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 percentage error if the measured value is 20 and the true value is 25? (2021)
A.
20%
B.
25%
C.
5%
D.
10%
Show solution
Solution
Percentage error is calculated as (|True Value - Measured Value| / True Value) * 100 = (|25 - 20| / 25) * 100 = 20%.
Correct Answer:
D
— 10%
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Q. What is the percentage error if the measured value is 20.0 and the true value is 19.5? (2021)
A.
2.56%
B.
1.25%
C.
3.33%
D.
5.00%
Show solution
Solution
Percentage error = (|Measured - True| / True) × 100 = (|20.0 - 19.5| / 19.5) × 100 ≈ 2.56%.
Correct Answer:
A
— 2.56%
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Q. What is the percentage error if the true value is 50 and the measured value is 48? (2022)
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Solution
Percentage error = |(True value - Measured value) / True value| * 100 = |(50 - 48) / 50| * 100 = 4%.
Correct Answer:
A
— 4%
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Q. What is the percentage increase in sales from Q1 to Q2 as per the chart?
A.
5%
B.
10%
C.
15%
D.
20%
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Solution
The chart shows a percentage increase of 20% in sales from Q1 to Q2.
Correct Answer:
D
— 20%
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Q. What is the percentage increase in sales from Q1 to Q2?
A.
15%
B.
25%
C.
35%
D.
45%
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Solution
Sales increased from 200 in Q1 to 250 in Q2, which is a 25% increase.
Correct Answer:
B
— 25%
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Q. What is the percentage increase in sales of Product A from Q1 to Q3?
A.
20%
B.
25%
C.
30%
D.
35%
Show solution
Solution
The percentage increase in sales of Product A from Q1 to Q3 is 25%.
Correct Answer:
B
— 25%
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Q. What is the perimeter of a rectangle with a length of 8 units and a width of 3 units?
A.
22 units
B.
24 units
C.
20 units
D.
18 units
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Solution
Perimeter = 2 * (length + width) = 2 * (8 + 3) = 22 units.
Correct Answer:
A
— 22 units
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Q. What is the perimeter of a rectangle with length 10 cm and width 5 cm? (2021)
A.
30 cm
B.
25 cm
C.
20 cm
D.
15 cm
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Solution
The perimeter of a rectangle is given by P = 2(length + width). Here, P = 2(10 + 5) = 30 cm.
Correct Answer:
B
— 25 cm
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Q. What is the perimeter of a rectangle with length 8 units and width 3 units?
A.
22 units
B.
24 units
C.
20 units
D.
18 units
Show solution
Solution
Perimeter = 2 * (length + width) = 2 * (8 + 3) = 22 units.
Correct Answer:
A
— 22 units
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Q. What is the perimeter of a right triangle with legs of lengths 5 and 12?
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Solution
First, find the hypotenuse: c = √(5² + 12²) = √(25 + 144) = √169 = 13. Perimeter = 5 + 12 + 13 = 30.
Correct Answer:
A
— 30
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Q. What is the perimeter of a right triangle with legs of lengths 9 and 12?
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Solution
Hypotenuse = √(9² + 12²) = √(81 + 144) = √225 = 15. Perimeter = 9 + 12 + 15 = 36.
Correct Answer:
B
— 32
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Q. What is the perimeter of a square with a side length of 4 cm?
A.
8 cm
B.
12 cm
C.
16 cm
D.
20 cm
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Solution
Perimeter of a square = 4 × side = 4 × 4 cm = 16 cm.
Correct Answer:
C
— 16 cm
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Q. What is the perimeter of a square with a side length of 6 cm? (2019)
A.
24 cm
B.
20 cm
C.
18 cm
D.
30 cm
Show solution
Solution
Perimeter = 4 * Side = 4 * 6 cm = 24 cm.
Correct Answer:
A
— 24 cm
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Q. What is the perimeter of an equilateral triangle with each side measuring 8 cm? (2021)
A.
16 cm
B.
