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. What is the specific heat at constant volume (Cv) for a monatomic ideal gas? (2019)

A. 3R/2
B. 5R/2
C. R
D. 2R

Solution

For a monatomic ideal gas, the specific heat at constant volume (Cv) is 3R/2.

Correct Answer: A — 3R/2

Q. What is the specific heat capacity at constant volume (Cv) for a monatomic ideal gas?

A. 3/2 R
B. 5/2 R
C. R
D. 2 R

Solution

The specific heat capacity at constant volume for a monatomic ideal gas is Cv = 3/2 R.

Correct Answer: A — 3/2 R

Q. What is the specific heat capacity of a substance if 500 J of heat is required to raise the temperature of 2 kg of the substance by 10°C? (2021)

A. 25 J/kg°C
B. 50 J/kg°C
C. 75 J/kg°C
D. 100 J/kg°C

Solution

Specific heat capacity (c) = Q / (m * ΔT) = 500 J / (2 kg * 10°C) = 25 J/kg°C.

Correct Answer: B — 50 J/kg°C

Q. What is the specific heat capacity of a substance if it requires 500 J to raise the temperature of 2 kg of the substance by 5°C? (2021)

A. 20 J/kg°C
B. 50 J/kg°C
C. 100 J/kg°C
D. 200 J/kg°C

Solution

Specific heat capacity (c) = Q / (m * ΔT) = 500 J / (2 kg * 5°C) = 50 J/kg°C.

Correct Answer: B — 50 J/kg°C

Q. What is the specific heat capacity of a substance if it requires 500 J to raise the temperature of 2 kg of the substance by 10°C? (2021)

A. 25 J/kg°C
B. 50 J/kg°C
C. 100 J/kg°C
D. 200 J/kg°C

Solution

Specific heat capacity (c) = Q / (m * ΔT) = 500 J / (2 kg * 10°C) = 25 J/kg°C.

Correct Answer: B — 50 J/kg°C

Q. What is the specific heat capacity of a substance if it takes 500 J to raise the temperature of 2 kg of the substance by 5°C? (2021)

A. 20 J/kg°C
B. 50 J/kg°C
C. 100 J/kg°C
D. 200 J/kg°C

Solution

Specific heat capacity (c) = Q / (m * ΔT) = 500 J / (2 kg * 5°C) = 50 J/kg°C

Correct Answer: B — 50 J/kg°C

Q. What is the specific heat capacity of a substance?

A. The amount of heat required to change its temperature by 1 degree Celsius
B. The amount of heat required to change its state
C. The heat required to raise the temperature of a unit mass by 1 degree Celsius
D. The heat required to cool a substance

Solution

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of a unit mass by 1 degree Celsius.

Correct Answer: C — The heat required to raise the temperature of a unit mass by 1 degree Celsius

Q. What is the specific heat capacity of air at constant pressure? (2022)

A. 1.005 J/kg·K
B. 0.718 J/kg·K
C. 4.186 J/kg·K
D. 2.093 J/kg·K

Solution

The specific heat capacity of air at constant pressure is approximately 1.005 J/kg·K.

Correct Answer: A — 1.005 J/kg·K

Q. What is the specific heat capacity of air? (2022)

A. 1.005 J/kg·K
B. 4.18 J/kg·K
C. 2.09 J/kg·K
D. 0.9 J/kg·K

Solution

The specific heat capacity of air is approximately 1.005 J/kg·K.

Correct Answer: A — 1.005 J/kg·K

Q. What is the specific heat capacity of iron? (2023)

A. 0.45 J/g·K
B. 1.00 J/g·K
C. 2.00 J/g·K
D. 4.18 J/g·K

Solution

The specific heat capacity of iron is approximately 0.45 J/g·K.

Correct Answer: A — 0.45 J/g·K

Q. What is the specific heat capacity of water at constant pressure (C_p)? (2020)

A. 4.18 J/g°C
B. 2.09 J/g°C
C. 1.00 J/g°C
D. 3.00 J/g°C

Solution

The specific heat capacity of water at constant pressure is approximately 4.18 J/g°C.

Correct Answer: A — 4.18 J/g°C

Q. What is the specific heat capacity of water if 500 J of heat is required to raise the temperature of 100 g of water by 5°C?

A. 1 J/g°C
B. 2 J/g°C
C. 4 J/g°C
D. 5 J/g°C

Solution

Specific heat capacity (c) = Q / (m * ΔT) = 500 J / (100 g * 5°C) = 1 J/g°C.

Correct Answer: A — 1 J/g°C

Q. What is the specific heat capacity of water if it takes 4200 J to raise the temperature of 1 kg of water by 1°C? (2021)

A. 2100 J/kg°C
B. 4200 J/kg°C
C. 8400 J/kg°C
D. 1000 J/kg°C

Solution

The specific heat capacity of water is defined as the amount of heat required to raise the temperature of 1 kg of water by 1°C, which is given as 4200 J/kg°C.

