Major Competitive Exams

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Major Competitive Exams

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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!

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Q. How does the gravitational force between two objects change if the mass of one object is halved?

A. It doubles
B. It halves
C. It remains the same
D. It becomes zero

Solution

Gravitational force is directly proportional to the product of the masses. Halving one mass halves the force.

Correct Answer: B — It halves

Q. How does the gravitational potential change as you move away from a planet?

A. It increases.
B. It decreases.
C. It remains constant.
D. It oscillates.

Solution

The gravitational potential decreases as you move away from a planet.

Correct Answer: B — It decreases.

Q. How does the gravitational potential energy of a system of two masses change as they move closer together?

A. It increases.
B. It decreases.
C. It remains constant.
D. It becomes zero.

Solution

The gravitational potential energy decreases as the two masses move closer together.

Correct Answer: B — It decreases.

Q. How does the gravitational potential energy of an object change when it is lifted to a height 'h' above the ground?

A. It decreases.
B. It increases.
C. It remains the same.
D. It becomes zero.

Solution

The gravitational potential energy increases as the object is lifted to a height 'h' above the ground.

Correct Answer: B — It increases.

Q. How does the mixed graph challenge conventional wisdom about the two variables? (2023)

A. It confirms existing theories.
B. It provides new insights that contradict previous beliefs.
C. It shows no change in understanding.
D. It simplifies the relationship.

Solution

The graph provides new insights that challenge previously held beliefs about the relationship.

Correct Answer: B — It provides new insights that contradict previous beliefs.

Q. How does the mixed graph illustrate the concept of causation versus correlation? (2023)

A. It clearly shows that one variable causes the other.
B. It suggests that correlation does not imply causation.
C. It provides evidence for a causal relationship.
D. It does not address causation at all.

Solution

The graph indicates a correlation but does not provide evidence for causation.

Correct Answer: B — It suggests that correlation does not imply causation.

Q. How does the presence of a +M group affect the stability of a carbocation?

A. Increases stability
B. Decreases stability
C. No effect
D. Depends on the solvent

Solution

A +M group increases the stability of a carbocation by donating electron density through resonance.

Correct Answer: A — Increases stability

Q. How does the presence of a -I group affect the stability of a carbocation?

A. Increases stability
B. Decreases stability
C. No effect
D. Depends on the size of the group

Solution

A -I group decreases the stability of a carbocation by withdrawing electron density.

Correct Answer: B — Decreases stability

Q. How does the presence of constraints affect the potential energy of a system? (2022)

A. It increases potential energy
B. It decreases potential energy
C. It has no effect
D. It converts potential energy to kinetic energy

Solution

Constraints can limit the configurations of a system, often leading to a decrease in potential energy.

Correct Answer: B — It decreases potential energy

Q. How important is the conclusion in an essay for the UPSC Mains examination?

A. It is the least important part.
B. It summarizes the main points only.
C. It should introduce new ideas.
D. It reinforces the thesis and leaves a lasting impression.

Solution

The conclusion is crucial as it reinforces the main arguments and provides a final perspective, leaving a lasting impression on the examiner.

Correct Answer: D — It reinforces the thesis and leaves a lasting impression.

Q. How many atoms are in 2 moles of oxygen gas (O2)?

A. 6.022 x 10^23
B. 1.2044 x 10^24
C. 3.011 x 10^23
D. 12.044 x 10^23

Solution

Each O2 molecule has 2 oxygen atoms. Number of atoms = moles x Avogadro's number x 2 = 2 moles x 6.022 x 10^23 molecules/mole x 2 = 1.2044 x 10^24 atoms.

Correct Answer: B — 1.2044 x 10^24

Q. How many bits are there in a byte?

A. 4 bits
B. 8 bits
C. 16 bits
D. 32 bits

Solution

There are 8 bits in a byte.

Correct Answer: B — 8 bits

Q. How many bones are there in an adult human body?

A. 206
B. 201
C. 210
D. 215

Solution

An adult human body typically has 206 bones.

Correct Answer: A — 206

Q. How many categories are there in the Grammy Awards?

A. 50
B. 80
C. 100
D. 120

Solution

As of recent years, there are approximately 80 categories in the Grammy Awards, recognizing various genres and aspects of music.

