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 of the following quantities has the dimension of [M^1 L^2 T^-2]?
A.
Pressure
B.
Energy
C.
Force
D.
Work
Show solution
Solution
Energy has the dimension of [M^1 L^2 T^-2].
Correct Answer:
B
— Energy
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Q. Which of the following quantities has the dimension of [M⁰L²T⁻²]?
A.
Energy
B.
Force
C.
Power
D.
Work
Show solution
Solution
Energy and work both have the same dimensions of [M⁰L²T⁻²], as they are equivalent.
Correct Answer:
A
— Energy
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Q. Which of the following quantities has the dimension [M^0 L^0 T^0]?
A.
Mass
B.
Time
C.
Length
D.
Angle
Show solution
Solution
Angle is a dimensionless quantity and has the dimension [M^0 L^0 T^0].
Correct Answer:
D
— Angle
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Q. Which of the following quantities has the dimension [M^0 L^0 T^1]? (2022)
A.
Speed
B.
Time
C.
Force
D.
Energy
Show solution
Solution
Time has the dimension [M^0 L^0 T^1].
Correct Answer:
B
— Time
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Q. Which of the following quantities has the dimension [M^0 L^1 T^-1]?
A.
Velocity
B.
Acceleration
C.
Force
D.
Pressure
Show solution
Solution
Velocity has the dimension [M^0 L^1 T^-1], as it is defined as distance per unit time.
Correct Answer:
A
— Velocity
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Q. Which of the following quantities has the dimension [M^1 L^2 T^-2]?
A.
Energy
B.
Force
C.
Pressure
D.
Power
Show solution
Solution
Energy has the dimension [M^1 L^2 T^-2].
Correct Answer:
A
— Energy
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Q. Which of the following quantities is a scalar?
A.
Velocity
B.
Force
C.
Acceleration
D.
Temperature
Show solution
Solution
Temperature is a scalar quantity as it has magnitude but no direction, while velocity, force, and acceleration are vector quantities.
Correct Answer:
D
— Temperature
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Q. Which of the following quantities is a vector? (2019)
A.
Speed
B.
Distance
C.
Displacement
D.
Mass
Show solution
Solution
Displacement is a vector quantity as it has both magnitude and direction, while speed, distance, and mass are scalar quantities.
Correct Answer:
C
— Displacement
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Q. Which of the following quantities is conserved in a closed system of rotating bodies?
A.
Linear momentum
B.
Angular momentum
C.
Kinetic energy
D.
All of the above
Show solution
Solution
In a closed system, angular momentum is conserved, while linear momentum and kinetic energy may not be.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is conserved in a closed system with no external torques?
A.
Linear momentum
B.
Angular momentum
C.
Energy
D.
All of the above
Show solution
Solution
In a closed system with no external torques, angular momentum is conserved.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is conserved in a closed system with no external torques acting on it?
A.
Angular momentum
B.
Linear momentum
C.
Energy
D.
All of the above
Show solution
Solution
In a closed system with no external torques, angular momentum is conserved.
Correct Answer:
A
— Angular momentum
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Q. Which of the following quantities is conserved in an isolated system when no external torques act?
A.
Linear momentum
B.
Angular momentum
C.
Both linear and angular momentum
D.
Neither
Show solution
Solution
In an isolated system with no external torques, angular momentum is conserved.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is conserved in an isolated system? (2023)
A.
Energy
B.
Momentum
C.
Mass
D.
All of the above
Show solution
Solution
In an isolated system, energy, momentum, and mass are all conserved.
Correct Answer:
D
— All of the above
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Q. Which of the following quantities is conserved in the absence of external torques?
A.
Linear momentum
B.
Angular momentum
C.
Energy
D.
All of the above
Show solution
Solution
In the absence of external torques, angular momentum is conserved.
Correct Answer:
B
— Angular momentum
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Q. Which of the following quantities is dimensionally consistent with energy?
A.
Force x Distance
B.
Mass x Acceleration
C.
Pressure x Volume
D.
All of the above
Show solution
Solution
All the options are dimensionally consistent with energy, as they can be expressed in terms of [M^1 L^2 T^-2].
Correct Answer:
D
— All of the above
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Q. Which of the following quantities is dimensionless?
A.
Reynolds number
B.
Force
C.
Energy
D.
Pressure
Show solution
Solution
Reynolds number is dimensionless as it is a ratio of inertial forces to viscous forces.
Correct Answer:
A
— Reynolds number
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Q. Which of the following quantities is measured in Joules?
A.
Work
B.
Power
C.
Energy
D.
Both Work and Energy
Show solution
Solution
Both work and energy are measured in Joules (J) in the SI system.
Correct Answer:
D
— Both Work and Energy
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Q. Which of the following quantities is not a scalar? (2021)
A.
Mass
B.
Temperature
C.
Velocity
D.
Speed
Show solution
Solution
Velocity is a vector quantity as it has both magnitude and direction, while mass, temperature, and speed are scalar quantities.
Correct Answer:
C
— Velocity
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Q. Which of the following quantum numbers can have a negative value?
Show solution
Solution
The magnetic quantum number (m_l) can take negative values, ranging from -l to +l.
Correct Answer:
C
— m_l
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Q. Which of the following quantum numbers can have a value of 0?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The azimuthal quantum number (l) can have a value of 0, which corresponds to an s orbital.
Correct Answer:
B
— Azimuthal quantum number
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Q. Which of the following quantum numbers can never be negative?
Show solution
Solution
The principal quantum number n can never be negative; it starts from 1.
Correct Answer:
A
— n
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Q. Which of the following quantum numbers cannot be negative?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m_l)
D.
Spin quantum number (m_s)
Show solution
Solution
The principal quantum number (n) is always a positive integer (1, 2, 3, ...).
Correct Answer:
A
— Principal quantum number (n)
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Q. Which of the following quantum numbers cannot be the same for two electrons in the same atom?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
According to the Pauli Exclusion Principle, no two electrons in an atom can have the same set of all four quantum numbers.
Correct Answer:
D
— Spin quantum number
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Q. Which of the following quantum numbers describes the orientation of an orbital?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The magnetic quantum number describes the orientation of an orbital in space.
Correct Answer:
C
— Magnetic quantum number
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Q. Which of the following quantum numbers describes the shape of an atomic orbital? (2022)
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The azimuthal quantum number (l) describes the shape of the atomic orbital.
Correct Answer:
B
— Azimuthal quantum number
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Q. Which of the following quantum numbers describes the shape of an orbital?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The azimuthal quantum number (l) determines the shape of the orbital.
Correct Answer:
B
— Azimuthal quantum number
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Q. Which of the following quantum numbers describes the shape of an orbital? (2020) 2020
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The azimuthal quantum number (l) describes the shape of an orbital.
Correct Answer:
B
— Azimuthal quantum number
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Q. Which of the following quantum numbers is associated with the orientation of an orbital?
Show solution
Solution
The magnetic quantum number (m_l) describes the orientation of an orbital.
Correct Answer:
C
— m_l
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Q. Which of the following quantum numbers is not associated with the electron spin?
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Solution
The principal quantum number n is not associated with electron spin; it describes the energy level.
Correct Answer:
A
— n
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Q. Which of the following quantum numbers is not associated with the electron's energy level?
Show solution
Solution
The spin quantum number (m_s) does not affect the energy level of the electron.
Correct Answer:
D
— m_s
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