Undergraduate MCQ & Objective Questions
The undergraduate level is a crucial phase in a student's academic journey, especially for those preparing for school and competitive exams. Mastering this stage can significantly enhance your understanding and retention of key concepts. Practicing MCQs and objective questions is essential, as it not only helps in reinforcing knowledge but also boosts your confidence in tackling important questions during exams.
What You Will Practise Here
Fundamental concepts in Mathematics and Science
Key definitions and theories across various subjects
Important formulas and their applications
Diagrams and graphical representations
Critical thinking and problem-solving techniques
Subject-specific MCQs designed for competitive exams
Revision of essential topics for better retention
Exam Relevance
Undergraduate topics are integral to various examinations such as CBSE, State Boards, NEET, and JEE. These subjects often feature a mix of conceptual and application-based questions. Common patterns include multiple-choice questions that assess both theoretical knowledge and practical application, making it vital for students to be well-versed in undergraduate concepts.
Common Mistakes Students Make
Overlooking the importance of understanding concepts rather than rote memorization
Misinterpreting questions due to lack of careful reading
Neglecting to practice numerical problems that require application of formulas
Failing to review mistakes made in previous practice tests
FAQs
Question: What are some effective strategies for solving undergraduate MCQ questions?Answer: Focus on understanding the concepts, practice regularly, and review your answers to learn from mistakes.
Question: How can I improve my speed in answering objective questions?Answer: Time yourself while practicing and gradually increase the number of questions you attempt in a set time.
Start your journey towards mastering undergraduate subjects today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Your success is just a question away!
Q. What is the primary process involved in the formation of a colloidal solution? (2022)
A.
Evaporation
B.
Condensation
C.
Dispersion
D.
Sublimation
Show solution
Solution
Colloidal solutions are formed by the dispersion of fine particles in a medium, which is the process of dispersion.
Correct Answer:
C
— Dispersion
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Q. What is the primary producer in a freshwater ecosystem? (2022)
A.
Fish
B.
Algae
C.
Fungi
D.
Bacteria
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Solution
Algae are the primary producers in a freshwater ecosystem as they perform photosynthesis.
Correct Answer:
B
— Algae
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Q. What is the primary producer in a terrestrial ecosystem? (2019)
A.
Herbivores
B.
Carnivores
C.
Plants
D.
Decomposers
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Solution
Plants are the primary producers in terrestrial ecosystems as they convert sunlight into energy through photosynthesis.
Correct Answer:
C
— Plants
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Q. What is the primary product of nuclear fission? (2019)
A.
Energy
B.
Neutrons
C.
Protons
D.
Alpha particles
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Solution
The primary product of nuclear fission is energy, along with neutrons and smaller nuclei.
Correct Answer:
A
— Energy
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Q. What is the primary product of the electrolysis of water? (2023)
A.
Hydrogen
B.
Oxygen
C.
Hydrogen Peroxide
D.
Ozone
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Solution
The primary products of the electrolysis of water are hydrogen and oxygen gases.
Correct Answer:
A
— Hydrogen
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Q. What is the primary product of the fission of Uranium-235? (2019)
A.
Helium
B.
Neutrons
C.
Barium and Krypton
D.
Carbon
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Solution
The fission of Uranium-235 primarily produces Barium and Krypton along with additional neutrons.
Correct Answer:
C
— Barium and Krypton
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Q. What is the primary product of the fusion of hydrogen nuclei in stars? (2022)
A.
Helium
B.
Carbon
C.
Oxygen
D.
Nitrogen
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Solution
The primary product of hydrogen fusion in stars is helium, which occurs through the proton-proton chain reaction.
Correct Answer:
A
— Helium
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Q. What is the primary product of the fusion of hydrogen nuclei? (2022)
A.
Helium
B.
Carbon
C.
Oxygen
D.
Deuterium
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Solution
The primary product of the fusion of hydrogen nuclei (protons) is helium, along with the release of energy.
Correct Answer:
A
— Helium
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Q. What is the primary product of the reaction between hydrogen and chlorine? (2019)
A.
Hydrochloric acid
B.
Hydrogen chloride
C.
Chlorine gas
D.
Water
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Solution
The primary product of the reaction between hydrogen and chlorine is hydrogen chloride (HCl).
Correct Answer:
B
— Hydrogen chloride
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Q. What is the primary product of the thermal decomposition of calcium carbonate? (2019)
A.
Calcium oxide
B.
Calcium hydroxide
C.
Calcium bicarbonate
D.
Calcium chloride
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Solution
The thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2).
Correct Answer:
A
— Calcium oxide
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Q. What is the primary product when aluminum reacts with hydrochloric acid? (2020)
A.
AlCl3
B.
H2
C.
