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. What is the volume of 1 mole of an ideal gas at STP (Standard Temperature and Pressure)?
A.
22.4 L
B.
24.0 L
C.
18.0 L
D.
20.0 L
Show solution
Solution
At STP, 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer:
A
— 22.4 L
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Q. What is the volume of 1 mole of an ideal gas at STP?
A.
22.4 L
B.
24 L
C.
10 L
D.
1 L
Show solution
Solution
At STP (Standard Temperature and Pressure), 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer:
A
— 22.4 L
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Q. What is the volume of 1 mole of an ideal gas at STP? (2019) 2019
A.
22.4 L
B.
24 L
C.
1 L
D.
10 L
Show solution
Solution
At STP, 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer:
A
— 22.4 L
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Q. What is the volume of 1 mole of gas at STP?
A.
22.4 L
B.
24 L
C.
20 L
D.
18 L
Show solution
Solution
At STP, 1 mole of gas occupies 22.4 liters.
Correct Answer:
A
— 22.4 L
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Q. What is the volume of 4 moles of an ideal gas at STP?
A.
22.4 L
B.
44.8 L
C.
89.6 L
D.
112 L
Show solution
Solution
Volume = moles x volume per mole = 4 moles x 22.4 L/mole = 89.6 L.
Correct Answer:
C
— 89.6 L
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Q. What is the volume of a 2 M NaOH solution needed to obtain 4 moles of NaOH? (2021) 2021
A.
2 L
B.
1 L
C.
0.5 L
D.
4 L
Show solution
Solution
Volume (L) = moles / molarity = 4 moles / 2 M = 2 L.
Correct Answer:
A
— 2 L
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Q. What is the volume of a 2 M solution that contains 4 moles of solute?
A.
2 L
B.
4 L
C.
1 L
D.
0.5 L
Show solution
Solution
Volume = moles of solute / molarity = 4 moles / 2 M = 2 L.
Correct Answer:
B
— 4 L
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Q. What is the volume of a cube with a side length of 2 meters?
A.
4 m³
B.
6 m³
C.
8 m³
D.
10 m³
Show solution
Solution
Volume = side³ = 2³ = 8 m³.
Correct Answer:
C
— 8 m³
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Q. What is the volume of a cube with a side length of 3 cm?
A.
9 cm³
B.
18 cm³
C.
27 cm³
D.
36 cm³
Show solution
Solution
The volume of a cube is given by side³, so 3 cm³ = 27 cm³.
Correct Answer:
C
— 27 cm³
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Q. What is the volume of a cube with a side length of 4 cm?
A.
16 cm³
B.
32 cm³
C.
64 cm³
D.
80 cm³
Show solution
Solution
The volume of a cube is given by V = a³. Here, V = 4³ = 64 cm³.
Correct Answer:
C
— 64 cm³
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Q. What is the volume of a cube with a side length of 4 units?
A.
16 cubic units
B.
64 cubic units
C.
32 cubic units
D.
48 cubic units
Show solution
Solution
Volume = side^3 = 4^3 = 64 cubic units.
Correct Answer:
B
— 64 cubic units
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Q. What is the volume of a cube with a side length of 5 cm? (2022)
A.
25 cm³
B.
50 cm³
C.
125 cm³
D.
150 cm³
Show solution
Solution
The volume of a cube is given by V = side³. For a side length of 5 cm, V = 5³ = 125 cm³.
Correct Answer:
C
— 125 cm³
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Q. What is the volume of a cube with a side length of 6 cm?
A.
36 cm³
B.
72 cm³
C.
216 cm³
D.
144 cm³
Show solution
Solution
Volume = a³ = 6³ = 216 cm³.
Correct Answer:
C
— 216 cm³
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Q. What is the volume of a cube with side length 3 units? (2023)
Show solution
Solution
Volume = side³ = 3³ = 27 cubic units.
Correct Answer:
B
— 27
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Q. What is the volume of a cube with side length 4 cm?
A.
16 cm³
B.
64 cm³
C.
32 cm³
D.
48 cm³
Show solution
Solution
Volume = side³ = 4 cm × 4 cm × 4 cm = 64 cm³.
Correct Answer:
B
— 64 cm³
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Q. What is the volume of a cube with side length 4 units? (2020)
Show solution
Solution
Volume = side³ = 4³ = 64 cubic units.
Correct Answer:
B
— 64
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Q. What is the volume of a cylinder with a radius of 3 cm and a height of 10 cm? (Use π = 3.14) (2021)
A.
28.26 cm³
B.
84.78 cm³
C.
94.2 cm³
D.
100.5 cm³
Show solution
Solution
Volume = πr²h = 3.14 * (3)² * 10 = 3.14 * 9 * 10 = 282.6 cm³.
Correct Answer:
B
— 84.78 cm³
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Q. What is the volume of a cylinder with radius 2 and height 5? (2023)
A.
