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. Which gas is primarily absorbed by plants during photosynthesis?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Plants absorb carbon dioxide from the atmosphere during photosynthesis, which is then used to produce glucose.
Correct Answer:
B
— Carbon dioxide
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Q. Which gas is primarily responsible for global warming?
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Argon
Show solution
Solution
Carbon Dioxide is the gas primarily responsible for global warming due to its greenhouse effect.
Correct Answer:
B
— Carbon Dioxide
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Q. Which gas is primarily responsible for the depletion of the ozone layer?
A.
Carbon Dioxide
B.
Chlorofluorocarbons
C.
Methane
D.
Nitrous Oxide
Show solution
Solution
Chlorofluorocarbons (CFCs) are primarily responsible for the depletion of the ozone layer.
Correct Answer:
B
— Chlorofluorocarbons
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Q. Which gas is primarily responsible for the drive to breathe in healthy individuals? (2023)
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Carbon dioxide levels in the blood primarily drive the urge to breathe; high levels stimulate the respiratory centers in the brain.
Correct Answer:
B
— Carbon dioxide
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Q. Which gas is primarily responsible for the greenhouse effect?
A.
Oxygen
B.
Nitrogen
C.
Carbon Dioxide
D.
Hydrogen
Show solution
Solution
Carbon Dioxide (CO2) is primarily responsible for the greenhouse effect, trapping heat in the atmosphere.
Correct Answer:
C
— Carbon Dioxide
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Q. Which gas is primarily responsible for the regulation of breathing rate? (2022)
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Carbon dioxide levels in the blood are the primary factor that regulates the rate of breathing.
Correct Answer:
B
— Carbon dioxide
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Q. Which gas is primarily taken in by plants during photosynthesis?
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Plants primarily take in carbon dioxide during photosynthesis, which is used to produce glucose.
Correct Answer:
B
— Carbon Dioxide
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Q. Which gas is produced during the electrolysis of water? (2020) 2020
A.
Oxygen
B.
Nitrogen
C.
Carbon Dioxide
D.
Hydrogen
Show solution
Solution
During the electrolysis of water, oxygen is produced at the anode.
Correct Answer:
A
— Oxygen
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Q. Which gas is produced during the electrolysis of water? (2022)
A.
Oxygen
B.
Nitrogen
C.
Carbon Dioxide
D.
Hydrogen
Show solution
Solution
During the electrolysis of water, oxygen is produced at the anode.
Correct Answer:
A
— Oxygen
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Q. Which gas is produced during the reaction of an acid with a carbonate?
A.
Oxygen
B.
Hydrogen
C.
Carbon dioxide
D.
Nitrogen
Show solution
Solution
The reaction of an acid with a carbonate produces carbon dioxide gas.
Correct Answer:
C
— Carbon dioxide
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Q. Which gas is produced when an acid reacts with a carbonate?
A.
Oxygen
B.
Carbon dioxide
C.
Hydrogen
D.
Nitrogen
Show solution
Solution
The reaction of an acid with a carbonate produces carbon dioxide gas.
Correct Answer:
B
— Carbon dioxide
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Q. Which gas is produced when an acid reacts with a metal? (2022)
A.
Oxygen
B.
Hydrogen
C.
Carbon dioxide
D.
Nitrogen
Show solution
Solution
Hydrogen gas is produced when an acid reacts with a metal.
Correct Answer:
B
— Hydrogen
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Q. Which gas is produced when an acid reacts with a metal? (2023) 2023
A.
Oxygen
B.
Hydrogen
C.
Nitrogen
D.
Carbon Dioxide
Show solution
Solution
When an acid reacts with a metal, hydrogen gas is produced.
Correct Answer:
B
— Hydrogen
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Q. Which gas is produced when hydrochloric acid reacts with sodium bicarbonate? (2020)
A.
Oxygen
B.
Carbon Dioxide
C.
Hydrogen
D.
Nitrogen
Show solution
Solution
The reaction between hydrochloric acid (HCl) and sodium bicarbonate (NaHCO3) produces carbon dioxide (CO2) as one of the products.
Correct Answer:
B
— Carbon Dioxide
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Q. Which gas is released as a byproduct of photosynthesis? (2022)
A.
Carbon dioxide
B.
Oxygen
C.
Nitrogen
D.
Methane
Show solution
Solution
Oxygen is released as a byproduct of photosynthesis during the light-dependent reactions.
Correct Answer:
B
— Oxygen
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Q. Which gas is released during the process of respiration in plants? (2022)
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Carbon dioxide is released as a byproduct during the process of respiration in plants.
Correct Answer:
B
— Carbon dioxide
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Q. Which gas law combines Boyle's and Charles's laws?
A.
Avogadro's Law
B.
