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. Which of the following is true about the adsorption of gases on solids? (2023)
A.
It is always an exothermic process
B.
It is always an endothermic process
C.
It can be either exothermic or endothermic
D.
It does not involve energy changes
Show solution
Solution
The adsorption of gases on solids is typically an exothermic process, as energy is released when the gas molecules adhere to the surface.
Correct Answer:
A
— It is always an exothermic process
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Q. Which of the following is true about the classification of living organisms? (2022)
A.
It is static and unchanging
B.
It is based on evolutionary relationships
C.
It does not consider genetic information
D.
It is only based on morphological features
Show solution
Solution
Modern classification is based on evolutionary relationships, including genetic information.
Correct Answer:
B
— It is based on evolutionary relationships
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Q. Which of the following is true about the entropy of a system?
A.
It always decreases.
B.
It is a measure of disorder.
C.
It is independent of temperature.
D.
It can never increase.
Show solution
Solution
Entropy is a measure of disorder in a system, and it tends to increase in spontaneous processes.
Correct Answer:
B
— It is a measure of disorder.
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Q. Which of the following is true about the escape velocity from the surface of the Earth?
A.
It is independent of the mass of the object
B.
It is dependent on the mass of the Earth
C.
It is dependent on the radius of the Earth
D.
All of the above
Show solution
Solution
Escape velocity is independent of the mass of the object, but it depends on the mass and radius of the Earth.
Correct Answer:
D
— All of the above
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Q. Which of the following is true about the expression 2^(x+y)?
A.
It can be expressed as 2^x + 2^y.
B.
It can be expressed as 2^x * 2^y.
C.
It is always greater than 2.
D.
It is equal to 2 when x and y are both 0.
Show solution
Solution
Using the property of exponents, 2^(x+y) = 2^x * 2^y.
Correct Answer:
B
— It can be expressed as 2^x * 2^y.
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Q. Which of the following is true about the Freundlich adsorption isotherm?
A.
It applies only to monolayer adsorption
B.
It is applicable to heterogeneous surfaces
C.
It assumes a fixed number of adsorption sites
D.
It is a linear isotherm
Show solution
Solution
The Freundlich adsorption isotherm is applicable to heterogeneous surfaces and describes multilayer adsorption.
Correct Answer:
B
— It is applicable to heterogeneous surfaces
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Q. Which of the following is true about the Gibbs free energy change (ΔG) for a spontaneous process?
A.
ΔG > 0
B.
ΔG < 0
C.
ΔG = 0
D.
ΔG is always positive
Show solution
Solution
For a spontaneous process, the Gibbs free energy change (ΔG) is less than 0 (ΔG < 0).
Correct Answer:
B
— ΔG < 0
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Q. Which of the following is true about the Gibbs free energy change (ΔG)?
A.
ΔG < 0 indicates a spontaneous process
B.
ΔG > 0 indicates a spontaneous process
C.
ΔG = 0 indicates a non-spontaneous process
D.
ΔG is always positive
Show solution
Solution
A negative Gibbs free energy change (ΔG < 0) indicates that the process is spontaneous.
Correct Answer:
A
— ΔG < 0 indicates a spontaneous process
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Q. Which of the following is true about the heat capacity of a substance?
A.
It is always constant
B.
It depends on the amount of substance
C.
It is independent of temperature
D.
It is the same for all substances
Show solution
Solution
Heat capacity depends on the amount of substance; it is not a constant value.
Correct Answer:
B
— It depends on the amount of substance
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Q. Which of the following is true about the International Date Line?
A.
It is at 0° longitude
B.
It is at 180° longitude
C.
It is at 90° longitude
D.
It is at 45° longitude
Show solution
Solution
The International Date Line is located at 180° longitude.
Correct Answer:
B
— It is at 180° longitude
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Q. Which of the following is true about the law of conservation of energy?
A.
Energy can be created
B.
Energy can be destroyed
C.
Energy can be transformed
D.
Energy is always lost
Show solution
Solution
The law of conservation of energy states that energy cannot be created or destroyed, but it can be transformed from one form to another.
Correct Answer:
C
— Energy can be transformed
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Q. Which of the following is true about the number 2500?
A.
It has 2 significant figures
B.
It has 3 significant figures
C.
It has 4 significant figures
D.
It has infinite significant figures
Show solution
Solution
2500 has 2 significant figures unless specified with a decimal point.
Correct Answer:
A
— It has 2 significant figures
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Q. Which of the following is true about the period of a satellite in a low Earth orbit compared to a satellite in a high Earth orbit?
A.
The period is longer for low Earth orbit
B.
The period is shorter for low Earth orbit
C.
The periods are the same
D.
It depends on the satellite's mass
Show solution
Solution
The period of a satellite in a low Earth orbit is shorter than that of a satellite in a high Earth orbit due to the stronger gravitational pull.
Correct Answer:
B
— The period is shorter for low Earth orbit
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Q. Which of the following is true about the period of a satellite in a low Earth orbit compared to a satellite in a geostationary orbit?
A.
The period is longer for the low Earth orbit
B.
The period is shorter for the low Earth orbit
C.
The periods are the same
D.
The period depends on the satellite's mass
Show solution
Solution
A satellite in a low Earth orbit has a shorter orbital period compared to a geostationary satellite due to its closer proximity to Earth.
Correct Answer:
B
— The period is shorter for the low Earth orbit
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Q. Which of the following is true about the roots of a cubic function?
A.
It can have at most two real roots.
B.
It can have at most three real roots.
