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 compounds can undergo polymerization to form polyethylene?
A.
Propylene
B.
Butylene
C.
Ethylene
D.
Isobutylene
Show solution
Solution
Ethylene can undergo addition polymerization to form polyethylene, a common plastic.
Correct Answer:
C
— Ethylene
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Q. Which of the following compounds cannot be oxidized?
A.
Aldehyde
B.
Primary alcohol
C.
Secondary alcohol
D.
Ketone
Show solution
Solution
Ketones cannot be oxidized further under normal conditions, unlike aldehydes and alcohols.
Correct Answer:
D
— Ketone
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Q. Which of the following compounds contains a p-block element?
A.
NaCl
B.
MgO
C.
AlCl3
D.
Fe2O3
Show solution
Solution
AlCl3 contains aluminum, which is a p-block element.
Correct Answer:
C
— AlCl3
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Q. Which of the following compounds contains hydrogen in a +1 oxidation state?
A.
H2O
B.
H2S
C.
NaH
D.
LiH
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Solution
In water (H2O), hydrogen has an oxidation state of +1.
Correct Answer:
A
— H2O
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Q. Which of the following compounds does NOT exhibit geometric isomerism?
A.
Cis-2-butene
B.
Trans-2-butene
C.
1,2-dichloroethene
D.
Ethane
Show solution
Solution
Ethane does not have a double bond or any substituents that would allow for geometric isomerism.
Correct Answer:
D
— Ethane
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Q. Which of the following compounds does NOT exhibit isomerism?
A.
C2H4
B.
C3H6
C.
C4H8
D.
C5H10
Show solution
Solution
C2H4 (ethylene) does not have enough carbon atoms to exhibit isomerism.
Correct Answer:
A
— C2H4
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Q. Which of the following compounds does NOT exhibit optical isomerism?
A.
Lactic acid
B.
Tartaric acid
C.
2-butanol
D.
Butane
Show solution
Solution
Butane does not have a chiral center and therefore does not exhibit optical isomerism.
Correct Answer:
D
— Butane
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Q. Which of the following compounds does NOT show optical isomerism?
A.
Lactic acid
B.
Tartaric acid
C.
2-Butanol
D.
Butane
Show solution
Solution
Butane does not show optical isomerism as it does not have a chiral center.
Correct Answer:
D
— Butane
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Q. Which of the following compounds exhibits geometric isomerism?
A.
1-butene
B.
2-butene
C.
butane
D.
cyclohexane
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Solution
2-butene has a double bond between the second and third carbon atoms, allowing for cis and trans isomers.
Correct Answer:
B
— 2-butene
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Q. Which of the following compounds exhibits hydrogen bonding?
A.
HCl
B.
NH3
C.
CH4
D.
NaCl
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Solution
NH3 exhibits hydrogen bonding due to the presence of a nitrogen atom bonded to hydrogen.
Correct Answer:
B
— NH3
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Q. Which of the following compounds exhibits sp3d hybridization?
A.
SF4
B.
XeF2
C.
NH3
D.
C2H4
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Solution
In SF4, the sulfur atom is sp3d hybridized, resulting in a seesaw molecular geometry.
Correct Answer:
A
— SF4
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Q. Which of the following compounds has a linear shape?
A.
H2O
B.
C2H2
C.
NH3
D.
CH4
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Solution
C2H2 (ethyne) has a linear shape due to sp hybridization of carbon.
Correct Answer:
B
— C2H2
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Q. Which of the following compounds has a trigonal planar geometry?
A.
CH4
B.
BF3
C.
NH3
D.
H2O
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Solution
BF3 has a trigonal planar geometry due to the sp2 hybridization of boron.
Correct Answer:
B
— BF3
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Q. Which of the following compounds has the highest boiling point?
A.
CH4
B.
C2H6
C.
C3H8
D.
C4H10
Show solution
Solution
C4H10 (butane) has the highest boiling point due to its larger molecular size and greater van der Waals forces.
Correct Answer:
D
— C4H10
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Q. Which of the following compounds has the highest electronegativity difference?
A.
HCl
B.
NaCl
C.
CO
D.
CH4
Show solution
Solution
Sodium chloride (NaCl) has the highest electronegativity difference between sodium and chlorine.
Correct Answer:
B
— NaCl
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Q. Which of the following compounds is a cyclic hydrocarbon?
