Q. Which biomolecule is primarily responsible for energy storage in animals?
A.
Proteins
B.
Carbohydrates
C.
Lipids
D.
Nucleic acids
Show solution
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
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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
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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 used for energy storage in animals?
A.
Glycogen
B.
Cellulose
C.
Starch
D.
Chitin
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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
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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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Q. Which chemical is commonly found in household bleach?
A.
Hydrogen peroxide
B.
Sodium hypochlorite
C.
Ammonium hydroxide
D.
Calcium hypochlorite
Show solution
Solution
Sodium hypochlorite is the active ingredient in most household bleach products.
Correct Answer:
B
— Sodium hypochlorite
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Q. Which chemical is commonly used as a food preservative?
A.
Sodium chloride
B.
Sodium benzoate
C.
Vinegar
D.
Sugar
Show solution
Solution
Sodium benzoate is a widely used food preservative that inhibits the growth of bacteria and fungi.
Correct Answer:
B
— Sodium benzoate
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Q. Which chemical is commonly used to treat drinking water?
A.
Chlorine
B.
Fluoride
C.
Sodium bicarbonate
D.
Sulfuric acid
Show solution
Solution
Chlorine is commonly used to disinfect drinking water and kill harmful bacteria.
Correct Answer:
A
— Chlorine
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Q. Which chemical is primarily responsible for ozone depletion?
A.
Carbon Dioxide
B.
Chlorofluorocarbons (CFCs)
C.
Methane
D.
Sulfur Dioxide
Show solution
Solution
Chlorofluorocarbons (CFCs) are primarily responsible for ozone depletion in the stratosphere.
Correct Answer:
B
— Chlorofluorocarbons (CFCs)
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Q. Which chemical is primarily responsible for the depletion of the ozone layer?
A.
Carbon Dioxide
B.
Chlorofluorocarbons (CFCs)
C.
Methane
D.
Sulfur Dioxide
Show solution
Solution
Chlorofluorocarbons (CFCs) are responsible for the depletion of the ozone layer, as they release chlorine atoms that destroy ozone molecules.
Correct Answer:
B
— Chlorofluorocarbons (CFCs)
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Q. Which colligative property can be used to determine the molar mass of a solute?
A.
Vapor pressure lowering
B.
Boiling point elevation
C.
Freezing point depression
D.
All of the above
Show solution
Solution
All of these colligative properties can be used to determine the molar mass of a solute.
Correct Answer:
D
— All of the above
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Q. Which colligative property is affected by the presence of electrolytes?
A.
Vapor pressure lowering
B.
Boiling point elevation
C.
Freezing point depression
D.
All of the above
Show solution
Solution
Electrolytes dissociate into ions, affecting all colligative properties by increasing the number of solute particles.
Correct Answer:
D
— All of the above
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Q. Which colligative property is used to determine molar mass of a solute?
A.
Boiling point elevation
B.
Freezing point depression
C.
Osmotic pressure
D.
All of the above
Show solution
Solution
All of these colligative properties can be used to determine the molar mass of a solute by applying the appropriate formulas.
Correct Answer:
D
— All of the above
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Q. Which colligative property is used to determine the molar mass of a solute?
A.
Boiling point elevation
B.
Freezing point depression
C.
Osmotic pressure
D.
All of the above
Show solution
Solution
All of the listed colligative properties can be used to determine the molar mass of a solute.
Correct Answer:
D
— All of the above
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Q. Which compound can exhibit both structural and geometric isomerism?
A.
C2H4
B.
C4H8
C.
C5H10
D.
C3H6
Show solution
Solution
C4H8 can exhibit both structural isomerism (different structures) and geometric isomerism (cis/trans forms).
Correct Answer:
B
— C4H8
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Q. Which compound does NOT exhibit optical isomerism?
A.
Lactic acid
B.
Glucose
C.
2-butanol
D.
Butan-2-one
Show solution
Solution
Butan-2-one does not have a chiral center and therefore does not exhibit optical isomerism.
Correct Answer:
D
— Butan-2-one
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Q. Which compound exhibits optical isomerism?
A.
2-butanol
B.
1-butanol
C.
Cyclohexane
D.
Ethylene
Show solution
Solution
2-butanol has a chiral center and can exist as two enantiomers, thus exhibiting optical isomerism.
Correct Answer:
A
— 2-butanol
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Q. Which compound is commonly used as a preservative in food?
A.
Sodium chloride
B.
Sodium benzoate
C.
Potassium nitrate
D.
Calcium carbonate
Show solution
Solution
Sodium benzoate is widely used as a food preservative to prevent spoilage.
Correct Answer:
B
— Sodium benzoate
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Q. Which element has the electronic configuration 1s2 2s2 2p6 3s2 3p1?
Show solution
Solution
The element with the configuration 1s2 2s2 2p6 3s2 3p1 is Aluminum (Al).
Correct Answer:
A
— Al
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Chemistry Syllabus (JEE Main) MCQ & Objective Questions
The Chemistry Syllabus for JEE Main is crucial for students aiming to excel in their exams. Understanding this syllabus not only helps in grasping fundamental concepts but also enhances performance in objective questions and MCQs. Regular practice with these types of questions is essential for scoring better and mastering important topics.
What You Will Practise Here
Basic Concepts of Chemistry
Atomic Structure and Chemical Bonding
States of Matter: Gases and Liquids
Thermodynamics and Thermochemistry
Equilibrium: Chemical and Ionic
Redox Reactions and Electrochemistry
Hydrocarbons and Environmental Chemistry
Exam Relevance
The Chemistry syllabus is a significant part of CBSE, State Boards, NEET, and JEE exams. Questions from this syllabus often appear in various formats, including multiple-choice questions, assertion-reason type questions, and numerical problems. Familiarity with the common question patterns can greatly enhance your exam preparation and confidence.
Common Mistakes Students Make
Misunderstanding the periodic trends and their implications.
Confusing different types of chemical bonds and their properties.
Neglecting to balance redox reactions properly.
Overlooking the significance of units in thermodynamic calculations.
Failing to apply concepts of equilibrium in problem-solving.
FAQs
Question: What are the key topics I should focus on in the Chemistry syllabus for JEE Main?Answer: Focus on atomic structure, chemical bonding, thermodynamics, and equilibrium as they are frequently tested.
Question: How can I improve my performance in Chemistry MCQs?Answer: Regular practice with past papers and understanding concepts deeply will help you tackle MCQs effectively.
Start your journey towards mastering the Chemistry Syllabus (JEE Main) by solving practice MCQs today. Test your understanding and build confidence for your exams!