20π
B.
10π
C.
15π
D.
25π
Show solution
Solution
Volume = πr²h = π(2²)(5) = 20π cubic units.
Correct Answer:
A
— 20π
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Q. What is the volume of a cylinder with radius 3 units and height 5 units? (2021)
A.
45π
B.
30π
C.
15π
D.
9π
Show solution
Solution
Volume = πr²h = π(3²)(5) = 45π cubic units.
Correct Answer:
A
— 45π
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Q. What is the volume of a pyramid with a base area of 20 cm² and a height of 9 cm?
A.
60 cm³
B.
80 cm³
C.
90 cm³
D.
100 cm³
Show solution
Solution
Volume = (1/3) * base area * height = (1/3) * 20 * 9 = 60 cm³
Correct Answer:
B
— 80 cm³
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Q. What is the volume of a rectangular prism with length 5 cm, width 3 cm, and height 2 cm?
A.
30 cm³
B.
25 cm³
C.
20 cm³
D.
15 cm³
Show solution
Solution
Volume = lwh = 5 * 3 * 2 = 30 cm³
Correct Answer:
A
— 30 cm³
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Q. What is the volume of a sphere with radius 5 units? (2021)
A.
500/3π
B.
125/3π
C.
100/3π
D.
200/3π
Show solution
Solution
Volume = (4/3)πr³ = (4/3)π(5)³ = (4/3)π(125) = 500/3π cubic units.
Correct Answer:
A
— 500/3π
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Q. What is the volume of CO2 produced at STP when 2 moles of C2H5OH are completely combusted?
A.
22.4 L
B.
44.8 L
C.
67.2 L
D.
89.6 L
Show solution
Solution
C2H5OH + 3O2 → 2CO2 + 3H2O. 2 moles of C2H5OH produce 4 moles of CO2. Volume = 4 * 22.4 L = 89.6 L.
Correct Answer:
B
— 44.8 L
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Q. What is the volume percent concentration of a solution containing 30 mL of ethanol in 150 mL of solution?
A.
20%
B.
25%
C.
30%
D.
15%
Show solution
Solution
Volume percent = (volume of solute / total volume) x 100 = (30 mL / 150 mL) x 100 = 20%.
Correct Answer:
B
— 25%
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Q. What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?
A.
30%
B.
70%
C.
50%
D.
20%
Show solution
Solution
Volume percent = (volume of solute / total volume) × 100 = (30 mL / (30 mL + 70 mL)) × 100 = 30%.
Correct Answer:
A
— 30%
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Q. What is the wavelength of a photon with a frequency of 5 x 10^14 Hz?
A.
6 x 10^-7 m
B.
3 x 10^-7 m
C.
1 x 10^-6 m
D.
4 x 10^-7 m
Show solution
Solution
Using the formula λ = c/f, where c = 3 x 10^8 m/s, λ = 3 x 10^8 / (5 x 10^14) = 6 x 10^-7 m.
Correct Answer:
A
— 6 x 10^-7 m
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Q. What is the wavelength of a photon with a frequency of 6 x 10^14 Hz?
A.
5 x 10^-7 m
B.
3 x 10^-7 m
C.
6 x 10^-7 m
D.
1 x 10^-6 m
Show solution
Solution
Wavelength λ = c/f = (3 x 10^8 m/s) / (6 x 10^14 Hz) = 5 x 10^-7 m.
Correct Answer:
A
— 5 x 10^-7 m
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Q. What is the wavelength of an electron accelerated through a potential difference of 100 V? (mass of electron = 9.11 x 10^-31 kg)
A.
1.22 x 10^-10 m
B.
1.23 x 10^-9 m
C.
1.24 x 10^-11 m
D.
1.25 x 10^-12 m
Show solution
Solution
The wavelength λ = h/p = h/sqrt(2meV) = (6.63 x 10^-34)/sqrt(2 * 9.11 x 10^-31 * 100) = 1.22 x 10^-10 m.
Correct Answer:
A
— 1.22 x 10^-10 m
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Q. What is the wavelength of light emitted when an electron transitions from n=3 to n=2 in a hydrogen atom?
A.
410 nm
B.
656 nm
C.
486 nm
D.
434 nm
Show solution
Solution
Using the Rydberg formula, the wavelength for the transition from n=3 to n=2 is approximately 434 nm.
Correct Answer:
D
— 434 nm
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Q. What is the wavelength of light emitted when an electron transitions from n=3 to n=1 in a hydrogen atom? (2020)
A.
102.6 nm
B.
656.3 nm
C.
486.1 nm
D.
434.0 nm
Show solution
Solution
Using the Rydberg formula, the wavelength for the transition from n=3 to n=1 can be calculated to be approximately 102.6 nm.
Correct Answer:
A
— 102.6 nm
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