH3OH
Show solution
Solution
Bromine (Br2) can act as an electrophile in the presence of a catalyst like FeBr3 during electrophilic aromatic substitution.
Correct Answer:
A
— Br2
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Q. Which of the following is a common household disinfectant?
A.
Bleach
B.
Vinegar
C.
Baking soda
D.
Salt
Show solution
Solution
Bleach is widely used as a disinfectant to kill bacteria and viruses.
Correct Answer:
A
— Bleach
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Q. Which of the following is a common method for synthesizing aromatic compounds?
A.
Friedel-Crafts alkylation
B.
Hydrogenation
C.
Dehydration
D.
Oxidation
Show solution
Solution
Friedel-Crafts alkylation is a common method used to synthesize aromatic compounds by introducing alkyl groups onto the aromatic ring.
Correct Answer:
A
— Friedel-Crafts alkylation
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Q. Which of the following is a common method for the synthesis of aromatic compounds?
A.
Hydrogenation
B.
Dehydrogenation
C.
Electrophilic substitution
D.
Nucleophilic addition
Show solution
Solution
Electrophilic substitution is a common method for synthesizing aromatic compounds by introducing new substituents onto the aromatic ring.
Correct Answer:
C
— Electrophilic substitution
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Q. Which of the following is a common method to measure the surface area of adsorbents?
A.
TGA
B.
BET method
C.
XRD
D.
FTIR
Show solution
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer:
B
— BET method
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Q. Which of the following is a common method to measure the surface area of an adsorbent?
A.
TGA
B.
BET method
C.
XRD
D.
FTIR
Show solution
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer:
B
— BET method
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Q. Which of the following is a common oxidation state of Chromium?
A.
+2
B.
+3
C.
+6
D.
All of the above
Show solution
Solution
Chromium can exhibit multiple oxidation states including +2, +3, and +6.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common oxidizing agent?
A.
H2O2
B.
NaCl
C.
CH4
D.
C6H12O6
Show solution
Solution
Hydrogen peroxide (H2O2) is a well-known oxidizing agent.
Correct Answer:
A
— H2O2
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