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 is true about adsorption? (2023)

A. It is a bulk phenomenon
B. It is a surface phenomenon
C. It occurs only in gases
D. It is always exothermic

Solution

Adsorption is a surface phenomenon as it occurs at the interface between phases.

Correct Answer: B — It is a surface phenomenon

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

A. They cannot form hydrogen bonds
B. They are generally more reactive than ketones
C. They have higher boiling points than ketones
D. They are less soluble in water than ketones

Solution

Aldehydes are generally more reactive than ketones due to the presence of the hydrogen atom attached to the carbonyl carbon.

Correct Answer: B — They are generally more reactive than ketones

Q. Which of the following statements is true about alkali metals? (2023)

A. They are good conductors of electricity
B. They have high ionization energies
C. They are found in nature in free state
D. They form acidic oxides

Solution

Alkali metals are good conductors of electricity due to the presence of free-moving electrons.

Correct Answer: A — They are good conductors of electricity

Q. Which of the following statements is true about alkenes? (2019)

A. They contain at least one double bond
B. They are saturated hydrocarbons
C. They have a general formula of C_nH_(2n+2)
D. They cannot undergo addition reactions

Solution

Alkenes are characterized by the presence of at least one double bond between carbon atoms.

Correct Answer: A — They contain at least one double bond

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

A. They are less reactive than alkenes.
B. They are more acidic than alkenes.
C. They cannot undergo addition reactions.
D. They have a higher boiling point than alkenes.

Solution

Alkynes are more acidic than alkenes due to the sp hybridization of the carbon atoms.

Correct Answer: B — They are more acidic than alkenes.

Q. Which of the following statements is true about an exothermic reaction?

A. It absorbs heat
B. It releases heat
C. It has a positive enthalpy change
D. It is always spontaneous

Solution

An exothermic reaction releases heat, resulting in a negative enthalpy change.

Correct Answer: B — It releases heat

Q. Which of the following statements is true about an ideal gas?

A. It has no intermolecular forces
B. It behaves according to the ideal gas law at all temperatures
C. It can be liquefied at any temperature
D. Its specific heat is constant

Solution

An ideal gas is defined as a gas that has no intermolecular forces and follows the ideal gas law under all conditions.

Correct Answer: A — It has no intermolecular forces

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

A. They are always saturated
B. They contain a benzene ring
C. They are non-polar
D. They do not undergo electrophilic substitution

Solution

Aromatic compounds are characterized by the presence of a benzene ring, which is a stable cyclic structure.

Correct Answer: B — They contain a benzene ring

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

A. It is more reactive than magnesium
B. It forms covalent compounds
C. It has a higher density than lithium
D. It is a liquid at room temperature

Solution

Beryllium forms covalent compounds due to its small size and high ionization energy.

Correct Answer: B — It forms covalent compounds

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

A. They are always soluble in water
B. They have higher boiling points than alcohols
C. They cannot form hydrogen bonds
D. They are weak bases

Solution

Carboxylic acids have higher boiling points than alcohols due to the ability to form dimers through hydrogen bonding.

Correct Answer: B — They have higher boiling points than alcohols

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

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

Solution

Catalysts provide an alternative pathway with lower activation energy, thus increasing the rate of the reaction without being consumed.

Correct Answer: C — They provide an alternative pathway with lower activation energy

Q. Which of the following statements is true about continuous functions?

A. They can be differentiated everywhere
B. They are always bounded
C. They can be integrated
D. They can have jump discontinuities

Solution

Continuous functions can be integrated over an interval, but they are not necessarily differentiable or bounded.

Correct Answer: C — They can be integrated

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

A. They always have a positive charge
B. They can exhibit color
C. They cannot form complexes
D. They are always soluble in water

Solution

Coordination compounds can exhibit color due to d-d transitions and are not limited to having a positive charge.

Correct Answer: B — They can exhibit color

Q. Which of the following statements is true about coordination compounds? (2021) 2021

A. They are always ionic
B. They can exhibit optical isomerism
C. They have fixed oxidation states
D. They cannot form complexes

Solution

Coordination compounds can exhibit optical isomerism due to the arrangement of ligands around the central metal ion.

Correct Answer: B — They can exhibit optical isomerism

Q. Which of the following statements is true about dynamic equilibrium?

A. The concentrations of reactants and products are equal
B. The rate of the forward reaction equals the rate of the reverse reaction
C. The reaction has stopped
D. All reactions reach dynamic equilibrium

Solution

Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction, not necessarily when concentrations are equal.

