Major Competitive Exams

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Major Competitive Exams

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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!

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Q. What is the total energy stored in an inductor with inductance L carrying a current I?

A. LI^2
B. 0.5LI^2
C. I^2/L
D. 0.5I^2/L

Solution

The energy stored in an inductor is given by U = 0.5LI^2.

Correct Answer: B — 0.5LI^2

Q. What is the total length of India's land borders with its neighboring countries?

A. 15,106 km
B. 14,103 km
C. 16,000 km
D. 12,000 km

Solution

India shares a total land border of 15,106 km with its neighboring countries.

Correct Answer: A — 15,106 km

Q. What is the total mechanical energy of a pendulum at its highest point? (2022)

A. Maximum potential energy
B. Maximum kinetic energy
C. Zero
D. Constant

Solution

At the highest point of a pendulum's swing, all the mechanical energy is potential energy, and kinetic energy is zero.

Correct Answer: A — Maximum potential energy

Q. What is the total mechanical energy of a simple harmonic oscillator at maximum displacement? (2022)

A. Zero
B. Maximum
C. Minimum
D. Constant

Solution

At maximum displacement, the total mechanical energy of a simple harmonic oscillator is at its maximum, as all energy is potential.

Correct Answer: B — Maximum

Q. What is the total mechanical energy of a simple harmonic oscillator with a mass of 1 kg, amplitude of 0.1 m, and spring constant of 100 N/m? (2022)

A. 0.5 J
B. 1 J
C. 2 J
D. 4 J

Solution

The total mechanical energy E is given by E = (1/2)kA². Therefore, E = (1/2)(100)(0.1)² = 0.5 J.

Correct Answer: B — 1 J

Q. What is the total mechanical energy of a system at the highest point of a projectile's trajectory?

A. Maximum potential energy
B. Maximum kinetic energy
C. Zero energy
D. Constant energy

Solution

At the highest point of a projectile's trajectory, the kinetic energy is minimum (zero at the peak) and potential energy is maximum, thus total mechanical energy is maximum potential energy.

Correct Answer: A — Maximum potential energy

Q. What is the total mechanical energy of a system if the potential energy is 50 J and the kinetic energy is 30 J?

A. 80 J
B. 50 J
C. 30 J
D. 20 J

Solution

Total Mechanical Energy (TME) = Potential Energy + Kinetic Energy = 50 J + 30 J = 80 J.

Correct Answer: A — 80 J

Q. What is the total mechanical energy of an object in free fall just before it hits the ground? (2022)

A. Zero
B. Potential energy only
C. Kinetic energy only
D. Total energy is conserved

Solution

The total mechanical energy of an object in free fall is conserved, meaning it remains constant as potential energy converts to kinetic energy.

Correct Answer: D — Total energy is conserved

Q. What is the total number of atoms in 1 mole of CO2?

A. 1
B. 2
C. 3
D. 6

Solution

1 mole of CO2 contains 1 carbon atom and 2 oxygen atoms, totaling 3 atoms.

Correct Answer: C — 3

Q. What is the total number of atoms in one molecule of C2H5OH?

A. 7
B. 6
C. 5
D. 8

Solution

C2H5OH has 2 carbon, 6 hydrogen, and 1 oxygen atom, totaling 7 atoms.

Correct Answer: A — 7

Q. What is the total number of atoms in one molecule of C4H10?

A. 4
B. 10
C. 14
D. 8

Solution

C4H10 has 4 carbon atoms and 10 hydrogen atoms, totaling 14 atoms.

Correct Answer: C — 14

Q. What is the total number of degrees in a triangle formed by the intersection of the medians of a triangle? (2021)

A. 90 degrees
B. 180 degrees
C. 270 degrees
D. 360 degrees

Solution

The sum of the angles in any triangle is always 180 degrees.

Correct Answer: B — 180 degrees

Q. What is the total number of electrons in a neutral atom of carbon? (2019)

A. 4
B. 6
C. 8
D. 12

Solution

A neutral carbon atom has an atomic number of 6, which means it has 6 electrons.

Correct Answer: B — 6

Q. What is the total number of electrons in the electronic configuration [Kr] 5s2 4d10 5p5?

A. 36
B. 47
C. 54
D. 53

Solution

The total number of electrons is 36 (from Kr) + 2 (from 5s2) + 10 (from 4d10) + 5 (from 5p5) = 53.

