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. Which of the following statements about a potentiometer is true?

A. It can only measure AC voltages.
B. It requires a constant current for accurate measurements.
C. It can measure both AC and DC voltages.
D. It is only used in laboratory settings.

Solution

A potentiometer requires a constant current to ensure accurate measurements of voltage.

Correct Answer: B — It requires a constant current for accurate measurements.

Q. Which of the following statements about a rectangle is false?

A. All angles are right angles.
B. Opposite sides are equal.
C. Diagonals are equal and bisect each other.
D. All sides are equal.

Solution

In a rectangle, all angles are right angles and opposite sides are equal, but not all sides are equal.

Correct Answer: D — All sides are equal.

Q. Which of the following statements about a rectangle is true?

A. All sides are equal
B. Opposite sides are equal and all angles are 90 degrees
C. Diagonals are perpendicular
D. Only one pair of opposite sides is equal

Solution

In a rectangle, opposite sides are equal and all angles are indeed 90 degrees.

Correct Answer: B — Opposite sides are equal and all angles are 90 degrees

Q. Which of the following statements about a rhombus is false?

A. All sides are equal.
B. Opposite angles are equal.
C. Diagonals bisect each other at right angles.
D. All angles are right angles.

Solution

In a rhombus, while all sides are equal and diagonals bisect at right angles, not all angles are right angles.

Correct Answer: D — All angles are right angles.

Q. Which of the following statements about a rhombus is incorrect?

A. All sides are equal.
B. Diagonals bisect each other at right angles.
C. Diagonals are equal in length.
D. Opposite angles are equal.

Solution

In a rhombus, while all sides are equal and diagonals bisect each other at right angles, the diagonals are not equal in length.

Correct Answer: C — Diagonals are equal in length.

Q. Which of the following statements about a square is false?

A. All sides are equal.
B. All angles are right angles.
C. Diagonals are equal and bisect each other.
D. Diagonals are perpendicular to each other.

Solution

While the diagonals of a square are equal and bisect each other, they are not necessarily perpendicular to each other in all quadrilaterals.

Correct Answer: D — Diagonals are perpendicular to each other.

Q. Which of the following statements about alcohols is correct? (2022)

A. They are all soluble in water.
B. They have higher boiling points than alkanes.
C. They cannot form hydrogen bonds.
D. They are all volatile.

Solution

Alcohols have higher boiling points than alkanes due to the presence of hydrogen bonding.

Correct Answer: B — They have higher boiling points than alkanes.

Q. Which of the following statements about alcohols is incorrect? (2022)

A. They can form hydrogen bonds.
B. They are generally soluble in water.
C. They have higher boiling points than alkanes.
D. All alcohols are volatile.

Solution

Not all alcohols are volatile; for example, long-chain alcohols have lower volatility.

Correct Answer: D — All alcohols are volatile.

Q. Which of the following statements about alcohols is true?

A. They are always soluble in water.
B. They have higher boiling points than alkanes.
C. They cannot form hydrogen bonds.
D. They are less dense than water.

Solution

Alcohols have higher boiling points than alkanes due to hydrogen bonding.

Correct Answer: B — They have higher boiling points than alkanes.

Q. Which of the following statements about alkanes is true?

A. They are highly reactive.
B. They are saturated hydrocarbons.
C. They contain double bonds.
D. They are polar molecules.

Solution

Alkanes are saturated hydrocarbons, meaning they contain only single bonds between carbon atoms.

Correct Answer: B — They are saturated hydrocarbons.

Q. Which of the following statements about alkenes is true?

A. They are saturated hydrocarbons.
B. They can undergo polymerization.
C. They do not react with electrophiles.
D. They have a higher boiling point than alkanes.

Solution

Alkenes can undergo polymerization due to the presence of a double bond.

Correct Answer: B — They can undergo polymerization.

Q. Which of the following statements about alkynes is incorrect?

A. They are unsaturated hydrocarbons.
B. They contain at least one triple bond.
C. They are more reactive than alkenes.
D. They have a higher boiling point than alkenes.

Solution

Alkynes are generally less reactive than alkenes due to the stability of the triple bond.

Correct Answer: C — They are more reactive than alkenes.

Q. Which of the following statements about alkynes is true?

A. They are less acidic than alkenes.
B. They can undergo polymerization.
C. They have a higher boiling point than alkenes.
D. They are more stable than alkenes.

Solution

Alkynes have a higher boiling point than alkenes due to stronger intermolecular forces.

Correct Answer: C — They have a higher boiling point than alkenes.

Q. Which of the following statements about amines is incorrect?

A. Amines are basic in nature.
B. Amines can form salts with acids.
C. Amines have higher boiling points than alcohols.
D. Amines can act as nucleophiles.

Solution

Amines generally have lower boiling points than alcohols due to the absence of hydrogen bonding in tertiary amines.

Correct Answer: C — Amines have higher boiling points than alcohols.

Q. Which of the following statements about an arithmetic progression is true?

A. The sum of any two terms is always even.
B. The difference between any two consecutive terms is constant.
C. The product of any two terms is constant.
D. The terms are always positive.

Solution

In an arithmetic progression, the difference between any two consecutive terms is indeed constant, which defines the sequence.

Correct Answer: B — The difference between any two consecutive terms is constant.

