Major Competitive Exams MCQ & Objective Questions
Major Competitive Exams play a crucial role in shaping the academic and professional futures of students in India. These exams not only assess knowledge but also test problem-solving skills and time management. Practicing MCQs and objective questions is essential for scoring better, as they help in familiarizing students with the exam format and identifying important questions that frequently appear in tests.
What You Will Practise Here
Key concepts and theories related to major subjects
Important formulas and their applications
Definitions of critical terms and terminologies
Diagrams and illustrations to enhance understanding
Practice questions that mirror actual exam patterns
Strategies for solving objective questions efficiently
Time management techniques for competitive exams
Exam Relevance
The topics covered under Major Competitive Exams are integral to various examinations such as CBSE, State Boards, NEET, and JEE. Students can expect to encounter a mix of conceptual and application-based questions that require a solid understanding of the subjects. Common question patterns include multiple-choice questions that test both knowledge and analytical skills, making it essential to be well-prepared with practice MCQs.
Common Mistakes Students Make
Rushing through questions without reading them carefully
Overlooking the negative marking scheme in MCQs
Confusing similar concepts or terms
Neglecting to review previous years’ question papers
Failing to manage time effectively during the exam
FAQs
Question: How can I improve my performance in Major Competitive Exams?Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Question: What types of questions should I focus on for these exams?Answer: Concentrate on important Major Competitive Exams questions that frequently appear in past papers and mock tests.
Question: Are there specific strategies for tackling objective questions?Answer: Yes, practicing under timed conditions and reviewing mistakes can help develop effective strategies.
Start your journey towards success by solving practice MCQs today! Test your understanding and build confidence for your upcoming exams. Remember, consistent practice is the key to mastering Major Competitive Exams!
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
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Q. What is the primary use of insulin produced through recombinant DNA technology? (2022)
A.
To treat diabetes
B.
To enhance growth in livestock
C.
To improve crop yield
D.
To produce biofuels
Show solution
Solution
Insulin produced through recombinant DNA technology is primarily used to treat diabetes by regulating blood sugar levels.
Correct Answer:
A
— To treat diabetes
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Q. What is the primary use of lithium in batteries? (2023)
A.
As a conductor
B.
As a cathode material
C.
As an anode material
D.
As an electrolyte
Show solution
Solution
Lithium is primarily used as an anode material in lithium-ion batteries due to its high electrochemical potential.
Correct Answer:
C
— As an anode material
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Q. What is the primary use of magnesium in industries? (2021)
A.
Construction
B.
Aerospace
C.
Electronics
D.
Pharmaceuticals
Show solution
Solution
Magnesium is primarily used in the aerospace industry due to its lightweight and strength.
Correct Answer:
B
— Aerospace
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Q. What is the primary use of magnesium in industry? (2023)
A.
Construction
B.
Aerospace
C.
Electronics
D.
Pharmaceuticals
Show solution
Solution
Magnesium is primarily used in construction and aerospace industries due to its lightweight and strength.
Correct Answer:
B
— Aerospace
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Q. What is the primary use of nuclear fission in power plants?
A.
To produce nuclear weapons
B.
To generate heat for electricity
C.
To create isotopes for medical use
D.
To study nuclear reactions
Show solution
Solution
Nuclear fission is primarily used in power plants to generate heat, which is then converted into electricity.
Correct Answer:
B
— To generate heat for electricity
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Q. What is the primary use of nuclear fission?
A.
Medical imaging
B.
Nuclear power generation
C.
Smoke detectors
D.
Radiocarbon dating
Show solution
Solution
Nuclear fission is primarily used for nuclear power generation.
Correct Answer:
B
— Nuclear power generation
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Q. What is the primary use of nuclear reactors?
A.
To produce nuclear weapons
B.
To generate electricity
C.
To create isotopes for medical use
D.
To study nuclear physics
Show solution
Solution
The primary use of nuclear reactors is to generate electricity through controlled nuclear fission.
Correct Answer:
B
— To generate electricity
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Q. What is the primary use of polarizers in photography?
A.
To increase brightness
B.
To reduce glare
C.
To enhance colors
D.
To focus light
Show solution
Solution
Polarizers are primarily used in photography to reduce glare from reflective surfaces.
