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 opposite of 'vivid'?
A.
Dull
B.
Bright
C.
Clear
D.
Lively
Show solution
Solution
'Dull' is the opposite of 'vivid', which means producing powerful feelings or strong, clear images.
Correct Answer:
A
— Dull
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Q. What is the orbital speed of a satellite in a circular orbit at a height h above the Earth's surface?
A.
sqrt(GM/R^2)
B.
sqrt(GM/(R+h)^2)
C.
sqrt(GM/(R-h)^2)
D.
sqrt(GM/R)
Show solution
Solution
The orbital speed v of a satellite in a circular orbit is given by v = sqrt(GM/(R+h)^2), where G is the gravitational constant, M is the mass of the Earth, R is the radius of the Earth, and h is the height of the satellite above the Earth's surface.
Correct Answer:
B
— sqrt(GM/(R+h)^2)
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Q. What is the orbital speed of a satellite in a low Earth orbit (LEO) approximately 2000 km above the Earth's surface? (2000)
A.
7.9 km/s
B.
11.2 km/s
C.
5.0 km/s
D.
3.0 km/s
Show solution
Solution
The orbital speed of a satellite in low Earth orbit is approximately 7.9 km/s.
Correct Answer:
A
— 7.9 km/s
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Q. What is the order of a matrix with 3 rows and 4 columns? (2021)
A.
3x4
B.
4x3
C.
3x3
D.
4x4
Show solution
Solution
The order of a matrix is given by the number of rows followed by the number of columns. Therefore, a matrix with 3 rows and 4 columns is of order 3x4.
Correct Answer:
A
— 3x4
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Q. What is the order of the first bright fringe in a single-slit diffraction pattern?
A.
m = 0
B.
m = 1
C.
m = 2
D.
m = 3
Show solution
Solution
In single-slit diffraction, the central maximum corresponds to m = 0, which is the first bright fringe.
Correct Answer:
A
— m = 0
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Q. What is the order of the reaction if the rate constant has the unit L/mol·s?
A.
Zero order
B.
First order
C.
Second order
D.
Third order
Show solution
Solution
If the rate constant has the unit L/mol·s, the reaction is second order.
Correct Answer:
C
— Second order
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Q. What is the osmotic pressure of a 0.2 M NaCl solution at 25 °C? (R = 0.0821 L atm/(K mol))
A.
4.92 atm
B.
2.46 atm
C.
1.23 atm
D.
0.61 atm
Show solution
Solution
Osmotic pressure = iCRT = 2 * 0.2 * 0.0821 * 298 = 4.92 atm (i = 2 for NaCl)
Correct Answer:
A
— 4.92 atm
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Q. What is the osmotic pressure of a 0.5 M NaCl solution at 25°C? (R = 0.0821 L·atm/(K·mol)) (2023)
A.
12.3 atm
B.
6.15 atm
C.
3.07 atm
D.
1.54 atm
Show solution
Solution
Osmotic pressure (π) = iCRT = 2 * 0.5 * 0.0821 * 298 = 24.5 atm. Therefore, π = 6.15 atm.
Correct Answer:
B
— 6.15 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L atm/K mol) (2020)
A.
2.06 atm
B.
0.82 atm
C.
1.01 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L atm/K mol)(298 K) = 2.06 atm.
Correct Answer:
A
— 2.06 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 L of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.03 atm
B.
1.96 atm
C.
0.82 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L·atm/(K·mol))(298 K) = 2.03 atm.
Correct Answer:
A
— 2.03 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.5 atm
B.
0.82 atm
C.
1.0 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 moles * 0.0821 * 298) / 1 = 2.5 atm.
Correct Answer:
A
— 2.5 atm
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Q. What is the osmotic pressure of a solution containing 0.2 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
4.92 atm
B.
1.64 atm
C.
0.82 atm
D.
2.46 atm
Show solution
Solution
Osmotic pressure = (n/V)RT = (0.2/1) * 0.0821 * 298 = 4.92 atm.
Correct Answer:
A
— 4.92 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of glucose in 1 liter of water at 25 °C?
A.
12.3 atm
B.
24.6 atm
C.
6.1 atm
D.
3.1 atm
Show solution
Solution
Osmotic pressure (π) = iCRT = 1 * 0.5 * 0.0821 * 298 = 12.3 atm.
Correct Answer:
A
— 12.3 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
12.3 atm
B.
0.5 atm
C.
1.0 atm
D.
2.5 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 mol)(0.0821 L·atm/(K·mol))(298 K) = 12.3 atm.