Q. Which of the following statements about an equilateral triangle is true?

A. All sides are equal
B. All angles are 60 degrees
C. It has one obtuse angle
D. It can be isosceles

Solution

In an equilateral triangle, all sides are equal and all angles measure 60 degrees.

Correct Answer: A — All sides are equal

Q. Which of the following statements about angles formed by intersecting lines is false? (2023)

A. Vertical angles are equal
B. Adjacent angles are supplementary
C. Linear pairs are equal
D. Opposite angles are equal

Solution

Linear pairs are not equal; they are supplementary, meaning they add up to 180 degrees.

Correct Answer: C — Linear pairs are equal

Q. Which of the following statements about angles formed by intersecting lines is true?

A. Vertical angles are always supplementary.
B. Adjacent angles are always equal.
C. Linear pairs of angles are supplementary.
D. All angles formed are acute.

Solution

Linear pairs of angles formed by intersecting lines are always supplementary, meaning they add up to 180 degrees.

Correct Answer: C — Linear pairs of angles are supplementary.

Q. Which of the following statements about angles in a circle is true?

A. The angle subtended by a diameter is always acute.
B. Angles subtended by the same arc are equal.
C. The sum of angles in a circle is 360 degrees.
D. All angles in a circle are equal.

Solution

Angles subtended by the same arc at the circumference of a circle are equal.

Correct Answer: B — Angles subtended by the same arc are equal.

Q. Which of the following statements about aromatic amines is true?

A. They are more basic than aliphatic amines
B. They are less basic than aliphatic amines
C. They do not react with acids
D. They are neutral compounds

Solution

Aromatic amines are less basic than aliphatic amines due to resonance stabilization of the lone pair on nitrogen.

Correct Answer: B — They are less basic than aliphatic amines

Q. Which of the following statements about aromatic compounds is true?

A. They are always colorless
B. They have a sweet smell
C. They are non-toxic
D. They can be carcinogenic

Solution

Many aromatic compounds can be carcinogenic, such as benzene, which is known to be harmful to human health.

Correct Answer: D — They can be carcinogenic

Q. Which of the following statements about base systems is incorrect? (2023)

A. Base 2 is used in digital electronics.
B. Base 10 is the most widely used numeral system.
C. Base 16 can represent more values than base 10.
D. Base 8 is more efficient than base 2.

Solution

Base 8 (octal) is not more efficient than base 2 (binary); it simply represents values in a different way.

Correct Answer: D — Base 8 is more efficient than base 2.

Q. Which of the following statements about buoyancy is true?

A. Buoyant force acts downward
B. Buoyant force is equal to the weight of the fluid displaced
C. Buoyant force depends on the shape of the object
D. Buoyant force is always equal to the weight of the object

Solution

The buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.

Correct Answer: B — Buoyant force is equal to the weight of the fluid displaced

Q. Which of the following statements about carboxylic acids is incorrect? (2020)

A. They can form hydrogen bonds.
B. They have higher boiling points than alcohols.
C. They are less acidic than alcohols.
D. They can be converted to esters.

Solution

Carboxylic acids are more acidic than alcohols due to the resonance stabilization of their conjugate base, making the statement 'They are less acidic than alcohols' incorrect.

Correct Answer: C — They are less acidic than alcohols.

Q. Which of the following statements about carboxylic acids is true?

A. They are always soluble in water
B. They have higher boiling points than alcohols
C. They can form hydrogen bonds
D. All of the above

Solution

Carboxylic acids can form hydrogen bonds due to the presence of the -COOH group, which contributes to their higher boiling points compared to hydrocarbons.

Correct Answer: C — They can form hydrogen bonds

Q. Which of the following statements about catalysts is true?

A. They are consumed in the reaction
B. They increase the activation energy
C. They provide an alternative reaction pathway
D. They change the equilibrium constant

Solution

Catalysts provide an alternative reaction pathway with a lower activation energy, but they are not consumed in the reaction.

Correct Answer: C — They provide an alternative reaction pathway

Q. Which of the following statements about chemisorption is true? (2022)

A. It is a reversible process
B. It involves the formation of strong chemical bonds
C. It occurs at low temperatures
D. It is independent of the nature of the adsorbate

Solution

Chemisorption involves the formation of strong chemical bonds between the adsorbate and the surface, making it generally irreversible.

Correct Answer: B — It involves the formation of strong chemical bonds

Q. Which of the following statements about circularly polarized light is true?

A. It has no preferred direction of oscillation
B. It oscillates in a single plane
C. It can be converted to linearly polarized light
D. It is always produced by reflection

Solution

Circularly polarized light has no preferred direction of oscillation; the electric field vector rotates in a circular motion.

Correct Answer: A — It has no preferred direction of oscillation

Q. Which of the following statements about colligative properties is true?

A. They depend on the identity of the solute
B. They depend on the number of solute particles
C. They are independent of temperature
D. They are only applicable to ionic compounds

Solution

Colligative properties depend on the number of solute particles in a solution, not their identity.

Correct Answer: B — They depend on the number of solute particles

Q. Which of the following statements about constraint-based sets is correct?

A. All elements in a constraint-based set must be unique.
B. Constraints can be both inclusive and exclusive.
C. Constraints do not affect the size of the set.
D. All elements must be integers.

Solution

Constraints can be both inclusive (allowing certain elements) and exclusive (disallowing others), affecting the composition of the set.

Correct Answer: B — Constraints can be both inclusive and exclusive.

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