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 Ksp expression for the salt AgCl? (2023)

A. [Ag+][Cl-]
B. [AgCl]
C. [Ag+][Cl-]^2
D. [AgCl]^2

Solution

The solubility product constant (Ksp) for AgCl is expressed as Ksp = [Ag+][Cl-], where [Ag+] and [Cl-] are the molar concentrations of the ions in a saturated solution.

Correct Answer: A — [Ag+][Cl-]

Q. What is the Ksp of AgCl if the solubility of AgCl in water is 1.0 x 10^-5 M?

A. 1.0 x 10^-10
B. 1.0 x 10^-5
C. 1.0 x 10^-15
D. 1.0 x 10^-20

Solution

Ksp = [Ag+][Cl-] = (1.0 x 10^-5)(1.0 x 10^-5) = 1.0 x 10^-10.

Correct Answer: A — 1.0 x 10^-10

Q. What is the Ksp of AgCl if the solubility of AgCl in water is 1.33 x 10^-5 M? (2023)

A. 1.78 x 10^-10
B. 1.33 x 10^-5
C. 1.33 x 10^-10
D. 1.78 x 10^-5

Solution

Ksp = [Ag+][Cl-] = (1.33 x 10^-5)(1.33 x 10^-5) = 1.78 x 10^-10.

Correct Answer: A — 1.78 x 10^-10

Q. What is the largest desert in the world? (2022)

A. Sahara
B. Arabian
C. Gobi
D. Antarctic

Solution

The largest desert in the world is the Antarctic Desert.

Correct Answer: D — Antarctic

Q. What is the largest mammal in the world?

A. Elephant
B. Blue Whale
C. Giraffe
D. Great White Shark

Solution

The Blue Whale is the largest mammal in the world.

Correct Answer: B — Blue Whale

Q. What is the largest organ in the human body? (2020)

A. Heart
B. Liver
C. Skin
D. Lungs

Solution

The largest organ in the human body is the skin.

Correct Answer: C — Skin

Q. What is the largest planet in our solar system? (2023)

A. Earth
B. Mars
C. Jupiter
D. Saturn

Solution

Jupiter is the largest planet in our solar system.

Correct Answer: C — Jupiter

Q. What is the latent heat of fusion for ice?

A. 334 J/g
B. 2260 J/g
C. 4190 J/g
D. 1000 J/g

Solution

The latent heat of fusion for ice is approximately 334 J/g.

Correct Answer: A — 334 J/g

Q. What is the latent heat of fusion if 2000 J of energy is required to melt 0.5 kg of ice? (2021)

A. 2000 J/kg
B. 4000 J/kg
C. 1000 J/kg
D. 500 J/kg

Solution

Latent heat of fusion (L) = Q / m = 2000 J / 0.5 kg = 4000 J/kg.

Correct Answer: A — 2000 J/kg

Q. What is the latent heat of fusion if 2000 J of heat is required to melt 500 g of ice? (2022)

A. 2000 J/kg
B. 4000 J/kg
C. 1000 J/kg
D. 3000 J/kg

Solution

Latent heat of fusion (L) = Q/m = 2000 J / 0.5 kg = 4000 J/kg.

Correct Answer: A — 2000 J/kg

Q. What is the latent heat of fusion if 500 g of ice at 0°C absorbs 334,000 J of heat? (2022)

A. 334 J/g
B. 668 J/g
C. 500 J/g
D. 1000 J/g

Solution

Latent heat of fusion (L) = Q / m = 334,000 J / 500 g = 668 J/g.

Correct Answer: A — 334 J/g

Q. What is the latent heat of fusion of ice if 80 calories are required to melt 20 grams of ice? (2020)

A. 40 cal/g
B. 60 cal/g
C. 80 cal/g
D. 100 cal/g

Solution

Latent heat of fusion (L_f) = Q / m = 80 cal / 20 g = 4 cal/g.

Correct Answer: C — 80 cal/g

Q. What is the latent heat of fusion of ice if 80 g of ice at 0°C melts to water at 0°C, absorbing 2400 J of heat? (2022)

A. 30 J/g
B. 40 J/g
C. 50 J/g
D. 60 J/g

Solution

Latent heat of fusion (L) = Q/m = 2400 J / 80 g = 30 J/g.

Correct Answer: B — 40 J/g

Q. What is the latent heat of fusion of ice if 80 g of ice at 0°C melts to water at 0°C, absorbing 3360 J of heat? (2022)

A. 40 J/g
B. 60 J/g
C. 80 J/g
D. 100 J/g

Solution

Latent heat of fusion (L) = Q/m = 3360 J / 80 g = 42 J/g.

