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 standard reduction potential of a half-reaction? (2022)
A.
The tendency to gain electrons
B.
The tendency to lose electrons
C.
The energy released during oxidation
D.
The energy absorbed during reduction
Show solution
Solution
The standard reduction potential indicates the tendency of a species to gain electrons, thus being reduced.
Correct Answer:
A
— The tendency to gain electrons
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Q. What is the standard reduction potential of the half-reaction Cu2+ + 2e- → Cu? (2022)
A.
+0.34 V
B.
+0.76 V
C.
-0.34 V
D.
-0.76 V
Show solution
Solution
The standard reduction potential for the half-reaction Cu2+ + 2e- → Cu is +0.76 V, indicating a strong tendency to gain electrons.
Correct Answer:
B
— +0.76 V
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Q. What is the standard reduction potential of the half-reaction Fe^3+ + 3e- → Fe? (2022)
A.
+0.77 V
B.
+0.44 V
C.
-0.77 V
D.
-0.44 V
Show solution
Solution
The standard reduction potential for the half-reaction Fe^3+ + 3e- → Fe is +0.77 V, indicating a strong tendency to gain electrons.
Correct Answer:
A
— +0.77 V
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Q. What is the standard state of a substance?
A.
The most stable form at 1 atm and 25°C
B.
Any form of the substance
C.
The gaseous form only
D.
The liquid form only
Show solution
Solution
The standard state of a substance is defined as its most stable form at 1 atm pressure and 25°C.
Correct Answer:
A
— The most stable form at 1 atm and 25°C
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Q. What is the standard temperature and pressure (STP) in Kelvin and atm? (2020)
A.
0 K and 1 atm
B.
273 K and 1 atm
C.
100 K and 1 atm
D.
273 K and 0 atm
Show solution
Solution
Standard temperature and pressure (STP) is defined as 273 K and 1 atm.
Correct Answer:
B
— 273 K and 1 atm
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Q. What is the standard unit of temperature in the SI system?
A.
Celsius
B.
Fahrenheit
C.
Kelvin
D.
Rankine
Show solution
Solution
The standard unit of temperature in the SI system is Kelvin (K).
Correct Answer:
C
— Kelvin
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Q. What is the standard unit of time in the SI system? (2020)
A.
Minute
B.
Hour
C.
Second
D.
Day
Show solution
Solution
The standard unit of time in the SI system is the second (s).
Correct Answer:
C
— Second
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Q. What is the Stefan-Boltzmann law related to?
A.
Conduction
B.
Convection
C.
Radiation
D.
Thermal expansion
Show solution
Solution
The Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body is proportional to the fourth power of its absolute temperature.
Correct Answer:
C
— Radiation
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Q. What is the structural formula for 2-methylpropane?
A.
CH3-CH2-CH(CH3)-CH3
B.
CH3-CH(CH3)-CH2-CH3
C.
CH3-CH2-CH2-CH3
D.
CH3-CH2-CH(CH2)-CH3
Show solution
Solution
The structural formula for 2-methylpropane is CH3-CH(CH3)-CH2-CH3.
Correct Answer:
B
— CH3-CH(CH3)-CH2-CH3
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Q. What is the structural formula for hexane?
A.
C6H14
B.
C5H12
C.
C4H10
D.
C3H8
Show solution
Solution
The structural formula for hexane is C6H14.
Correct Answer:
A
— C6H14
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Q. What is the structural formula of 2-methylpropane?
A.
CH3-CH2-CH(CH3)-CH3
B.
CH3-CH(CH3)-CH2-CH3
C.
CH3-CH2-CH2-CH3
D.
CH3-CH2-CH(CH2)-CH3
Show solution
Solution
The structural formula of 2-methylpropane is CH3-CH(CH3)-CH2-CH3.
Correct Answer:
B
— CH3-CH(CH3)-CH2-CH3
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Q. What is the structural formula of propane?
A.
C3H8
B.
C2H6
C.
C4H10
D.
C5H12
Show solution
Solution
The structural formula of propane is C3H8, indicating three carbon atoms.
Correct Answer:
A
— C3H8
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Q. What is the structure of a nucleotide?
A.
Sugar, phosphate, and base
B.
Amino group, carboxyl group, and side chain
C.
Glycerol and fatty acids
D.
Monosaccharides
Show solution
Solution
A nucleotide consists of a sugar, a phosphate group, and a nitrogenous base.
Correct Answer:
A
— Sugar, phosphate, and base
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Q. What is the structure of DNA described as? (2022)
A.
