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 p-block elements has the highest electronegativity?
A.
Fluorine
B.
Oxygen
C.
Nitrogen
D.
Chlorine
Show solution
Solution
Fluorine has the highest electronegativity among all elements.
Correct Answer:
A
— Fluorine
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Q. Which of the following p-block elements is a metalloid?
A.
Boron
B.
Carbon
C.
Silicon
D.
Phosphorus
Show solution
Solution
Boron is a metalloid among the p-block elements.
Correct Answer:
A
— Boron
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Q. Which of the following p-block elements is essential for life?
A.
Arsenic
B.
Phosphorus
C.
Bismuth
D.
Lead
Show solution
Solution
Phosphorus is essential for life, particularly in DNA and ATP.
Correct Answer:
B
— Phosphorus
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Q. Which of the following p-block elements is essential for plant growth?
A.
Boron
B.
Lead
C.
Arsenic
D.
Bismuth
Show solution
Solution
Boron is an essential micronutrient for plant growth.
Correct Answer:
A
— Boron
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Q. Which of the following p-block elements is known for forming a stable +4 oxidation state?
A.
Carbon
B.
Silicon
C.
Germanium
D.
Tin
Show solution
Solution
Tin (Sn) is known for forming a stable +4 oxidation state.
Correct Answer:
D
— Tin
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Q. Which of the following p-block elements is known for forming stable +3 oxidation state compounds?
A.
Aluminum
B.
Silicon
C.
Carbon
D.
Lead
Show solution
Solution
Aluminum commonly forms stable +3 oxidation state compounds.
Correct Answer:
A
— Aluminum
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Q. Which of the following p-block elements is known for forming stable +3 oxidation state?
A.
Bismuth
B.
Lead
C.
Tin
D.
Thallium
Show solution
Solution
Thallium is known for forming a stable +3 oxidation state.
Correct Answer:
D
— Thallium
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Q. Which of the following pairs are both f-block elements?
A.
Uranium and Thorium
B.
Lanthanum and Cerium
C.
Neodymium and Plutonium
D.
Zirconium and Hafnium
Show solution
Solution
Neodymium (Nd) and Plutonium (Pu) are both f-block elements.
Correct Answer:
C
— Neodymium and Plutonium
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Q. Which of the following pairs are enantiomers?
A.
D-Glucose and L-Glucose
B.
C2H6 and C2H5OH
C.
n-Butane and Isobutane
D.
C3H8 and C3H6
Show solution
Solution
D-Glucose and L-Glucose are mirror images of each other, making them enantiomers.
Correct Answer:
A
— D-Glucose and L-Glucose
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Q. Which of the following pairs are f-block elements? (2023)
A.
Zinc and Cadmium
B.
Lanthanum and Cerium
C.
Iron and Cobalt
D.
Copper and Silver
Show solution
Solution
Lanthanum (La) and Cerium (Ce) are both f-block elements, belonging to the lanthanide series.
Correct Answer:
B
— Lanthanum and Cerium
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Q. Which of the following pairs are structural isomers?
A.
Cis-2-butene and trans-2-butene
B.
1-pentanol and 2-pentanol
C.
Ethylene and acetylene
D.
Glucose and galactose
Show solution
Solution
1-pentanol and 2-pentanol differ in the position of the hydroxyl group, making them structural isomers.
Correct Answer:
B
— 1-pentanol and 2-pentanol
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Q. Which of the following pairs contains only prime numbers?
A.
2 and 4
B.
3 and 5
C.
6 and 7
D.
8 and 9
Show solution
Solution
3 and 5 are both prime numbers.
Correct Answer:
B
— 3 and 5
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Q. Which of the following pairs is not an analogy: Hand: Glove, Foot: Shoe, Head: Hat, Arm: Sleeve?
A.
Hand: Glove
B.
Foot: Shoe
C.
Head: Hat
D.
Arm: Sleeve
Show solution
Solution
All pairs are correct except Arm: Sleeve, as sleeve is not a covering for the arm.
Correct Answer:
D
— Arm: Sleeve
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Q. Which of the following pairs of angles are complementary?
A.
30 degrees and 60 degrees
B.
45 degrees and 45 degrees
C.
90 degrees and 0 degrees
D.
All of the above
Show solution
Solution
Complementary angles are two angles whose sum is 90 degrees. All the given pairs meet this criterion.
Correct Answer:
D
— All of the above
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Q. Which of the following pairs of angles are considered to be adjacent?
A.
Angles that share a common vertex and side.
B.
Angles that are opposite each other.
C.
Angles that are both acute.
D.
Angles that sum to 180 degrees.
Show solution
Solution
Adjacent angles are defined as angles that share a common vertex and a common side.
Correct Answer:
A
— Angles that share a common vertex and side.
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Q. Which of the following pairs of angles are known as adjacent angles?
A.
Angles that share a common vertex and a common side.
B.
Angles that are opposite each other.
C.
Angles that are both acute.
D.
Angles that sum to 180 degrees.
Show solution
Solution
Adjacent angles are defined as angles that share a common vertex and a common side.
Correct Answer:
A
— Angles that share a common vertex and a common side.
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Q. Which of the following pairs of angles are supplementary?
