Q. What is the primary use of chlorine in water treatment?
A.
To increase pH
B.
To remove hardness
C.
As a disinfectant
D.
To add minerals
Show solution
Solution
Chlorine is primarily used as a disinfectant in water treatment.
Correct Answer:
C
— As a disinfectant
Learn More →
Q. What is the primary use of citric acid in food?
A.
Preservative
B.
Flavor enhancer
C.
Thickener
D.
Coloring agent
Show solution
Solution
Citric acid is commonly used as a flavor enhancer in food products.
Correct Answer:
B
— Flavor enhancer
Learn More →
Q. What is the primary use of ethanol in everyday life?
A.
Fuel
B.
Solvent
C.
Antiseptic
D.
All of the above
Show solution
Solution
Ethanol is used as a fuel, solvent, and antiseptic in various applications.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the primary use of hydrogen in the industry?
A.
Fertilizers
B.
Fuel cells
C.
Plastics
D.
Glass production
Show solution
Solution
Hydrogen is primarily used in fuel cells for energy production.
Correct Answer:
B
— Fuel cells
Learn More →
Q. What is the primary use of potassium in agriculture?
A.
Fertilizer
B.
Pesticide
C.
Herbicide
D.
Soil conditioner
Show solution
Solution
Potassium is primarily used as a fertilizer in agriculture.
Correct Answer:
A
— Fertilizer
Learn More →
Q. What is the primary use of silicon in the industry?
A.
Fertilizers
B.
Semiconductors
C.
Glass production
D.
Alloys
Show solution
Solution
Silicon is primarily used in the semiconductor industry.
Correct Answer:
B
— Semiconductors
Learn More →
Q. What is the primary use of sodium bicarbonate in households?
A.
Cleaning agent
B.
Food preservative
C.
Antacid
D.
All of the above
Show solution
Solution
Sodium bicarbonate is used for cleaning, as a food preservative, and as an antacid.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the primary use of sodium bicarbonate?
A.
Baking
B.
Medicine
C.
Cleaning
D.
All of the above
Show solution
Solution
Sodium bicarbonate is used in baking, medicine, and cleaning.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the primary use of Teflon?
A.
Insulation
B.
Non-stick coatings
C.
Adhesives
D.
Textiles
Show solution
Solution
Teflon is primarily used for non-stick coatings in cookware due to its low friction properties.
Correct Answer:
B
— Non-stick coatings
Learn More →
Q. What is the principal quantum number for an electron in the 5d subshell?
Show solution
Solution
The principal quantum number n for the 5d subshell is 5.
Correct Answer:
C
— 5
Learn More →
Q. What is the principal quantum number for an electron in the ground state of a hydrogen atom?
Show solution
Solution
The ground state of a hydrogen atom corresponds to n=1.
Correct Answer:
B
— 1
Learn More →
Q. What is the principal quantum number of the outermost electron in chlorine?
Show solution
Solution
Chlorine has an atomic number of 17, and its outermost electrons are in the n=3 shell.
Correct Answer:
B
— 3
Learn More →
Q. What is the principal quantum number of the outermost electron in potassium (K)?
Show solution
Solution
Potassium has the electronic configuration [Ar] 4s1, so the principal quantum number of the outermost electron is 4.
Correct Answer:
A
— 3
Learn More →
Q. What is the principal quantum number of the valence electrons in chlorine?
Show solution
Solution
Chlorine has an atomic number of 17, and its valence electrons are in the n=3 shell.
Correct Answer:
B
— 3
Learn More →
Q. What is the principle behind the law of conservation of mass?
A.
Mass can be created
B.
Mass can be destroyed
C.
Mass is constant in chemical reactions
D.
Mass is variable in reactions
Show solution
Solution
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.
Correct Answer:
C
— Mass is constant in chemical reactions
Learn More →
Q. What is the process called when a polymer is formed by the addition of monomers without the loss of any small molecules?
A.
Condensation polymerization
B.
Addition polymerization
C.
Cross-linking
D.
Chain termination
Show solution
Solution
Addition polymerization is the process where monomers add together without the loss of small molecules.
Correct Answer:
B
— Addition polymerization
Learn More →
Q. What is the process called when a polymer is formed by the elimination of a small molecule?
A.
Addition polymerization
B.
Condensation polymerization
C.