Correct Answer: B — 80

Q. How many centimeters are there in a meter?

A. 10
B. 100
C. 1000
D. 10000

Solution

There are 100 centimeters in a meter.

Correct Answer: B — 100

Q. How many composite numbers are there between 1 and 10?

A. 4
B. 5
C. 6
D. 7

Solution

There are 4 composite numbers between 1 and 10: 4, 6, 8, 9, 10.

Correct Answer: B — 5

Q. How many countries are members of the European Union as of 2023?

A. 27
B. 28
C. 29
D. 30

Solution

As of 2023, there are 27 member countries in the European Union.

Correct Answer: A — 27

Q. How many countries are part of the North Atlantic Treaty Organization (NATO)?

A. 28
B. 30
C. 32
D. 34

Solution

NATO currently has 30 member countries.

Correct Answer: B — 30

Q. How many countries does India share its border with?

A. 5
B. 6
C. 7
D. 8

Solution

India shares its border with 7 countries: Pakistan, China, Nepal, Bhutan, Bangladesh, Myanmar, and Afghanistan.

Correct Answer: C — 7

Q. How many degrees of longitude correspond to a time difference of 1 hour? (2022)

A. 15°
B. 30°
C. 45°
D. 60°

Solution

1 hour corresponds to 15° of longitude since the Earth rotates 360° in 24 hours.

Correct Answer: A — 15°

Q. How many degrees of longitude correspond to a time difference of 2 hours?

A. 30°
B. 15°
C. 45°
D. 60°

Solution

A time difference of 1 hour corresponds to 15° of longitude, so 2 hours = 2 * 15° = 30°.

Correct Answer: B — 15°

Q. How many degrees of longitude correspond to a time difference of 4 hours? (2022)

A. 60 degrees
B. 45 degrees
C. 30 degrees
D. 15 degrees

Solution

A time difference of 4 hours corresponds to 4 * 15 = 60 degrees of longitude.

Correct Answer: A — 60 degrees

Q. How many different 4-digit PINs can be formed using the digits 0-9 if digits cannot be repeated?

A. 5040
B. 10000
C. 9000
D. 7200

Solution

The first digit can be any of 10 digits, the second can be any of 9, the third can be any of 8, and the fourth can be any of 7. Total = 10 * 9 * 8 * 7 = 5040.

Correct Answer: A — 5040

Q. How many different 4-digit PINs can be formed using the digits 0-9 if repetition is allowed? (2020)

A. 10000
B. 1000
C. 100
D. 1000

Solution

Each digit can be any of the 10 digits (0-9), so the total number of PINs is 10^4 = 10000.

Correct Answer: A — 10000

Q. How many different 4-digit PINs can be formed using the digits 0-9 without repetition?

A. 5040
B. 9000
C. 10000
D. 1000

Solution

The number of 4-digit PINs is P(10, 4) = 5040.

Correct Answer: A — 5040

Q. How many different ways can 2 out of 5 different fruits be chosen?

A. 10
B. 15
C. 20
D. 25

Solution

The number of ways to choose 2 from 5 is C(5, 2) = 10.

Correct Answer: A — 10

Q. How many different ways can 3 boys and 2 girls be seated in a row?

A. 30
B. 60
C. 120
D. 180

Solution

The number of ways to arrange 5 people is 5! = 120.

Correct Answer: C — 120

Q. How many different ways can 3 men and 2 women be seated in a row?

A. 60
B. 120
C. 30
D. 90

Solution

The number of arrangements of 5 people (3 men + 2 women) is 5! = 120.

Correct Answer: B — 120

Q. How many different ways can 3 red, 2 blue, and 1 green balls be arranged in a line?

A. 60
B. 120
C. 30
D. 10

Solution

The total arrangements = 6! / (3! * 2! * 1!) = 60.

Correct Answer: B — 120

Q. How many different ways can 4 different colored balls be arranged in a row? (2020)

A. 12
B. 24
C. 36
D. 48

Solution

The number of arrangements of 4 different colored balls is 4! = 24.

Correct Answer: B — 24

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