C.
It can have no real roots.
D.
It must have at least one real root.
Show solution
Solution
A cubic function can have at most three real roots, and it is guaranteed to have at least one real root due to the Intermediate Value Theorem.
Correct Answer:
B
— It can have at most three real roots.
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Q. Which of the following is true about the roots of a polynomial of odd degree?
A.
It has an even number of roots.
B.
It has at least one real root.
C.
It has no real roots.
D.
It has exactly two real roots.
Show solution
Solution
A polynomial of odd degree must have at least one real root due to the Intermediate Value Theorem.
Correct Answer:
B
— It has at least one real root.
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Q. Which of the following is true about the roots of the polynomial P(x) = x^2 + 4x + 4?
A.
It has two distinct real roots.
B.
It has one real root with multiplicity 2.
C.
It has no real roots.
D.
It has two complex roots.
Show solution
Solution
The polynomial can be factored as (x + 2)^2, indicating it has one real root with multiplicity 2.
Correct Answer:
B
— It has one real root with multiplicity 2.
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Q. Which of the following is true about the roots of the polynomial x^2 + 4x + 4?
A.
It has two distinct real roots.
B.
It has one real root with multiplicity 2.
C.
It has no real roots.
D.
It has two complex roots.
Show solution
Solution
The polynomial can be factored as (x + 2)(x + 2), indicating it has one real root with multiplicity 2.
Correct Answer:
B
— It has one real root with multiplicity 2.
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Q. Which of the following is true about the shear modulus of a material? (2023)
A.
It measures the material's response to shear stress
B.
It is always greater than Young's modulus
C.
It is independent of temperature
D.
It is the same as bulk modulus
Show solution
Solution
Shear modulus (G) measures the material's response to shear stress, indicating how it deforms under such stress.
Correct Answer:
A
— It measures the material's response to shear stress
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Q. Which of the following is true about viruses? (2022)
A.
They are prokaryotic
B.
They can reproduce independently
C.
They are acellular
D.
They have a cellular structure
Show solution
Solution
Viruses are acellular and cannot reproduce independently; they require a host cell.
Correct Answer:
C
— They are acellular
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Q. Which of the following is true for a satellite in a low Earth orbit?
A.
It has a very high orbital speed
B.
It has a very low orbital speed
C.
It does not experience any gravitational force
D.
It is not affected by atmospheric drag
Show solution
Solution
A satellite in a low Earth orbit has a very high orbital speed due to the proximity to the Earth and the gravitational pull.
Correct Answer:
A
— It has a very high orbital speed
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Q. Which of the following is true for all angles A?
A.
sin^2 A + cos^2 A = 1
B.
tan A = sin A/cos A
C.
sec A = 1/cos A
D.
All of the above
Show solution
Solution
All the given identities are true for all angles A.
Correct Answer:
D
— All of the above
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Q. Which of the following is true for all angles θ?
A.
sin(θ) = cos(90° - θ)
B.
tan(θ) = sin(θ) + cos(θ)
C.
sec(θ) = 1/tan(θ)
D.
csc(θ) = sin(θ)
Show solution
Solution
sin(θ) = cos(90° - θ) is a co-function identity.
Correct Answer:
A
— sin(θ) = cos(90° - θ)
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Q. Which of the following is true for an endothermic reaction?
A.
Heat is released
B.
ΔH is negative
C.
ΔH is positive
D.
The reaction is spontaneous
Show solution
Solution
In an endothermic reaction, heat is absorbed, resulting in a positive ΔH.
Correct Answer:
C
— ΔH is positive
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Q. Which of the following is true for log_10(0.1)?
Show solution
Solution
log_10(0.1) = log_10(10^-1) = -1.
Correct Answer:
A
— -1
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Q. Which of the following is true for log_a(b) + log_a(c)?
A.
log_a(bc)
B.
log_a(b/c)
C.
log_a(b-c)
D.
log_a(b+c)
Show solution
Solution
log_a(b) + log_a(c) = log_a(bc) by the product property of logarithms.
Correct Answer:
A
— log_a(bc)
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Q. Which of the following is true for log_a(b) and log_a(c) if b < c? (2019)
A.
log_a(b) < log_a(c)
B.
log_a(b) > log_a(c)
C.
log_a(b) = log_a(c)
D.
None of the above
Show solution
Solution
If a > 1, then log_a(b) < log_a(c) when b < c.
Correct Answer:
A
— log_a(b) < log_a(c)
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Q. Which of the following is true for log_a(bc)?
A.
log_a(b) + log_a(c)
B.
log_a(b) - log_a(c)
C.
log_a(bc) = log_a(b) * log_a(c)
D.
None of the above
Show solution
Solution
log_a(bc) = log_a(b) + log_a(c) by the product rule of logarithms.
Correct Answer:
A
— log_a(b) + log_a(c)
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Q. Which of the following is true for the expression 2^(x+1) / 2^(x-1)? (2023)
A.
2^2
B.
2^0
C.
2^1
D.
2^3
Show solution
Solution
Using the property of exponents, we have 2^(x+1 - (x-1)) = 2^(x+1-x+1) = 2^2.
Correct Answer:
C
— 2^1
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Q. Which of the following is true for the expression 2^(x+3) = 8? (2023)
A.
x = 1
B.
x = 2
C.
x = 3
D.
x = 0
Show solution
Solution
Since 8 can be expressed as 2^3, we have 2^(x+3) = 2^3, thus x + 3 = 3, leading to x = 0.
Correct Answer:
A
— x = 1
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