Chain-growth polymerization
D.
Step-growth polymerization
Show solution
Solution
Condensation polymerization is the process where a polymer is formed by the elimination of a small molecule.
Correct Answer:
B
— Condensation polymerization
Learn More →
Q. What is the process called when a solid changes directly into a gas?
A.
Sublimation
B.
Evaporation
C.
Condensation
D.
Deposition
Show solution
Solution
Sublimation is the process where a solid changes directly into a gas without passing through the liquid state.
Correct Answer:
A
— Sublimation
Learn More →
Q. What is the process of creating a polymer from monomers called?
A.
Polymerization
B.
Depolymerization
C.
Sublimation
D.
Condensation
Show solution
Solution
The process of creating a polymer from monomers is called polymerization.
Correct Answer:
A
— Polymerization
Learn More →
Q. What is the product formed when Fe2O3 is reduced by carbon monoxide?
Show solution
Solution
The product formed is Fe (iron) when Fe2O3 is reduced by carbon monoxide.
Correct Answer:
A
— Fe
Learn More →
Q. What is the product of the complete combustion of an alkane?
A.
Carbon monoxide and water
B.
Carbon dioxide and water
C.
Carbon and hydrogen
D.
Hydrogen gas
Show solution
Solution
The complete combustion of an alkane produces carbon dioxide and water.
Correct Answer:
B
— Carbon dioxide and water
Learn More →
Q. What is the product of the complete combustion of an alkyne?
A.
CO2 and H2O
B.
CO and H2O
C.
C and H2O
D.
C2H4
Show solution
Solution
The complete combustion of an alkyne produces carbon dioxide (CO2) and water (H2O).
Correct Answer:
A
— CO2 and H2O
Learn More →
Q. What is the product of the complete combustion of propane (C3H8)?
A.
CO2 and H2O
B.
CO and H2O
C.
C and H2O
D.
C2H4 and H2O
Show solution
Solution
The complete combustion of propane produces carbon dioxide (CO2) and water (H2O).
Correct Answer:
A
— CO2 and H2O
Learn More →
Q. What is the product of the complete hydrogenation of 2-butyne?
A.
1-butyne
B.
2-butyne
C.
butane
D.
butyne
Show solution
Solution
The complete hydrogenation of 2-butyne results in butane.
Correct Answer:
C
— butane
Learn More →
Q. What is the product of the decarboxylation of sodium acetate?
A.
Methane
B.
Ethane
C.
Carbon dioxide
D.
Acetic acid
Show solution
Solution
Decarboxylation of sodium acetate produces methane.
Correct Answer:
A
— Methane
Learn More →
Q. What is the product of the dehydration of 2-butanol?
A.
Butene
B.
Butyne
C.
Butadiene
D.
Butanol
Show solution
Solution
Dehydration of 2-butanol leads to the formation of butene as the major product.
Correct Answer:
A
— Butene
Learn More →
Q. What is the product of the dehydration of ethanol?
A.
Ethylene
B.
Acetaldehyde
C.
Diethyl ether
D.
Acetic acid
Show solution
Solution
Dehydration of ethanol leads to the formation of ethylene (ethene) by elimination of water.
Correct Answer:
A
— Ethylene
Learn More →
Q. What is the product of the esterification reaction between acetic acid and ethanol?
A.
Ethyl acetate
B.
Acetic anhydride
C.
Ethanol acetate
D.
Acetic acid
Show solution
Solution
The reaction between acetic acid and ethanol produces ethyl acetate.
Correct Answer:
A
— Ethyl acetate
Learn More →
Q. What is the product of the hydration of ethene in the presence of sulfuric acid?
A.
Ethanol
B.
Ethane
C.
Acetic acid
D.
Butanol
Show solution
Solution
The hydration of ethene in the presence of sulfuric acid produces ethanol.
Correct Answer:
A
— Ethanol
Learn More →
Q. What is the product of the hydrolysis of 1-chloropropane in the presence of water?
A.
Propane
B.
Propan-1-ol
C.
Propan-2-ol
D.
Chloropropane
Show solution
Solution
The hydrolysis of 1-chloropropane in the presence of water yields propan-1-ol as the main product.
Correct Answer:
B
— Propan-1-ol
Learn More →
Showing 1261 to 1290 of 2802 (94 Pages)
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!