Single helix
B.
Double helix
C.
Triple helix
D.
Linear strand
Show solution
Solution
DNA is described as a double helix, consisting of two strands that wind around each other.
Correct Answer:
B
— Double helix
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Q. What is the structure of DNA primarily composed of? (2023)
A.
Amino acids
B.
Nucleotides
C.
Fatty acids
D.
Monosaccharides
Show solution
Solution
DNA is composed of nucleotides, which include a sugar, phosphate, and nitrogenous base.
Correct Answer:
B
— Nucleotides
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Q. What is the structure of DNA?
A.
Single-stranded
B.
Double helix
C.
Triple helix
D.
Linear
Show solution
Solution
DNA has a double helix structure, consisting of two strands that coil around each other.
Correct Answer:
B
— Double helix
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Q. What is the sum of all factors of 12?
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Solution
Factors of 12 are 1, 2, 3, 4, 6, 12. Their sum is 28.
Correct Answer:
A
— 28
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Q. What is the sum of all factors of 24?
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Solution
The factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24. Their sum is 60.
Correct Answer:
A
— 60
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Q. What is the sum of the angles in a triangle? (2017)
A.
180 degrees
B.
360 degrees
C.
90 degrees
D.
270 degrees
Show solution
Solution
The sum of the angles in a triangle is always 180 degrees.
Correct Answer:
A
— 180 degrees
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Q. What is the sum of the coefficients in the expansion of (2 + 3)^4? (2022)
A.
81
B.
64
C.
100
D.
125
Show solution
Solution
The sum of the coefficients is (2 + 3)^4 = 5^4 = 625.
Correct Answer:
A
— 81
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Q. What is the sum of the coefficients in the expansion of (2 + 3x)^4?
A.
81
B.
64
C.
100
D.
125
Show solution
Solution
The sum of the coefficients is found by substituting x = 1: (2 + 3*1)^4 = 5^4 = 625.
Correct Answer:
A
— 81
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Q. What is the sum of the coefficients in the expansion of (2x - 3)^4?
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Solution
To find the sum of the coefficients, substitute x = 1: (2*1 - 3)^4 = (-1)^4 = 1. The sum of coefficients is 81.
Correct Answer:
B
— 81
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Q. What is the sum of the coefficients in the expansion of (3x - 2)^4? (2023)
Show solution
Solution
To find the sum of the coefficients, substitute x = 1. Thus, (3(1) - 2)^4 = (3 - 2)^4 = 1^4 = 1.
Correct Answer:
B
— 81
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Q. What is the sum of the coefficients in the expansion of (x + 1)^4?
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Solution
The sum of the coefficients in the expansion of (x + 1)^4 is (1 + 1)^4 = 2^4 = 16.
Correct Answer:
C
— 16
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Q. What is the sum of the coefficients in the expansion of (x + 1)^5?
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Solution
The sum of the coefficients is found by substituting x = 1, so (1 + 1)^5 = 2^5 = 32.
Correct Answer:
D
— 32
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Q. What is the sum of the coefficients in the expansion of (x + 1)^7?
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Solution
The sum of the coefficients is found by substituting x = 1, giving (1 + 1)^7 = 2^7 = 128.
Correct Answer:
A
— 128
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Q. What is the sum of the coefficients in the expansion of (x + 1)^8?
A.
256
B.
512
C.
128
D.
64
Show solution
Solution
The sum of the coefficients in the expansion of (x + 1)^n is given by (1 + 1)^n = 2^n. Here, n=8, so the sum is 2^8 = 256.
Correct Answer:
B
— 512
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Q. What is the sum of the coefficients in the expansion of (x + 2)^5? (2021)
Show solution
Solution
The sum of the coefficients is found by substituting x=1. So, (1 + 2)^5 = 3^5 = 243.
Correct Answer:
B
— 64
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Q. What is the sum of the complex numbers 1 + 2i and 3 - 4i? (2023)
A.
4 - 2i
B.
4 + 2i
C.
2 - 2i
D.
2 + 2i
Show solution
Solution
(1 + 2i) + (3 - 4i) = (1 + 3) + (2 - 4)i = 4 - 2i.
Correct Answer:
A
— 4 - 2i
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Q. What is the sum of the complex numbers 2 + 3i and 4 - 5i?
A.
6 - 2i
B.
6 + 2i
C.
2 - 2i
D.
2 + 2i
Show solution
Solution
The sum is (2 + 4) + (3 - 5)i = 6 - 2i.
Correct Answer:
A
— 6 - 2i
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