Q. In which part of the plant does most transpiration occur?
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
Show solution
Solution
Most transpiration occurs in the leaves, where stomata are located to facilitate gas exchange and water loss.
Correct Answer:
C
— Leaves
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Q. In which part of the plant does most water absorption occur?
A.
Leaves
B.
Stems
C.
Roots
D.
Flowers
Show solution
Solution
Most water absorption occurs in the roots, where root hairs increase the surface area for absorption.
Correct Answer:
C
— Roots
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Q. In which part of the plant does respiration primarily occur? (2020)
A.
Roots
B.
Leaves
C.
Stems
D.
All parts
Show solution
Solution
Respiration occurs in all parts of the plant, including roots, leaves, and stems.
Correct Answer:
D
— All parts
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Q. In which part of the plant does the majority of photosynthesis occur?
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
Show solution
Solution
Leaves are the primary site of photosynthesis due to the presence of chlorophyll in chloroplasts.
Correct Answer:
C
— Leaves
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Q. In which phase do sister chromatids separate and move to opposite poles of the cell? (2019)
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Show solution
Solution
During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.
Correct Answer:
C
— Anaphase
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Q. In which phase do sister chromatids separate and move to opposite poles? (2019)
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Show solution
Solution
During Anaphase, sister chromatids are pulled apart and move toward opposite poles of the cell.
Correct Answer:
C
— Anaphase
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Q. In which phase do sister chromatids separate and move towards opposite poles? (2022)
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Show solution
Solution
During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.
Correct Answer:
C
— Anaphase
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Q. In which phase of the cell cycle does cytokinesis occur? (2021)
A.
G1 phase
B.
S phase
C.
M phase
D.
G2 phase
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Solution
Cytokinesis occurs during the M phase, following mitosis, to divide the cytoplasm and form two daughter cells.
Correct Answer:
C
— M phase
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Q. In which phase of the cell cycle does the cell spend most of its life? (2021)
A.
M phase
B.
G1 phase
C.
S phase
D.
G2 phase
Show solution
Solution
The G1 phase is where the cell spends most of its time growing and performing its normal functions.
Correct Answer:
B
— G1 phase
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Q. In which phase of the cell cycle does the cell spend the majority of its life? (2021)
A.
M phase
B.
G1 phase
C.
S phase
D.
G2 phase
Show solution
Solution
The G1 phase is where the cell spends most of its life, performing normal functions and growing.
Correct Answer:
B
— G1 phase
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Q. In which process does a gas do work on its surroundings?
A.
Isothermal expansion
B.
Adiabatic compression
C.
Isochoric process
D.
Isobaric process
Show solution
Solution
In isothermal expansion, a gas does work on its surroundings as it expands.
Correct Answer:
A
— Isothermal expansion
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Q. In which process does a substance change from solid to gas without becoming liquid? (2022)
A.
Melting
B.
Sublimation
C.
Condensation
D.
Evaporation
Show solution
Solution
The process in which a substance changes from solid to gas without becoming liquid is called sublimation.
Correct Answer:
B
— Sublimation
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Q. In which process does a substance change from solid to gas? (2022)
A.
Melting
B.
Sublimation
C.
Evaporation
D.
Condensation
Show solution
Solution
The process in which a substance changes from solid to gas is called sublimation.
Correct Answer:
B
— Sublimation
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Q. In which process does heat transfer occur due to the movement of fluid?
A.
Conduction
B.
Convection
C.
Radiation
D.
Insulation
Show solution
Solution
Convection is the process of heat transfer that occurs due to the movement of fluid, where warmer areas of a liquid or gas rise and cooler areas sink.
Correct Answer:
B
— Convection
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Q. In which process does heat transfer occur without any physical movement of the material?
A.
Conduction
B.
Convection
C.
Radiation
D.
All of the above
Show solution
Solution
Conduction is the process where heat is transferred through a material without any movement of the material itself.
Correct Answer:
A
— Conduction
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Q. In which process does the entropy of the system decrease?
A.
Freezing of water
B.
Evaporation of water
C.
Sublimation of dry ice
D.
Dissolving salt in water
Show solution
Solution
The freezing of water results in a decrease in the entropy of the system as it transitions from liquid to solid.
Correct Answer:
A
— Freezing of water
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Q. In which scenario does heat transfer occur through both conduction and convection?
A.
A hot cup of coffee cooling down
B.
A metal rod heated at one end
C.
A warm room losing heat to the outside
D.
A block of ice melting
Show solution
Solution
A hot cup of coffee cooling down involves conduction (heat transfer from coffee to cup) and convection (heat transfer from cup to air).