Correct Answer: B — 4200 J/kg°C

Q. What is the specific heat capacity of water?

A. 1 J/g°C
B. 4.18 J/g°C
C. 2 J/g°C
D. 0.5 J/g°C

Solution

The specific heat capacity of water is approximately 4.18 J/g°C.

Correct Answer: B — 4.18 J/g°C

Q. What is the specific heat capacity of water? (2021) 2021

A. 1 J/g°C
B. 4.18 J/g°C
C. 2 J/g°C
D. 0.9 J/g°C

Solution

The specific heat capacity of water is approximately 4.18 J/g°C.

Correct Answer: B — 4.18 J/g°C

Q. What is the speed of a wave on a string if the tension is 100 N and the mass per unit length is 0.5 kg/m?

A. 20 m/s
B. 10 m/s
C. 5 m/s
D. 15 m/s

Solution

The speed v of a wave on a string is given by v = √(T/μ), where T is the tension and μ is the mass per unit length. Here, v = √(100/0.5) = √200 = 10 m/s.

Correct Answer: A — 20 m/s

Q. What is the speed of a wave on a string if the tension is 100 N and the mass per unit length is 2 kg/m?

A. 5 m/s
B. 10 m/s
C. 15 m/s
D. 20 m/s

Solution

The speed of a wave on a string is given by the formula v = sqrt(T/μ), where T is the tension and μ is the mass per unit length. Here, v = sqrt(100/2) = sqrt(50) = 10 m/s.

Correct Answer: B — 10 m/s

Q. What is the speed of light in a medium with a refractive index of 1.5?

A. 2 x 10^8 m/s
B. 3 x 10^8 m/s
C. 1.5 x 10^8 m/s
D. 1 x 10^8 m/s

Solution

The speed of light in a medium is given by c/n. Therefore, speed = 3 x 10^8 / 1.5 = 2 x 10^8 m/s.

Correct Answer: A — 2 x 10^8 m/s

Q. What is the speed of light in a vacuum (in km/s)?

A. 300,000
B. 150,000
C. 450,000
D. 600,000

Solution

The speed of light in a vacuum is approximately 300,000 km/s.

Correct Answer: A — 300,000

Q. What is the speed of light in a vacuum?

A. 3 x 10^8 m/s
B. 3 x 10^6 m/s
C. 3 x 10^5 m/s
D. 3 x 10^7 m/s

Solution

The speed of light in a vacuum is approximately 3 x 10^8 m/s.

Correct Answer: A — 3 x 10^8 m/s

Q. What is the speed of light in vacuum? (2020)

A. 3 x 10^8 m/s
B. 3 x 10^6 m/s
C. 3 x 10^7 m/s
D. 3 x 10^9 m/s

Solution

The speed of light in vacuum is approximately 3 x 10^8 m/s.

Correct Answer: A — 3 x 10^8 m/s

Q. What is the speed of sound in air at 20°C?

A. 343 m/s
B. 330 m/s
C. 300 m/s
D. 350 m/s

Solution

The speed of sound in air at 20°C is approximately 343 m/s.

Correct Answer: A — 343 m/s

Q. What is the speed of sound in air at room temperature (20°C)?

A. 343 m/s
B. 300 m/s
C. 1500 m/s
D. 1200 m/s

Solution

The speed of sound in air at 20°C is approximately 343 m/s.

Correct Answer: A — 343 m/s

Q. What is the spin quantum number (m_s) for an electron in an orbital?

A. 0
B. +1/2
C. -1/2
D. 1

Solution

The spin quantum number can be +1/2 or -1/2 for an electron in an orbital.

Correct Answer: B — +1/2

Q. What is the spin quantum number (m_s) for an electron with a clockwise spin?

A. -1/2
B. 0
C. +1/2
D. 1

Solution

The spin quantum number (m_s) is +1/2 for an electron with clockwise spin.

Correct Answer: C — +1/2

Q. What is the spin quantum number (m_s) for an electron?

A. 0
B. +1/2
C. -1/2
D. Both +1/2 and -1/2

Solution

The spin quantum number (m_s) can be +1/2 or -1/2 for an electron.

Correct Answer: D — Both +1/2 and -1/2

Q. What is the square of the modulus of the complex number 1 + 2i? (2014)

A. 5
B. 4
C. 1
D. 2

Solution

The modulus is √(1^2 + 2^2) = √(1 + 4) = √5. The square of the modulus is 5.

Correct Answer: A — 5

Q. What is the square of the modulus of the complex number 1 + i? (2020)

A. 2
B. 1
C. 0
D. 4

Solution

The modulus is √(1^2 + 1^2) = √2, and the square of the modulus is 2.

Correct Answer: A — 2

Q. What is the square root of 64? (2020)

A. 6
B. 7
C. 8
D. 9

Solution

The square root of 64 is 8.

Correct Answer: C — 8

Q. What is the square root of the complex number -1? (2021)

A. i
B. -i
C. 1
D. 0

Solution

The square root of -1 is defined as i.

Correct Answer: A — i

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