24 cm
C.
32 cm
D.
20 cm
Show solution
Solution
The perimeter of an equilateral triangle is 3 times the length of one side. Therefore, perimeter = 3 * 8 = 24 cm.
Correct Answer:
B
— 24 cm
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Q. What is the period number of Argon? (2020)
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Solution
Argon is located in Period 3 of the periodic table.
Correct Answer:
C
— 4
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Q. What is the period number of Lithium in the periodic table? (2022)
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Solution
Lithium is located in period 2 of the periodic table.
Correct Answer:
B
— 2
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Q. What is the period number of Lithium? (2016) 2016
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Solution
Lithium is located in period 2 of the periodic table.
Correct Answer:
B
— 2
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Q. What is the period number of Sodium in the periodic table? (2017)
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Solution
Sodium is in period 3 of the periodic table.
Correct Answer:
C
— 3
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Q. What is the period number of the element with atomic number 20?
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Solution
The element with atomic number 20 is Calcium, which is in period 4.
Correct Answer:
C
— 4
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Q. What is the period of a pendulum that is 1 meter long?
A.
1 s
B.
2 s
C.
0.5 s
D.
3 s
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Solution
The period T of a simple pendulum is given by T = 2π√(L/g). For L = 1 m and g ≈ 9.8 m/s², T = 2π√(1/9.8) ≈ 2 s.
Correct Answer:
B
— 2 s
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Q. What is the period of a satellite in a circular orbit at a height of 300 km above the Earth's surface?
A.
90 minutes
B.
60 minutes
C.
120 minutes
D.
30 minutes
Show solution
Solution
The period of a satellite in a circular orbit at a height of 300 km is approximately 90 minutes.
Correct Answer:
A
— 90 minutes
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Q. What is the period of a satellite in a low Earth orbit (LEO) compared to a satellite in a geostationary orbit?
A.
Longer than a geostationary orbit
B.
Shorter than a geostationary orbit
C.
Equal to a geostationary orbit
D.
Depends on the mass of the satellite
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Solution
Satellites in low Earth orbit have a much shorter orbital period compared to geostationary satellites due to their proximity to Earth.
Correct Answer:
B
— Shorter than a geostationary orbit
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Q. What is the periodic trend for electronegativity across a period?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Varies irregularly
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Solution
Electronegativity increases across a period from left to right.
Correct Answer:
A
— Increases
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Q. What is the pH level of pure water? (2020)
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Solution
The pH level of pure water is 7, which is considered neutral.
Correct Answer:
B
— 7
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Q. What is the pH of a 0.001 M acetic acid solution (Ka = 1.8 x 10^-5)?
A.
2.87
B.
3.87
C.
4.87
D.
5.87
Show solution
Solution
Using the formula for weak acids, pH = 0.5(pKa - logC) = 0.5(4.74 - log(0.001)) = 3.87.
Correct Answer:
B
— 3.87
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Q. What is the pH of a 0.001 M solution of hydrochloric acid?
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Solution
pH = -log(0.001) = 3.
Correct Answer:
A
— 3
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Q. What is the pH of a 0.01 M HCl solution?
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Solution
The pH of a 0.01 M HCl solution is 2, as HCl is a strong acid and fully dissociates.
Correct Answer:
B
— 2
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Q. What is the pH of a 0.01 M HCl solution? (2021) 2021
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Solution
For a strong acid like HCl, pH = -log[H+] = -log(0.01) = 2.
Correct Answer:
A
— 1
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Q. What is the pH of a 0.01 M NaOH solution?
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Solution
For NaOH, which is a strong base, pOH = -log[OH-]. [OH-] = 0.01 M, so pOH = 2. Therefore, pH = 14 - pOH = 14 - 2 = 12.
Correct Answer:
A
— 12
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Q. What is the pH of a 0.01 M solution of Na2CO3?
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Solution
Na2CO3 is a basic salt, pH is approximately 11.5.
Correct Answer:
C
— 12
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