Q. What happens to the equilibrium constant when a reaction is reversed?
A.
It remains the same
B.
It doubles
C.
It is inverted
D.
It is halved
Show solution
Solution
When a reaction is reversed, the equilibrium constant is inverted (1/K).
Correct Answer:
C
— It is inverted
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Q. What happens to the equilibrium position when a catalyst is added to a reaction at equilibrium? (2023)
A.
Shifts to the right
B.
Shifts to the left
C.
No change
D.
Increases Kc
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Solution
A catalyst speeds up both the forward and reverse reactions equally, thus it does not change the position of equilibrium or the value of Kc.
Correct Answer:
C
— No change
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Q. What happens to the Fermi level in a p-type semiconductor compared to an intrinsic semiconductor?
A.
Moves up
B.
Moves down
C.
Remains the same
D.
Becomes zero
Show solution
Solution
In a p-type semiconductor, the Fermi level moves up towards the valence band due to the increased hole concentration.
Correct Answer:
A
— Moves up
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Q. What happens to the focal length of a lens when it is immersed in a medium with a higher refractive index than the lens material?
A.
Focal length increases
B.
Focal length decreases
C.
Focal length remains the same
D.
Focal length becomes infinite
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Solution
When a lens is immersed in a medium with a higher refractive index, its effective focal length decreases due to the reduced refractive power.
Correct Answer:
B
— Focal length decreases
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Q. What happens to the focal length of a lens when it is immersed in water?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes infinite
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Solution
The focal length of a lens decreases when immersed in a medium with a higher refractive index than air.
Correct Answer:
B
— Decreases
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Q. What happens to the freezing point of a solvent when a non-volatile solute is added?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It fluctuates
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Solution
The freezing point of a solvent decreases when a non-volatile solute is added, a phenomenon known as freezing point depression.
Correct Answer:
B
— It decreases
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Q. What happens to the frequency of a damped oscillator as damping increases?
A.
Frequency increases
B.
Frequency decreases
C.
Frequency remains the same
D.
Frequency becomes zero
Show solution
Solution
As damping increases, the frequency of the damped oscillator decreases.
Correct Answer:
B
— Frequency decreases
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Q. What happens to the frequency of oscillation in a damped system compared to an undamped system?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It becomes zero
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Solution
The frequency of oscillation in a damped system is lower than that of an undamped system due to energy loss.
Correct Answer:
B
— It decreases
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Q. What happens to the fringe pattern in Young's double-slit experiment if the distance to the screen is halved?
A.
Fringe width increases
B.
Fringe width decreases
C.
Fringe separation remains the same
D.
Fringe visibility decreases
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Solution
Fringe width (β) is inversely proportional to the distance to the screen (D). If D is halved, the fringe width decreases.
Correct Answer:
B
— Fringe width decreases
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Q. What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?
A.
It shows maximum current
B.
It shows minimum current
C.
It shows zero current
D.
It shows fluctuating current
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Solution
When the Wheatstone bridge is balanced, the potential difference across the galvanometer is zero, resulting in zero current.
Correct Answer:
C
— It shows zero current
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Q. What happens to the gravitational force between two masses if one mass is tripled?
A.
It triples
B.
It doubles
C.
It remains the same
D.
It increases by a factor of 9
Show solution
Solution
The gravitational force is directly proportional to the product of the masses. If one mass is tripled, the force also triples.
Correct Answer:
A
— It triples
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Q. What happens to the gravitational force between two masses if the distance between them is tripled?
A.
It triples
B.
It becomes one-third
C.
It becomes one-ninth
D.
It remains the same
Show solution
Solution
The gravitational force is inversely proportional to the square of the distance. If the distance is tripled, the force becomes 1/(3^2) = 1/9 of the original force.
Correct Answer:
C
— It becomes one-ninth
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Q. What happens to the gravitational force between two objects if one object's mass is tripled?
A.
It triples
B.
It halves
C.
It remains the same
D.
It increases by a factor of 9
Show solution
Solution
The gravitational force is directly proportional to the product of the masses. If one mass is tripled, the force also triples.
Correct Answer:
A
— It triples
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Q. What happens to the gravitational force between two objects if the mass of one object is tripled?
A.
It becomes three times stronger
B.
It becomes six times stronger
C.
It becomes nine times stronger
D.
It remains the same
Show solution
Solution
The gravitational force is directly proportional to the product of the masses, so tripling one mass triples the force.
Correct Answer:
A
— It becomes three times stronger
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Q. What happens to the gravitational force if the mass of one object is tripled?
A.