Correct Answer:
B
— To reduce glare
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Q. What is the primary use of polyethylene?
A.
Insulation
B.
Packaging
C.
Textiles
D.
Adhesives
Show solution
Solution
Polyethylene is primarily used in packaging due to its flexibility and durability.
Correct Answer:
B
— Packaging
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Q. What is the primary use of polystyrene?
A.
Insulation
B.
Packaging
C.
Textiles
D.
Adhesives
Show solution
Solution
Polystyrene is widely used in packaging materials due to its lightweight and cushioning properties.
Correct Answer:
B
— Packaging
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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
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Q. What is the primary use of radioactive isotopes in medicine?
A.
Energy production
B.
Diagnostic imaging
C.
Food preservation
D.
Industrial applications
Show solution
Solution
Radioactive isotopes are primarily used in medicine for diagnostic imaging and treatment.
Correct Answer:
B
— Diagnostic imaging
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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
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Q. What is the primary use of sodium bicarbonate (NaHCO3)? (2020)
A.
Baking
B.
Cleaning
C.
Medicine
D.
All of the above
Show solution
Solution
Sodium bicarbonate is used in baking, cleaning, and medicine, making it versatile.
Correct Answer:
D
— All of the above
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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
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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
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Q. What is the primary use of sulfuric acid (H2SO4) in industry? (2019)
A.
Fertilizer production
B.
Battery acid
C.
Cleaning agent
D.
Food preservative
Show solution
Solution
Sulfuric acid is primarily used in the production of fertilizers.
Correct Answer:
A
— Fertilizer production
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Q. What is the primary use of sulfuric acid (H2SO4)? (2022)
A.
Fertilizer
B.
Battery acid
C.
Detergent
D.
Food preservative
Show solution
Solution
Sulfuric acid is primarily used as battery acid in lead-acid batteries.
Correct Answer:
B
— Battery acid
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Q. What is the primary use of sulfuric acid in the industry? (2023)
A.
Fertilizer production
B.
Battery acid
C.
Detergent manufacturing
D.
Food preservation
Show solution
Solution
Sulfuric acid is primarily used as battery acid in lead-acid batteries.
Correct Answer:
B
— Battery acid
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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
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Q. What is the primary use of titanium dioxide (TiO2)? (2023)
A.
Pigment
B.
Catalyst
C.
Semiconductor
D.
Reagent
Show solution
Solution
Titanium dioxide (TiO2) is primarily used as a white pigment in paints and coatings.
Correct Answer:
A
— Pigment
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Q. What is the principal quantum number for an electron in the 4th shell?
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Solution
The principal quantum number (n) corresponds to the shell number. For the 4th shell, n=4.
Correct Answer:
D
— 4
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Q. What is the principal quantum number for an electron in the 5d subshell?
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Solution
The principal quantum number n for the 5d subshell is 5.
Correct Answer:
C
— 5
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Q. What is the principal quantum number for an electron in the ground state of a hydrogen atom?
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Solution
The ground state of a hydrogen atom corresponds to n=1.
Correct Answer:
B
— 1
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Q. What is the principal quantum number for an electron in the third energy level? (2019)
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Solution
The principal quantum number (n) indicates the energy level; for the third energy level, n = 3.
Correct Answer:
C
— 3
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Q. What is the principal quantum number for the outermost electron in sodium (Na)? (2022) 2022
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Solution
Sodium has an atomic number of 11, and its outermost electron is in the 3rd shell, so n=3.
Correct Answer:
C
— 3
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Q. What is the principal quantum number for the outermost electrons in sodium (Na)? (2023) 2023
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Solution
Sodium has the electronic configuration of 1s² 2s² 2p⁶ 3s¹, so the principal quantum number for the outermost electrons is 3.
Correct Answer:
C
— 3
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Q. What is the principal quantum number of an electron in the 3p orbital?
Show solution
Solution
The principal quantum number (n) indicates the energy level of an electron. For a 3p orbital, n = 3.
Correct Answer:
C
— 3
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Q. What is the principal quantum number of an electron in the 4s orbital?
Show solution
Solution
The principal quantum number (n) indicates the energy level of an electron. For the 4s orbital, n = 4.
Correct Answer:
C
— 4
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