A.
C6H12
B.
C5H10
C.
C4H8
D.
C3H6
Show solution
Solution
C6H12 can be cyclohexane, which is a cyclic hydrocarbon.
Correct Answer:
A
— C6H12
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Q. Which of the following compounds is a cycloalkane?
A.
C3H6
B.
C5H10
C.
C4H8
D.
C6H12
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Solution
C5H10 can be a cycloalkane (cyclopentane) as it forms a ring structure.
Correct Answer:
B
— C5H10
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Q. Which of the following compounds is a derivative of carboxylic acid?
A.
Alcohol
B.
Ester
C.
Aldehyde
D.
Ketone
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Solution
Esters are derivatives of carboxylic acids formed by the reaction of an acid and an alcohol.
Correct Answer:
B
— Ester
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Q. Which of the following compounds is a haloarene?
A.
Chloroethane
B.
Bromobenzene
C.
Iodobutane
D.
Fluoropropane
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Solution
Bromobenzene contains a benzene ring with a bromine substituent, making it a haloarene.
Correct Answer:
B
— Bromobenzene
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Q. Which of the following compounds is a ketone?
A.
CH3CHO
B.
C2H5OH
C.
C3H6O
D.
C4H8
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Solution
C3H6O is a ketone as it has a carbonyl group (C=O) between two carbon atoms.
Correct Answer:
C
— C3H6O
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Q. Which of the following compounds is a pair of structural isomers?
A.
C2H6 and C2H4
B.
C3H8 and C3H6
C.
C4H10 and C4H10
D.
C5H12 and C5H12
Show solution
Solution
C2H6 (ethane) and C2H4 (ethylene) have different molecular structures, thus they are structural isomers.
Correct Answer:
A
— C2H6 and C2H4
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Q. Which of the following compounds is a phenol?
A.
Benzyl alcohol
B.
Cyclohexanol
C.
Phenol
D.
Ethanol
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Solution
Phenol is an aromatic compound with a hydroxyl group directly attached to a benzene ring.
Correct Answer:
C
— Phenol
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Q. Which of the following compounds is a primary amine?
A.
CH3NH2
B.
(CH3)2NH
C.
(CH3)3N
D.
C6H5NH2
Show solution
Solution
CH3NH2 is a primary amine as it has one alkyl group attached to the nitrogen.
Correct Answer:
A
— CH3NH2
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Q. Which of the following compounds is a saturated hydrocarbon?
A.
C2H2
B.
C3H4
C.
C4H8
D.
C5H12
Show solution
Solution
C5H12 (pentane) is a saturated hydrocarbon with single bonds only.
Correct Answer:
D
— C5H12
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Q. Which of the following compounds is a strong acid formed from hydrogen?
A.
HCl
B.
H2O
C.
NH3
D.
CH4
Show solution
Solution
Hydrochloric acid (HCl) is a strong acid formed from hydrogen.
Correct Answer:
A
— HCl
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Q. Which of the following compounds is a strong electrolyte?
A.
Glucose
B.
Acetic acid
C.
Sodium chloride
D.
Urea
Show solution
Solution
Sodium chloride dissociates completely in solution, making it a strong electrolyte.
Correct Answer:
C
— Sodium chloride
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Q. Which of the following compounds is a strong field ligand?
A.
H2O
B.
NH3
C.
CN-
D.
Cl-
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Solution
CN- is a strong field ligand and causes large splitting of d-orbitals.
Correct Answer:
C
— CN-
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Q. Which of the following compounds is a strong oxidizing agent?
A.
H2O2
B.
NaCl
C.
FeCl3
D.
CuSO4
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Solution
Hydrogen peroxide (H2O2) is a strong oxidizing agent.
Correct Answer:
A
— H2O2
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Q. Which of the following compounds is a strong reducing agent?
A.
H2O
B.
H2S
C.
HCl
D.
H2
Show solution
Solution
Hydrogen gas (H2) is a strong reducing agent as it can donate electrons to other substances.
Correct Answer:
D
— H2
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Q. Which of the following compounds is an aldehyde?
A.
C2H5OH
B.
CH3CHO
C.
C3H6O
D.
C6H12O6
Show solution
Solution
The compound CH3CHO is an aldehyde, characterized by the presence of the -CHO functional group.
Correct Answer:
B
— CH3CHO
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