Correct Answer:
A
— A hot cup of coffee cooling down
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Q. In which scenario is light most likely to be polarized?
A.
When it passes through a prism
B.
When it reflects off a lake
C.
When it travels through air
D.
When it passes through a lens
Show solution
Solution
Light is most likely to be polarized when it reflects off a surface, such as a lake.
Correct Answer:
B
— When it reflects off a lake
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Q. In which scenario would the frictional force be at its maximum?
A.
When an object is at rest
B.
When an object is sliding
C.
When an object is rolling
D.
When an object is in free fall
Show solution
Solution
The maximum frictional force occurs when an object is at rest, just before it starts to slide, which is characterized by static friction.
Correct Answer:
A
— When an object is at rest
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Q. In which scenario would the frictional force be zero?
A.
A block sliding down a frictionless ramp.
B.
A block at rest on a flat surface.
C.
A block moving on a rough surface.
D.
A block in free fall.
Show solution
Solution
Frictional force is zero when there is no contact force opposing the motion, such as a block sliding down a frictionless ramp.
Correct Answer:
A
— A block sliding down a frictionless ramp.
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Q. In which scenario would the Gibbs Free Energy of a system be at its minimum?
A.
At equilibrium
B.
At the start of a reaction
C.
At maximum temperature
D.
At maximum pressure
Show solution
Solution
The Gibbs Free Energy of a system is at its minimum at equilibrium, indicating stability.
Correct Answer:
A
— At equilibrium
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Q. In which scenario would total internal reflection NOT occur?
A.
Light traveling from glass to air at a steep angle.
B.
Light traveling from water to air at a shallow angle.
C.
Light traveling from diamond to air at a high angle.
D.
Light traveling from air to water at any angle.
Show solution
Solution
Total internal reflection cannot occur when light travels from a rarer medium (air) to a denser medium (water) at any angle, as it will always refract.
Correct Answer:
D
— Light traveling from air to water at any angle.
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Q. In which scenario would ΔG = 0?
A.
At the start of a reaction.
B.
At equilibrium.
C.
When the reaction is spontaneous.
D.
When the reaction is non-spontaneous.
Show solution
Solution
ΔG = 0 occurs at equilibrium, where the forward and reverse reactions occur at the same rate.
Correct Answer:
B
— At equilibrium.
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Q. In which scenario would ΔG be equal to ΔH?
A.
At absolute zero.
B.
When ΔS = 0.
C.
For a spontaneous reaction.
D.
For an endothermic reaction.
Show solution
Solution
ΔG equals ΔH when the entropy change (ΔS) is zero, indicating no change in disorder.
Correct Answer:
B
— When ΔS = 0.
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Q. In which scenario would ΔG be zero?
A.
At standard conditions
B.
At equilibrium
C.
In a spontaneous reaction
D.
In a non-spontaneous reaction
Show solution
Solution
ΔG is zero at equilibrium, indicating no net change in the concentrations of reactants and products.
Correct Answer:
B
— At equilibrium
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Q. In which scheduling algorithm does each process get a fixed time slice?
A.
Shortest Job First
B.
Round Robin
C.
First-Come, First-Served
D.
Multilevel Queue
Show solution
Solution
Round Robin scheduling allocates a fixed time slice to each process, allowing for fair CPU time distribution.
Correct Answer:
B
— Round Robin
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Q. In which state of matter do molecules have the least freedom of movement?
A.
Solid
B.
Liquid
C.
Gas
D.
Plasma
Show solution
Solution
In solids, molecules are closely packed and have the least freedom of movement.
Correct Answer:
A
— Solid
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Q. In which state of matter do particles have the highest energy? (2023)
A.
Solid
B.
Liquid
C.
Gas
D.
Bose-Einstein Condensate
Show solution
Solution
Gas particles have the highest energy compared to solids and liquids, allowing them to move freely and occupy more space.
Correct Answer:
C
— Gas
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Q. In which state of matter do particles have the highest kinetic energy?
A.
Solid
B.
Liquid
C.
Gas
D.
Plasma
Show solution
Solution
Plasma has the highest kinetic energy as the particles are highly energized and ionized.
Correct Answer:
D
— Plasma
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Q. In which state of matter do particles have the least amount of energy?
A.
Solid
B.
Liquid
C.
Gas
D.
Plasma
Show solution
Solution
Particles in a solid have the least amount of energy compared to liquids, gases, and plasma.
Correct Answer:
A
— Solid
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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!