Correct Answer:
A
— 12.3 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of glucose in 1 L of water at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
12.3 atm
B.
1.23 atm
C.
0.5 atm
D.
2.5 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles * 0.0821 * 298) / 1 = 12.3 atm.
Correct Answer:
B
— 1.23 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of glucose in 1 L of solution at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
12.3 atm
B.
10.2 atm
C.
8.2 atm
D.
6.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles)(0.0821 L·atm/(K·mol))(298 K) = 12.3 atm.
Correct Answer:
A
— 12.3 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of glucose in 2 liters of solution? (R = 0.0821 L·atm/(K·mol), T = 298 K)
A.
6.14 atm
B.
12.28 atm
C.
3.07 atm
D.
1.54 atm
Show solution
Solution
Osmotic pressure (π) = (n/V)RT = (0.5/2) * 0.0821 * 298 = 6.14 atm.
Correct Answer:
A
— 6.14 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of glucose in 2 liters of solution at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
6.13 atm
B.
12.26 atm
C.
3.07 atm
D.
1.54 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles)(0.0821 L·atm/(K·mol))(298 K) / 2 L = 6.13 atm.
Correct Answer:
A
— 6.13 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2021)
A.
12.3 atm
B.
10.2 atm
C.
8.2 atm
D.
6.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 12.3 atm.
Correct Answer:
B
— 10.2 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (2021)
A.
12.3 atm
B.
24.6 atm
C.
6.1 atm
D.
3.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles)(0.0821 L·atm/(K·mol))(298 K) = 12.3 atm.
Correct Answer:
B
— 24.6 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 2 liters of solution at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
10.25 atm
B.
5.12 atm
C.
2.03 atm
D.
1.23 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles * 0.0821 * 298) / 2 = 12.21 atm.
Correct Answer:
B
— 5.12 atm
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Q. What is the osmotic pressure of a solution containing 1 mole of glucose in 2 liters of solution at 25 °C? (R = 0.0821 L·atm/(K·mol))
A.
0.41 atm
B.
0.82 atm
C.
1.23 atm
D.
1.64 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (1 mol)(0.0821 L·atm/(K·mol))(298 K) / 2 L = 0.82 atm.
Correct Answer:
B
— 0.82 atm
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Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (2021)
A.
0.0821 atm
B.
1.0 atm
C.
2.0 atm
D.
4.0 atm
Show solution
Solution
Osmotic pressure (π) = iCRT = 1 * 2 * 0.0821 * 298 = 4.0 atm (i = 1 for glucose).
Correct Answer:
C
— 2.0 atm
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Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
0.82 atm
B.
1.64 atm
C.
2.46 atm
D.
4.92 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (2 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 4.92 atm.
Correct Answer:
B
— 1.64 atm
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Q. What is the osmotic pressure of a solution directly proportional to?
A.
Temperature
B.
Concentration of solute
C.
Volume of solvent
D.
Both A and B
Show solution
Solution
Osmotic pressure is directly proportional to both the temperature and the concentration of solute.
Correct Answer:
D
— Both A and B
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Q. What is the outermost layer of a plant stem called? (2022)
A.
Cortex
B.
Epidermis
C.
Phloem
D.
Xylem
Show solution
Solution
The outermost layer of a plant stem is called the epidermis, which protects the plant from environmental damage.
Correct Answer:
B
— Epidermis
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Q. What is the outermost layer of cells in a plant called? (2023)
A.
Cortex
B.
Epidermis
C.
Phloem
D.
Xylem
Show solution
Solution
The outermost layer of cells in a plant is called the epidermis, which protects the plant from environmental damage.
Correct Answer:
B
— Epidermis
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Q. What is the outermost whorl of a flower called? (2023)
A.
Calyx
B.
Corolla
C.
Androecium
D.
Gynoecium
Show solution
Solution
The outermost whorl of a flower is called the calyx, which is made up of sepals.
Correct Answer:
A
— Calyx
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Q. What is the output of a NAND gate when both inputs are high?
A.
0
B.
1
C.
Undefined
D.
Depends on the circuit
Show solution
Solution
A NAND gate outputs 0 only when both inputs are 1. Therefore, if both inputs are high (1), the output is 0.
Correct Answer:
A
— 0
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Q. What is the output of a NAND gate when both inputs are true?
A.
True
B.
False
C.
Undefined
D.
Depends on the circuit
Show solution
Solution
A NAND gate outputs false when both inputs are true.
Correct Answer:
B
— False
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