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. If a biotechnologist can produce 500 liters of a culture in 10 hours, how many liters can they produce in 25 hours at the same rate?
A.
1250 liters
B.
1000 liters
C.
1500 liters
D.
2000 liters
Show solution
Solution
Rate of production = 500 liters / 10 hours = 50 liters/hour. In 25 hours, production = 50 liters/hour * 25 hours = 1250 liters.
Correct Answer:
A
— 1250 liters
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Q. If a biotechnologist has 200 mg of a plasmid DNA and needs to prepare a 1:10 dilution, how much diluent should be added?
A.
180 mg
B.
200 mg
C.
1800 mg
D.
2000 mg
Show solution
Solution
To prepare a 1:10 dilution, you need to add 1800 mg of diluent to 200 mg of plasmid DNA.
Correct Answer:
C
— 1800 mg
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Q. If a biotechnologist needs to culture cells in a 100 mL medium and the cell density is 1 x 10^6 cells/mL, how many cells are in the culture?
A.
1 x 10^5
B.
1 x 10^6
C.
1 x 10^7
D.
1 x 10^8
Show solution
Solution
Total cells = cell density × volume = 1 x 10^6 cells/mL × 100 mL = 1 x 10^8 cells.
Correct Answer:
C
— 1 x 10^7
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Q. If a block is on a horizontal surface and a force is applied at an angle, how does this affect the normal force acting on the block?
A.
Increases normal force
B.
Decreases normal force
C.
No effect on normal force
D.
Depends on the angle
Show solution
Solution
Applying a force at an angle reduces the normal force because part of the applied force acts vertically upward, counteracting the weight of the block.
Correct Answer:
B
— Decreases normal force
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Q. If a boat can travel 20 km upstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 10 km/h?
A.
2 km/h
B.
3 km/h
C.
4 km/h
D.
5 km/h
Show solution
Solution
Speed upstream = distance/time = 20/4 = 5 km/h. Speed of current = speed of boat - speed upstream = 10 - 5 = 5 km/h.
Correct Answer:
A
— 2 km/h
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Q. If a boat can travel 20 km upstream in 5 hours, what is the speed of the boat in still water if the current is 2 km/h?
A.
4 km/h
B.
6 km/h
C.
8 km/h
D.
10 km/h
Show solution
Solution
Speed upstream = Distance/Time = 20 km / 5 hours = 4 km/h. Speed in still water = Speed upstream + Speed of current = 4 km/h + 2 km/h = 6 km/h.
Correct Answer:
B
— 6 km/h
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Q. If a boat can travel 50 km downstream in 2 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?
A.
5 km/h
B.
10 km/h
C.
15 km/h
D.
20 km/h
Show solution
Solution
Speed downstream = Distance/Time = 50 km / 2 hours = 25 km/h. Speed of current = Speed downstream - Speed in still water = 25 km/h - 15 km/h = 10 km/h.
Correct Answer:
A
— 5 km/h
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Q. If a boat can travel 50 km upstream in 10 hours, what is the speed of the stream if the speed of the boat in still water is 15 km/h?
A.
1 km/h
B.
2 km/h
C.
3 km/h
D.
4 km/h
Show solution
Solution
Speed upstream = 50 km / 10 h = 5 km/h. Speed of stream = Speed of boat - Speed upstream = 15 - 5 = 10 km/h.
Correct Answer:
A
— 1 km/h
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Q. If a boat can travel 50 km upstream in 5 hours, what is the speed of the stream if the speed of the boat in still water is 10 km/h?
A.
0 km/h
B.
2 km/h
C.
4 km/h
D.
6 km/h
Show solution
Solution
Speed upstream = Distance / Time = 50 / 5 = 10 km/h. Speed of stream = Speed of boat - Speed upstream = 10 - 10 = 0 km/h.
Correct Answer:
C
— 4 km/h
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Q. If a boat can travel 60 km downstream in 3 hours, what is the speed of the boat in still water if the speed of the stream is 5 km/h?
A.
15 km/h
B.
20 km/h
C.
25 km/h
D.
30 km/h
Show solution
Solution
Speed downstream = Distance / Time = 60 / 3 = 20 km/h. Speed of boat = Speed downstream - Speed of stream = 20 - 5 = 15 km/h.
