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 alkaline earth metal is used in fireworks for producing a red flame?
A.
Beryllium
B.
Magnesium
C.
Calcium
D.
Strontium
Show solution
Solution
Strontium is used in fireworks to produce a red flame.
Correct Answer:
D
— Strontium
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Q. Which alkaline earth metal is used in the production of fireworks?
A.
Calcium
B.
Strontium
C.
Barium
D.
Magnesium
Show solution
Solution
Strontium is used in fireworks to produce red colors.
Correct Answer:
B
— Strontium
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Q. Which alkane is used as a fuel in lighters?
A.
Methane
B.
Ethane
C.
Butane
D.
Propane
Show solution
Solution
Butane is commonly used as a fuel in lighters.
Correct Answer:
C
— Butane
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Q. Which alkane is used as a refrigerant?
A.
Methane
B.
Ethane
C.
Propane
D.
Butane
Show solution
Solution
Propane is commonly used as a refrigerant due to its favorable thermodynamic properties.
Correct Answer:
C
— Propane
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Q. Which amine is expected to have the highest boiling point?
A.
Methylamine
B.
Ethylamine
C.
Dimethylamine
D.
Trimethylamine
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Solution
Ethylamine has the highest boiling point due to its ability to form stronger hydrogen bonds compared to the others.
Correct Answer:
B
— Ethylamine
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Q. Which amine is known for its strong fishy odor?
A.
Methylamine
B.
Ethylamine
C.
Trimethylamine
D.
Aniline
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Solution
Trimethylamine is known for its strong fishy odor, often associated with decaying fish.
Correct Answer:
C
— Trimethylamine
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Q. Which amine is most likely to undergo electrophilic aromatic substitution?
A.
Aniline
B.
Methylamine
C.
Dimethylamine
D.
Triethylamine
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Solution
Aniline is most likely to undergo electrophilic aromatic substitution due to the presence of the amino group, which is a strong activating group.
Correct Answer:
A
— Aniline
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Q. Which amine is most soluble in water?
A.
Triethylamine
B.
Methylamine
C.
Aniline
D.
Benzylamine
Show solution
Solution
Methylamine is the most soluble in water due to its smaller size and ability to form hydrogen bonds.
Correct Answer:
B
— Methylamine
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Q. Which amine is used as a local anesthetic?
A.
Lidocaine
B.
Aniline
C.
Methylamine
D.
Ethylamine
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Solution
Lidocaine is an amine used as a local anesthetic.
Correct Answer:
A
— Lidocaine
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Q. Which amine is used as a solvent in organic reactions?
A.
Aniline
B.
Triethylamine
C.
Methylamine
D.
Pyridine
Show solution
Solution
Triethylamine is commonly used as a solvent in organic reactions.
Correct Answer:
B
— Triethylamine
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Q. Which biomolecule carries genetic information?
A.
Proteins
B.
Carbohydrates
C.
Lipids
D.
Nucleic acids
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Solution
Nucleic acids, such as DNA and RNA, are responsible for carrying genetic information.
Correct Answer:
D
— Nucleic acids
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Q. Which biomolecule is primarily involved in cell membrane structure?
A.
Carbohydrates
B.
Proteins
C.
Nucleic acids
D.
Lipids
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Solution
Lipids, particularly phospholipids, are the main components of cell membranes.
Correct Answer:
D
— Lipids
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Q. Which biomolecule is primarily involved in energy transfer within cells?
A.
DNA
B.
RNA
C.
ATP
D.
Proteins
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Solution
ATP (adenosine triphosphate) is the primary energy carrier in cells.
Correct Answer:
C
— ATP
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Q. Which biomolecule is primarily involved in genetic information storage?
A.
Proteins
B.
Carbohydrates
C.
Lipids
D.
Nucleic acids
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
D
— Nucleic acids
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Q. Which biomolecule is primarily responsible for energy storage in animals?
A.
Proteins
B.
Carbohydrates
C.
Lipids
D.
Nucleic acids
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Solution
Lipids, particularly triglycerides, are the main form of energy storage in animals.