It becomes three times stronger
B.
It becomes six times stronger
C.
It remains the same
D.
It becomes nine times stronger
Show solution
Solution
The gravitational force is directly proportional to the product of the masses, so tripling one mass triples the force.
Correct Answer:
A
— It becomes three times stronger
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Q. What happens to the gravitational force on a satellite as it moves further away from the Earth?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
The gravitational force on a satellite decreases as it moves further away from the Earth, following the inverse square law.
Correct Answer:
B
— It decreases
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Q. What happens to the gravitational force on a satellite as it moves to a higher orbit?
A.
It increases.
B.
It decreases.
C.
It remains constant.
D.
It becomes zero.
Show solution
Solution
The gravitational force on a satellite decreases as it moves to a higher orbit due to the inverse square law of gravitation.
Correct Answer:
B
— It decreases.
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Q. What happens to the gravitational force on a satellite if its altitude is doubled?
A.
It doubles
B.
It remains the same
C.
It becomes four times weaker
D.
It becomes eight times weaker
Show solution
Solution
The gravitational force decreases with the square of the distance from the center of the Earth. If the altitude is doubled, the distance from the center of the Earth becomes R + 2h, and the force becomes weaker by a factor of four.
Correct Answer:
C
— It becomes four times weaker
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Q. What happens to the gravitational potential as you move away from a mass?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
Show solution
Solution
The gravitational potential decreases as you move away from a mass.
Correct Answer:
B
— It decreases
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Q. What happens to the gravitational potential as you move away from a massive body?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
Show solution
Solution
The gravitational potential decreases as you move away from a massive body.
Correct Answer:
B
— It decreases
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Q. What happens to the gravitational potential energy of a satellite as it moves further away from the Earth?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
As a satellite moves further away from the Earth, its gravitational potential energy increases because it is moving to a higher potential.
Correct Answer:
A
— It increases
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Q. What happens to the gravitational potential energy of a satellite as it moves to a higher orbit?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
As a satellite moves to a higher orbit, its gravitational potential energy increases due to the increase in distance from the Earth.
Correct Answer:
A
— It increases
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Q. What happens to the gravitational potential energy of an object as it moves away from the Earth?
A.
It increases.
B.
It decreases.
C.
It remains constant.
D.
It becomes zero.
Show solution
Solution
As an object moves away from the Earth, its gravitational potential energy increases.
Correct Answer:
A
— It increases.
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Q. What happens to the gravitational potential energy of an object as it moves away from a planet?
A.
It increases.
B.
It decreases.
C.
It remains constant.
D.
It becomes zero.
Show solution
Solution
As an object moves away from a planet, its gravitational potential energy increases (becomes less negative).
Correct Answer:
A
— It increases.
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Q. What happens to the image distance when the object distance is doubled in a concave mirror? (2023)
A.
It remains the same
B.
It doubles
C.
It triples
D.
It halves
Show solution
Solution
In a concave mirror, if the object distance is doubled, the image distance also changes according to the mirror formula, leading to a doubling effect.
Correct Answer:
B
— It doubles
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Q. What happens to the image distance when the object distance is increased in a convex lens? (2022)
A.
Image distance decreases
B.
Image distance increases
C.
Image distance remains the same
D.
Image distance becomes negative
Show solution
Solution
As the object distance increases in a convex lens, the image distance also increases, moving further away from the lens.
Correct Answer:
B
— Image distance increases
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Q. What happens to the image distance when the object is moved closer to a concave mirror? (2021)
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes negative
Show solution
Solution
As the object moves closer to a concave mirror, the image distance increases, and the image becomes larger and more distant.
Correct Answer:
A
— Increases
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Q. What happens to the image distance when the object is moved closer to a convex lens beyond its focal point?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes negative
Show solution
Solution
As the object moves closer, the image distance increases.
Correct Answer:
A
— Increases
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Q. What happens to the image distance when the object is moved closer to a convex lens than its focal length? (2023)
A.
Image distance increases
B.
Image distance decreases
C.
Image distance remains the same
D.
Image cannot be formed
Show solution
Solution
As the object is moved closer to the focal point of a convex lens, the image distance increases and the image becomes larger and virtual.
Correct Answer:
A
— Image distance increases
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Q. What happens to the image formed by a concave lens when the object is placed at infinity?
A.
Real and inverted
B.
Virtual and upright
C.
Real and upright
D.
No image formed
Show solution
Solution
When an object is placed at infinity, a concave lens forms a virtual image at its focal point, which is upright.
Correct Answer:
B
— Virtual and upright
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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!