Correct Answer:
C
— 25 km/h
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Q. If a boat can travel 60 km downstream in 4 hours, and the speed of the current is 6 km/h, what is the speed of the boat in still water?
A.
12 km/h
B.
15 km/h
C.
18 km/h
D.
21 km/h
Show solution
Solution
Speed downstream = 60 / 4 = 15 km/h. Speed in still water = Speed downstream - Speed of current = 15 - 6 = 9 km/h.
Correct Answer:
C
— 18 km/h
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Q. If a boat can travel 60 km upstream in 5 hours, what is the speed of the current if the speed of the boat in still water is 12 km/h?
A.
2 km/h
B.
4 km/h
C.
6 km/h
D.
8 km/h
Show solution
Solution
Speed upstream = 60 km / 5 h = 12 km/h. Speed of current = Speed in still water - Speed upstream = 12 km/h - 12 km/h = 0 km/h.
Correct Answer:
A
— 2 km/h
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Q. If a boat can travel 60 km upstream in 5 hours, what is the speed of the stream if the speed of the boat in still water is 15 km/h?
A.
3 km/h
B.
5 km/h
C.
7 km/h
D.
9 km/h
Show solution
Solution
Speed upstream = 60 / 5 = 12 km/h. Speed of stream = Speed of boat - Speed upstream = 15 - 12 = 3 km/h.
Correct Answer:
A
— 3 km/h
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Q. If a boat can travel 90 km upstream in 6 hours, what is the speed of the stream if the speed of the boat in still water is 15 km/h?
A.
0 km/h
B.
2.5 km/h
C.
5 km/h
D.
7.5 km/h
Show solution
Solution
Speed upstream = Distance / Time = 90 / 6 = 15 km/h. Speed of stream = Speed of boat - Speed upstream = 15 - 15 = 0 km/h.
Correct Answer:
C
— 5 km/h
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Q. If a boat can travel at 15 km/h in still water and the current is 5 km/h, what is the speed of the boat upstream?
A.
10 km/h
B.
15 km/h
C.
20 km/h
D.
25 km/h
Show solution
Solution
Speed upstream = speed of boat - speed of current = 15 - 5 = 10 km/h.
Correct Answer:
A
— 10 km/h
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Q. If a boat can travel at 20 km/h in still water and the current is 5 km/h, what is the speed of the boat downstream?
A.
15 km/h
B.
20 km/h
C.
25 km/h
D.
30 km/h
Show solution
Solution
Downstream speed = Speed in still water + Speed of current = 20 km/h + 5 km/h = 25 km/h.
Correct Answer:
C
— 25 km/h
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Q. If a boat can travel at 20 km/h in still water and the speed of the stream is 5 km/h, how long will it take to travel 60 km downstream?
A.
2 hours
B.
3 hours
C.
4 hours
D.
5 hours
Show solution
Solution
Speed downstream = 20 + 5 = 25 km/h. Time = Distance / Speed = 60 / 25 = 2.4 hours.
Correct Answer:
B
— 3 hours
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Q. If a boat goes 30 km downstream in 2 hours, what is the speed of the boat in still water if the speed of the current is 5 km/h?
A.
10 km/h
B.
15 km/h
C.
20 km/h
D.
25 km/h
Show solution
Solution
Speed downstream = Distance / Time = 30 / 2 = 15 km/h. Speed in still water = Speed downstream - Speed of current = 15 - 5 = 10 km/h.
Correct Answer:
B
— 15 km/h
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Q. If a boat goes 30 km upstream in 3 hours, what is the speed of the current if the speed of the boat in still water is 12 km/h?
A.
2 km/h
B.
4 km/h
C.
6 km/h
D.
8 km/h
Show solution
Solution
Speed upstream = Distance/Time = 30 km / 3 h = 10 km/h. Speed of current = Speed in still water - Speed upstream = 12 km/h - 10 km/h = 2 km/h.
Correct Answer:
B
— 4 km/h
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Q. If a boat goes 30 km upstream in 3 hours, what is the speed of the stream if the speed of the boat in still water is 12 km/h?
A.
2 km/h
B.
4 km/h
C.
6 km/h
D.