Correct Answer:
C
— Lipids
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Q. Which biomolecule is primarily responsible for storing genetic information?
A.
Proteins
B.
Lipids
C.
Carbohydrates
D.
Nucleic acids
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
D
— Nucleic acids
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Q. Which biomolecule is primarily responsible for the genetic information in cells?
A.
Proteins
B.
Lipids
C.
Nucleic acids
D.
Carbohydrates
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
C
— Nucleic acids
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Q. Which biomolecule is primarily responsible for the storage of genetic information?
A.
Proteins
B.
Lipids
C.
Nucleic acids
D.
Carbohydrates
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
C
— Nucleic acids
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Q. Which biomolecule is primarily responsible for the structure of cell membranes?
A.
Proteins
B.
Carbohydrates
C.
Nucleic acids
D.
Lipids
Show solution
Solution
Lipids, particularly phospholipids, are the main components of cell membranes.
Correct Answer:
D
— Lipids
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Q. Which biomolecule is used for energy storage in animals?
A.
Glycogen
B.
Cellulose
C.
Starch
D.
Chitin
Show solution
Solution
Glycogen is the primary form of energy storage in animals.
Correct Answer:
A
— Glycogen
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Q. Which biomolecule is used for quick energy?
A.
Proteins
B.
Lipids
C.
Carbohydrates
D.
Nucleic acids
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Solution
Carbohydrates are primarily used for quick energy by living organisms.
Correct Answer:
C
— Carbohydrates
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Q. Which biomolecule serves as the main component of cell membranes?
A.
Proteins
B.
Carbohydrates
C.
Nucleic acids
D.
Phospholipids
Show solution
Solution
Phospholipids are the main component of cell membranes, forming a bilayer structure.
Correct Answer:
D
— Phospholipids
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Q. Which bond is primarily responsible for the secondary structure of proteins?
A.
Ionic bonds
B.
Hydrogen bonds
C.
Disulfide bonds
D.
Peptide bonds
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Solution
The secondary structure of proteins, such as alpha-helices and beta-sheets, is stabilized by hydrogen bonds between the backbone atoms.
Correct Answer:
B
— Hydrogen bonds
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Q. Which carbohydrate is a structural component of plant cell walls?
A.
Starch
B.
Glycogen
C.
Cellulose
D.
Fructose
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Solution
Cellulose is a polysaccharide that provides structural support in plant cell walls.
Correct Answer:
C
— Cellulose
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Q. Which carbohydrate is commonly used as a sweetener?
A.
Lactose
B.
Maltose
C.
Fructose
D.
Cellulose
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Solution
Fructose is commonly used as a sweetener due to its high sweetness level.
Correct Answer:
C
— Fructose
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Q. Which carbohydrate is found in milk?
A.
Lactose
B.
Maltose
C.
Glucose
D.
Fructose
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Solution
Lactose is the sugar found in milk, composed of glucose and galactose.
Correct Answer:
A
— Lactose
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Q. Which carbohydrate is found in the structure of DNA?
A.
Glucose
B.
Ribose
C.
Fructose
D.
Mannose
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Solution
Ribose is the sugar component of RNA, while deoxyribose is found in DNA.
Correct Answer:
B
— Ribose
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Q. Which carbohydrate is known as blood sugar?
A.
Galactose
B.
Fructose
C.
Glucose
D.
Ribose
Show solution
Solution
Glucose is commonly referred to as blood sugar as it is the primary energy source for the body's cells.
Correct Answer:
C
— Glucose
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Q. Which carbohydrate is primarily stored in animal liver and muscle?
A.
Cellulose
B.
Starch
C.
Glycogen
D.
Fructose
Show solution
Solution
Glycogen is the carbohydrate primarily stored in animal liver and muscle as a form of energy reserve.
Correct Answer:
C
— Glycogen
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Q. Which chemical compound is primarily responsible for ozone depletion?
A.
CFCs
B.
CO2
C.
SO2
D.
NOx
Show solution
Solution
Chlorofluorocarbons (CFCs) are primarily responsible for ozone depletion in the stratosphere.
Correct Answer:
A
— CFCs
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