A.
Two acute angles
B.
Two obtuse angles
C.
An acute angle and an obtuse angle
D.
Two right angles
Show solution
Solution
Supplementary angles are two angles that add up to 180 degrees. An acute angle (less than 90 degrees) and an obtuse angle (more than 90 degrees) can add up to 180 degrees.
Correct Answer:
C
— An acute angle and an obtuse angle
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Q. Which of the following pairs of atoms will form a bond with the highest bond order?
A.
C and O
B.
N and O
C.
C and N
D.
O and O
Show solution
Solution
C and N will form a bond with the highest bond order of 3, as seen in the molecule CN.
Correct Answer:
C
— C and N
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Q. Which of the following pairs of atoms will form a stable diatomic molecule according to molecular orbital theory?
A.
N and O
B.
O and F
C.
C and N
D.
B and O
Show solution
Solution
C and N will form a stable diatomic molecule as they have suitable bond orders and electron configurations.
Correct Answer:
C
— C and N
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Q. Which of the following pairs of compounds are enantiomers?
A.
D-Glucose and L-Glucose
B.
Cis-2-butene and Trans-2-butene
C.
1-butanol and 2-butanol
D.
Acetic acid and Propanoic acid
Show solution
Solution
D-Glucose and L-Glucose are mirror images of each other, making them enantiomers.
Correct Answer:
A
— D-Glucose and L-Glucose
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Q. Which of the following pairs of compounds are functional isomers?
A.
C2H6 and C2H5OH
B.
C3H8 and C3H6
C.
C4H10 and C4H8
D.
C5H12 and C5H10
Show solution
Solution
C2H6 (ethane) and C2H5OH (ethanol) have different functional groups, making them functional isomers.
Correct Answer:
A
— C2H6 and C2H5OH
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Q. Which of the following pairs of compounds are geometric isomers?
A.
Cis-2-butene and trans-2-butene
B.
1-butanol and 2-butanol
C.
Ethylene and acetylene
D.
Cyclohexane and hexane
Show solution
Solution
Cis-2-butene and trans-2-butene differ in the arrangement of groups around the double bond, making them geometric isomers.
Correct Answer:
A
— Cis-2-butene and trans-2-butene
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Q. Which of the following pairs of compounds are structural isomers?
A.
Cis-2-butene and trans-2-butene
B.
1-pentanol and 2-pentanol
C.
Ethyl alcohol and dimethyl ether
D.
Glucose and galactose
Show solution
Solution
Ethyl alcohol (ethanol) and dimethyl ether have the same molecular formula but different structures.
Correct Answer:
C
— Ethyl alcohol and dimethyl ether
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Q. Which of the following pairs of elements are both f-block elements?
A.
Ce and La
B.
U and Th
C.
Y and Zr
D.
Fe and Co
Show solution
Solution
Cerium (Ce) and Lanthanum (La) are both f-block elements.
Correct Answer:
B
— U and Th
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Q. Which of the following pairs of elements are lanthanides?
A.
Ce and La
B.
Ti and V
C.
Fe and Co
D.
Cu and Zn
Show solution
Solution
Cerium (Ce) and Lanthanum (La) are both lanthanides, which are f-block elements.
Correct Answer:
A
— Ce and La
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Q. Which of the following pairs of equations represents parallel lines?
A.
2x + 3y = 6 and 4x + 6y = 12
B.
x - y = 1 and x + y = 1
C.
3x + 2y = 5 and 3x - 2y = 5
D.
x + 2y = 3 and 2x + 4y = 6
Show solution
Solution
The first pair has the same slope (2/3) and thus represents parallel lines.
Correct Answer:
A
— 2x + 3y = 6 and 4x + 6y = 12
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Q. Which of the following pairs of linear equations has no solution?
A.
x + y = 2 and x + y = 4
B.
2x - y = 1 and 4x - 2y = 2
C.
3x + 2y = 6 and 6x + 4y = 12
D.
x - 2y = 3 and 2x - 4y = 6
Show solution
Solution
The first pair represents parallel lines, which means they will never intersect, hence no solution.
Correct Answer:
A
— x + y = 2 and x + y = 4
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Q. Which of the following pairs of molecules has the same bond order?
A.
N2 and CO
B.
O2 and F2
C.
C2 and B2
D.
He2 and Ne2
Show solution
Solution
N2 and CO both have a bond order of 3.
Correct Answer:
A
— N2 and CO
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Q. Which of the following pairs of numbers are congruent modulo 6?
A.
8 and 14
B.
10 and 16
C.
12 and 18
D.
All of the above
Show solution
Solution
All pairs have the same remainder when divided by 6: 8 mod 6 = 2, 14 mod 6 = 2; 10 mod 6 = 4, 16 mod 6 = 4; 12 mod 6 = 0, 18 mod 6 = 0.
Correct Answer:
D
— All of the above
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Q. Which of the following pairs of numbers has a GCD of 1?
A.
8 and 12
B.
15 and 28
C.
9 and 27
D.
10 and 20
Show solution
Solution
15 and 28 have no common factors other than 1, making their GCD equal to 1.
Correct Answer:
B
— 15 and 28
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