8 km/h
Show solution
Solution
Speed upstream = Distance / Time = 30 / 3 = 10 km/h. Speed of stream = Speed of boat - Speed upstream = 12 - 10 = 2 km/h.
Correct Answer:
B
— 4 km/h
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Q. If a boat goes 30 km upstream in 6 hours, what is the speed of the current if the speed of the boat in still water is 12 km/h?
A.
2 km/h
B.
3 km/h
C.
4 km/h
D.
5 km/h
Show solution
Solution
Speed upstream = Distance/Time = 30 km / 6 hours = 5 km/h. Speed of current = Speed in still water - Speed upstream = 12 km/h - 5 km/h = 7 km/h.
Correct Answer:
B
— 3 km/h
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Q. If a boat goes 30 km upstream in 6 hours, what is the speed of the stream if the speed of the boat in still water is 12 km/h?
A.
2 km/h
B.
3 km/h
C.
4 km/h
D.
5 km/h
Show solution
Solution
Speed upstream = Distance / Time = 30 km / 6 h = 5 km/h. Speed of stream = Speed of boat - Speed upstream = 12 - 5 = 7 km/h.
Correct Answer:
B
— 3 km/h
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Q. If a boat takes 2 hours to go 24 km upstream, what is the speed of the current if the speed of the boat in still water is 10 km/h?
A.
2 km/h
B.
4 km/h
C.
6 km/h
D.
8 km/h
Show solution
Solution
Speed upstream = Distance/Time = 24 km / 2 h = 12 km/h. Speed of current = Speed in still water - Speed upstream = 10 km/h - 12 km/h = -2 km/h (not possible).
Correct Answer:
B
— 4 km/h
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Q. If a boat's speed in still water is 10 km/h and it takes 1 hour to travel downstream, how far can it go?
A.
5 km
B.
10 km
C.
15 km
D.
20 km
Show solution
Solution
Distance = Speed x Time = (10 + Speed of stream) x 1. Assuming stream speed is 0, distance = 10 km.
Correct Answer:
D
— 20 km
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Q. If a boat's speed in still water is 15 km/h and it takes 3 hours to travel downstream, how far can it go?
A.
30 km
B.
45 km
C.
60 km
D.
75 km
Show solution
Solution
Speed downstream = 15 + speed of stream. Assuming stream speed is negligible, Distance = Speed * Time = 15 km/h * 3 h = 45 km.
Correct Answer:
C
— 60 km
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Q. If a boat's speed in still water is 18 km/h and it takes 5 hours to travel downstream, how far can it go?
A.
60 km
B.
90 km
C.
100 km
D.
120 km
Show solution
Solution
Distance = Speed x Time = 18 x 5 = 90 km.
Correct Answer:
D
— 120 km
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Q. If a body has a moment of inertia of 15 kg m² and is subjected to a torque of 5 N m, what is its angular acceleration?
A.
0.33 rad/s²
B.
0.5 rad/s²
C.
1 rad/s²
D.
3 rad/s²
Show solution
Solution
Angular acceleration α = τ/I = 5 N m / 15 kg m² = 0.33 rad/s².
Correct Answer:
A
— 0.33 rad/s²
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Q. If a body is moving in a circular path with a constant speed, what is its acceleration? (2023)
A.
Zero
B.
Tangential
C.
Centripetal
D.
Radial
Show solution
Solution
The body experiences centripetal acceleration directed towards the center of the circular path.
Correct Answer:
C
— Centripetal
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Q. If a body is moving in a circular path with a constant speed, what type of acceleration does it experience?
A.
Centripetal acceleration
B.
Linear acceleration
C.
Angular acceleration
D.
No acceleration
Show solution
Solution
A body moving in a circular path experiences centripetal acceleration directed towards the center of the circle.
Correct Answer:
A
— Centripetal acceleration
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Q. If a body is moving in a circular path with a constant speed, which of the following statements is true?
A.
The body is in equilibrium
B.
The net force acting on the body is zero
C.
The body experiences a centripetal force
D.
The body has no acceleration
Show solution
Solution
A body moving in a circular path with constant speed experiences a centripetal force directed towards the center of the circle.
Correct Answer:
C
— The body experiences a centripetal force
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