Ideal Gas Law
C.
Dalton's Law
D.
Graham's Law
Show solution
Solution
The ideal gas law combines Boyle's and Charles's laws, relating pressure, volume, and temperature of an ideal gas.
Correct Answer:
B
— Ideal Gas Law
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Q. Which gas law describes the relationship between pressure, volume, and temperature?
A.
Boyle's Law
B.
Charles's Law
C.
Avogadro's Law
D.
Ideal Gas Law
Show solution
Solution
The Ideal Gas Law describes the relationship between pressure, volume, and temperature of a gas.
Correct Answer:
D
— Ideal Gas Law
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Q. Which gas law relates pressure and temperature at constant volume?
A.
Boyle's Law
B.
Charles's Law
C.
Avogadro's Law
D.
Gay-Lussac's Law
Show solution
Solution
Gay-Lussac's Law relates pressure and temperature at constant volume.
Correct Answer:
D
— Gay-Lussac's Law
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Q. Which gas law relates pressure and temperature of a gas at constant volume?
A.
Boyle's Law
B.
Charles's Law
C.
Gay-Lussac's Law
D.
Avogadro's Law
Show solution
Solution
Gay-Lussac's Law states that the pressure of a gas is directly proportional to its temperature at constant volume.
Correct Answer:
C
— Gay-Lussac's Law
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Q. Which gas law relates pressure, volume, and temperature of an ideal gas?
A.
Boyle's Law
B.
Charles's Law
C.
Ideal Gas Law
D.
Avogadro's Law
Show solution
Solution
The Ideal Gas Law (PV = nRT) relates pressure, volume, and temperature of an ideal gas.
Correct Answer:
C
— Ideal Gas Law
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Q. Which gas law relates the pressure, volume, and temperature of a gas?
A.
Boyle's Law
B.
Charles's Law
C.
Ideal Gas Law
D.
Avogadro's Law
Show solution
Solution
The Ideal Gas Law (PV = nRT) relates pressure, volume, and temperature of an ideal gas.
Correct Answer:
C
— Ideal Gas Law
Learn More →
Q. Which gas law relates the pressure, volume, and temperature of an ideal gas?
A.
Boyle's Law
B.
Charles's Law
C.
Ideal Gas Law
D.
Avogadro's Law
Show solution
Solution
The Ideal Gas Law (PV = nRT) relates pressure, volume, and temperature of an ideal gas.
Correct Answer:
C
— Ideal Gas Law
Learn More →
Q. Which gas law relates the volume and temperature of a gas at constant pressure?
A.
Boyle's Law
B.
Charles's Law
C.
Avogadro's Law
D.
Graham's Law
Show solution
Solution
Charles's Law states that the volume of a gas is directly proportional to its temperature at constant pressure.
Correct Answer:
B
— Charles's Law
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Q. Which gas law relates volume and temperature at constant pressure?
A.
Boyle's Law
B.
Charles's Law
C.
Avogadro's Law
D.
Ideal Gas Law
Show solution
Solution
Charles's Law states that the volume of a gas is directly proportional to its temperature at constant pressure.
Correct Answer:
B
— Charles's Law
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Q. Which gas law states that the volume of a gas is directly proportional to its temperature at constant pressure?
A.
Boyle's Law
B.
Charles's Law
C.
Gay-Lussac's Law
D.
Avogadro's Law
Show solution
Solution
Charles's Law states that the volume of a gas is directly proportional to its temperature at constant pressure.
Correct Answer:
B
— Charles's Law
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Q. Which gas law states that the volume of a gas is directly proportional to the number of moles at constant temperature and pressure?
A.
Boyle's Law
B.
Charles's Law
C.
Avogadro's Law
D.
Graham's Law
Show solution
Solution
Avogadro's Law states that the volume of a gas is directly proportional to the number of moles at constant temperature and pressure.
Correct Answer:
C
— Avogadro's Law
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Q. Which gas would have the highest root mean square speed at the same temperature? (2019)
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
Show solution
Solution
Hydrogen (H2) has the lowest molar mass among the given gases, thus it has the highest root mean square speed at the same temperature.
Correct Answer:
C
— Hydrogen (H2)
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Q. Which gate can be used to create a NOT operation using only NAND gates?
A.
Two NAND gates
B.
One NAND gate
C.
Three NAND gates
D.
Four NAND gates
Show solution
Solution
A NOT operation can be created using two NAND gates.
Correct Answer:
A
— Two NAND gates
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Q. Which gate can be used to invert the output of an AND gate?
A.
OR Gate
B.
NAND Gate
C.
XOR Gate
D.
NOT Gate
Show solution
Solution
A NAND gate inverts the output of an AND gate.
Correct Answer:
B
— NAND Gate
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