Correct Answer: C — 80 J/g

Q. What is the latent heat of fusion?

A. Heat required to change a solid to a liquid
B. Heat required to change a liquid to a gas
C. Heat required to change a gas to a solid
D. Heat required to change a liquid to a solid

Solution

Latent heat of fusion is the heat required to change a solid into a liquid at its melting point.

Correct Answer: A — Heat required to change a solid to a liquid

Q. What is the latent heat of vaporization if 500 g of water at 100°C is converted to steam at the same temperature, absorbing 2260 kJ of heat? (2023)

A. 2260 J/g
B. 450 J/g
C. 334 J/g
D. 1000 J/g

Solution

Latent heat of vaporization (L) = Q / m = 2260 kJ / 500 g = 4.52 kJ/g = 2260 J/g.

Correct Answer: A — 2260 J/g

Q. What is the latent heat of vaporization of water if 540 J of energy is required to convert 100 g of water at 100°C to steam? (2021)

A. 540 J/g
B. 54 J/g
C. 5.4 J/g
D. 0.54 J/g

Solution

Latent heat of vaporization (L) = Q/m = 540 J / 100 g = 5.4 J/g.

Correct Answer: A — 540 J/g

Q. What is the latitude of the North Pole?

A. 0°
B. 90°N
C. 90°S
D. 45°N

Solution

The North Pole is located at 90°N latitude.

Correct Answer: B — 90°N

Q. What is the latus rectum of the parabola given by the equation y^2 = 12x?

A. 3
B. 4
C. 6
D. 12

Solution

The latus rectum of a parabola y^2 = 4px is given by 4p. Here, 4p = 12, so p = 3, and the latus rectum is 4p = 12.

Correct Answer: C — 6

Q. What is the LCM of 14 and 35?

A. 70
B. 140
C. 105
D. 50

Solution

The LCM of 14 and 35 is 70, as it is the smallest number that is a multiple of both.

Correct Answer: A — 70

Q. What is the LCM of 8, 12, and 16?

A. 48
B. 96
C. 24
D. 32

Solution

The LCM of 8, 12, and 16 is 48, as it is the smallest number that is a multiple of all three.

Correct Answer: B — 96

Q. What is the LCM of 9, 12, and 15?

A. 180
B. 360
C. 540
D. 720

Solution

The LCM of 9, 12, and 15 is 180, as it is the smallest number that is a multiple of all three.

Correct Answer: A — 180

Q. What is the leading coefficient of the polynomial 7x^4 - 3x^3 + 2x - 1?

A. 7
B. -3
C. 2
D. -1

Solution

The leading coefficient is the coefficient of the term with the highest degree, which is 7 in this case.

Correct Answer: A — 7

Q. What is the leading coefficient of the polynomial 7x^5 - 2x^3 + 4x - 1?

A. 7
B. -2
C. 4
D. -1

Solution

The leading coefficient of a polynomial is the coefficient of the term with the highest degree, which is 7 in this case.

Correct Answer: A — 7

Q. What is the leading coefficient of the polynomial p(x) = -5x^4 + 3x^2 - 2?

A. -5
B. 3
C. -2
D. 0

Solution

The leading coefficient of a polynomial is the coefficient of the term with the highest degree, which in this case is -5.

Correct Answer: A — -5

Q. What is the least common multiple (LCM) of 4 and 5?

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

Solution

The LCM of 4 and 5 is 20, as it is the smallest number that both 4 and 5 divide evenly into.

Correct Answer: C — 20

Q. What is the least common multiple (LCM) of 4 and 6? (2021)

A. 12
B. 24
C. 6
D. 8

Solution

LCM of 4 and 6 is 12.

Correct Answer: A — 12

Q. What is the least common multiple (LCM) of 8 and 12?

A. 24
B. 48
C. 36
D. 60

Solution

The LCM of 8 and 12 is 24, as it is the smallest number that both 8 and 12 divide into evenly.

Correct Answer: A — 24

Q. What is the least count of a standard vernier caliper? (2021)

A. 0.01 cm
B. 0.1 cm
C. 1 cm
D. 0.001 cm

Solution

The least count of a standard vernier caliper is typically 0.01 cm.

Correct Answer: A — 0.01 cm

Q. What is the least count of a vernier caliper that can measure up to 0.01 cm? (2021)

A. 0.1 cm
B. 0.01 cm
C. 0.001 cm
D. 1 cm

Solution

The least count of a vernier caliper is the smallest measurement it can accurately read, which is 0.01 cm in this case.

Correct Answer: B — 0.01 cm

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