Correct Answer: D — 53

Q. What is the total number of member states in the United Nations as of 2023?

A. 192
B. 193
C. 194
D. 195

Solution

As of 2023, the United Nations has 193 member states.

Correct Answer: B — 193

Q. What is the total number of members in the Rajya Sabha?

A. 250
B. 245
C. 300
D. 200

Solution

The Rajya Sabha, the upper house of India's Parliament, has a total of 245 members.

Correct Answer: B — 245

Q. What is the total number of moles in 2 liters of a 3 M solution? (2022)

A. 3 moles
B. 6 moles
C. 1.5 moles
D. 4 moles

Solution

Moles = Molarity * Volume = 3 mol/L * 2 L = 6 moles.

Correct Answer: B — 6 moles

Q. What is the total number of moles of gas produced when 1 mole of CaCO3 decomposes?

A. 1 mole
B. 2 moles
C. 3 moles
D. 0 moles

Solution

The decomposition of CaCO3 produces CaO and CO2: CaCO3 → CaO + CO2. This results in 1 mole of gas (CO2) being produced.

Correct Answer: B — 2 moles

Q. What is the total number of moles of gas produced when 1 mole of CaCO3 decomposes to form CaO and CO2?

A. 0.5 moles
B. 1 mole
C. 2 moles
D. 3 moles

Solution

The decomposition reaction is CaCO3 → CaO + CO2. This produces 1 mole of CaO and 1 mole of CO2, totaling 2 moles of gas.

Correct Answer: C — 2 moles

Q. What is the total number of neutrons in an atom of carbon-14? (2021)

A. 6
B. 7
C. 8
D. 14

Solution

Carbon-14 has an atomic number of 6 (6 protons). The mass number is 14, so the number of neutrons is 14 - 6 = 8.

Correct Answer: B — 7

Q. What is the total number of orbitals in the n=2 energy level?

A. 2
B. 4
C. 6
D. 8

Solution

The total number of orbitals in an energy level is given by n^2. For n=2, it is 2^2 = 4.

Correct Answer: B — 4

Q. What is the total number of orbitals in the n=2 shell?

A. 2
B. 4
C. 6
D. 8

Solution

The n=2 shell has 4 orbitals: 1s and 3p orbitals.

Correct Answer: B — 4

Q. What is the total number of orbitals in the n=3 energy level?

A. 3
B. 6
C. 9
D. 12

Solution

The total number of orbitals in the n=3 level is given by n^2 = 3^2 = 9.

Correct Answer: B — 6

Q. What is the total number of orbitals in the n=4 energy level?

A. 4
B. 8
C. 16
D. 32

Solution

The total number of orbitals in an energy level is given by n^2. For n=4, it is 4^2 = 16.

Correct Answer: C — 16

Q. What is the total number of orbitals in the n=4 shell?

A. 4
B. 8
C. 16
D. 32

Solution

The total number of orbitals in a shell is given by n^2. For n=4, it is 4^2 = 16.

Correct Answer: C — 16

Q. What is the total number of quantum numbers required to completely describe an electron in an atom?

A. 2
B. 3
C. 4
D. 5

Solution

Four quantum numbers (n, l, m_l, s) are required to completely describe an electron in an atom.

Correct Answer: C — 4

Q. What is the total number of states in India as of 2021? (2021)

A. 28
B. 29
C. 30
D. 31

Solution

As of 2021, India has 28 states.

Correct Answer: A — 28

Q. What is the total number of subsets of the empty set?

A. 0
B. 1
C. 2
D. 3

Solution

The empty set has exactly one subset, which is itself: ∅.

Correct Answer: B — 1

Q. What is the total number of subsets of the set G = {1, 2, 3, 4, 5}?

A. 32
B. 64
C. 16
D. 8

Solution

The total number of subsets is 2^5 = 32.

Correct Answer: A — 32

Q. What is the total number of terms in the expansion of (x + 2y)^6?

A. 6
B. 7
C. 8
D. 9

Solution

The total number of terms is n + 1 = 6 + 1 = 7.

Correct Answer: C — 8

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