Correct Answer: B — The rate of the forward reaction equals the rate of the reverse reaction

Q. Which of the following statements is true about electric current? (2019)

A. It is the flow of protons.
B. It is the flow of electrons.
C. It is the flow of neutrons.
D. It is the flow of ions.

Solution

Electric current is defined as the flow of electrons in a conductor.

Correct Answer: B — It is the flow of electrons.

Q. Which of the following statements is true about electric field lines?

A. They can cross each other
B. They are always straight
C. They point from positive to negative
D. They are always circular

Solution

Electric field lines point from positive to negative charges and never cross each other.

Correct Answer: C — They point from positive to negative

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

A. It requires a spontaneous reaction
B. It is an endothermic process
C. It involves the decomposition of a compound
D. It occurs in a galvanic cell

Solution

Electrolysis involves the decomposition of a compound using electrical energy.

Correct Answer: C — It involves the decomposition of a compound

Q. Which of the following statements is true about electrolytic cells?

A. They produce electrical energy
B. They require an external power source
C. They operate spontaneously
D. They are always exothermic

Solution

Electrolytic cells require an external power source to drive the non-spontaneous reactions.

Correct Answer: B — They require an external power source

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

A. Entropy is a measure of disorder
B. Entropy decreases in irreversible processes
C. Entropy is constant in reversible processes
D. Both a and c are true

Solution

Entropy is a measure of disorder, and it is constant in reversible processes, making both statements a and c true.

Correct Answer: D — Both a and c are true

Q. Which of the following statements is true about equipotential surfaces?

A. They are always parallel to each other
B. No work is done moving a charge along them
C. They can intersect
D. They are always spherical

Solution

No work is done when moving a charge along an equipotential surface because the potential is constant.

Correct Answer: B — No work is done moving a charge along them

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

A. They are polar compounds
B. They have high boiling points
C. They are highly reactive
D. They are used as solvents

Solution

Ethers are commonly used as solvents due to their relatively low reactivity and ability to dissolve a wide range of substances.

Correct Answer: D — They are used as solvents

Q. Which of the following statements is true about exothermic reactions? (2019)

A. They absorb heat.
B. They release heat.
C. They require energy input.
D. They have a positive enthalpy change.

Solution

Exothermic reactions release heat to the surroundings, resulting in a negative enthalpy change.

Correct Answer: B — They release heat.

Q. Which of the following statements is true about galvanic cells? (2020)

A. They convert chemical energy to electrical energy
B. They require an external power source
C. They operate only in acidic solutions
D. They are always non-spontaneous

Solution

Galvanic cells convert chemical energy into electrical energy spontaneously.

Correct Answer: A — They convert chemical energy to electrical energy

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

A. They have a definite volume.
B. They are incompressible.
C. They fill the shape of their container.
D. They have strong intermolecular forces.

Solution

Gases fill the shape of their container because their particles are far apart and move freely.

Correct Answer: C — They fill the shape of their container.

Q. Which of the following statements is true about geostationary satellites?

A. They orbit the Earth in a polar orbit.
B. They have a period equal to the Earth's rotation period.
C. They are always in the same position relative to the Earth.
D. Both b and c

Solution

Geostationary satellites have a period equal to the Earth's rotation period and remain in the same position relative to the Earth.

Correct Answer: D — Both b and c

Q. Which of the following statements is true about Gibbs Free Energy?

A. ΔG is always positive for spontaneous processes.
B. ΔG = ΔH - TΔS.
C. ΔG can never be zero.
D. ΔG is independent of temperature.

Solution

The correct equation for Gibbs Free Energy is ΔG = ΔH - TΔS, which relates enthalpy, entropy, and temperature.

Correct Answer: B — ΔG = ΔH - TΔS.

Q. Which of the following statements is true about gravitational field lines?

A. They are straight lines
B. They can cross each other
C. They point towards the mass
D. They are always circular

Solution

Gravitational field lines point towards the mass creating the field.

Correct Answer: C — They point towards the mass

Q. Which of the following statements is true about gravitational potential energy?

A. It is always positive.
B. It can be negative.
C. It is independent of position.
D. It is always zero.

Solution

Gravitational potential energy can be negative depending on the reference point chosen.

Correct Answer: B — It can be negative.

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

A. They have low melting points
B. They conduct electricity in solid state
C. They are soluble in water
D. They are volatile

Solution

Ionic compounds are generally soluble in water due to the polar nature of water molecules.

Correct Answer: C — They are soluble in water

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