Al(OH)3
D.
Al2Cl6
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Solution
When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).
Correct Answer:
B
— H2
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Q. What is the primary product when calcium reacts with oxygen? (2022)
A.
Calcium oxide
B.
Calcium hydroxide
C.
Calcium carbonate
D.
Calcium peroxide
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Solution
Calcium reacts with oxygen to form calcium oxide (CaO).
Correct Answer:
A
— Calcium oxide
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Q. What is the primary product when lithium reacts with nitrogen? (2022)
A.
Lithium nitride
B.
Lithium oxide
C.
Lithium hydroxide
D.
Lithium carbonate
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Solution
Lithium reacts with nitrogen to form lithium nitride (Li3N).
Correct Answer:
A
— Lithium nitride
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Q. What is the primary product when potassium permanganate (KMnO4) is reduced in acidic medium? (2019)
A.
MnO2
B.
Mn2+
C.
MnO4-
D.
KMnO4
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Solution
In acidic medium, potassium permanganate (KMnO4) is reduced to Mn2+.
Correct Answer:
B
— Mn2+
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Q. What is the primary purpose of petals in a flower? (2023)
A.
To produce seeds
B.
To attract pollinators
C.
To support the flower
D.
To protect the ovary
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Solution
Petals are often brightly colored and serve to attract pollinators to the flower.
Correct Answer:
B
— To attract pollinators
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Q. What is the primary purpose of reproduction in organisms? (2020)
A.
To increase genetic diversity
B.
To maintain homeostasis
C.
To produce energy
D.
To ensure survival of the species
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Solution
Reproduction ensures the continuation of a species by producing offspring.
Correct Answer:
D
— To ensure survival of the species
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Q. What is the primary purpose of reproductive health education? (2020)
A.
To promote early marriage
B.
To prevent sexually transmitted diseases
C.
To encourage multiple partners
D.
To discourage family planning
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Solution
Reproductive health education aims to inform individuals about safe practices, including the prevention of sexually transmitted diseases.
Correct Answer:
B
— To prevent sexually transmitted diseases
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Q. What is the primary purpose of using recombinant DNA technology in medicine? (2019)
A.
To create vaccines
B.
To produce antibiotics
C.
To synthesize hormones
D.
All of the above
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Solution
Recombinant DNA technology is used to create vaccines, produce antibiotics, and synthesize hormones like insulin.
Correct Answer:
D
— All of the above
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Q. What is the primary purpose of using restriction enzymes in biotechnology? (2020)
A.
To amplify DNA
B.
To cut DNA at specific sequences
C.
To insert genes into plasmids
D.
To sequence DNA
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Solution
Restriction enzymes are proteins that cut DNA at specific sequences, which is essential for cloning and genetic engineering.
Correct Answer:
B
— To cut DNA at specific sequences
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Q. What is the primary reason for the brittleness of certain materials? (2023)
A.
High ductility
B.
Low atomic bonding energy
C.
High atomic bonding energy
D.
High elasticity
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Solution
Brittleness is primarily due to high atomic bonding energy, which prevents the material from deforming plastically.
Correct Answer:
C
— High atomic bonding energy
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Q. What is the primary reason for the high compressibility of gases?
A.
Large intermolecular spaces
B.
Strong intermolecular forces
C.
Low temperature
D.
High pressure
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Solution
Gases are highly compressible due to large intermolecular spaces between particles.
Correct Answer:
A
— Large intermolecular spaces
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Q. What is the primary reason for the high electronegativity of halogens? (2020)
A.
Large atomic size
B.
High ionization energy
C.
Low electron affinity
D.
High atomic mass
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Solution
Halogens have high electronegativity due to their high ionization energy, which allows them to attract electrons effectively.
Correct Answer:
B
— High ionization energy
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Q. What is the primary reason for the increase in human population over the last century? (2023)
A.
Increased birth rates
B.
Decreased death rates
C.
Improved healthcare
D.
All of the above
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Solution
The increase in human population is attributed to a combination of increased birth rates, decreased death rates, and improved healthcare.
Correct Answer:
D
— All of the above
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Q. What is the primary reason for the increase in ionization energy across a period in p-block elements? (2023)
A.
Increase in atomic size
B.
Increase in nuclear charge
C.
Decrease in shielding effect
D.
Increase in electron affinity
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Solution
The increase in nuclear charge across a period leads to higher ionization energy.
Correct Answer:
B
— Increase in nuclear charge
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Q. What is the primary reason for the phenomenon of plastic deformation in materials? (2023)
A.
Elastic limit
B.
Yield strength
C.
Ultimate tensile strength
D.
Ductility
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Solution
Plastic deformation occurs when the material is subjected to stress beyond its yield strength.
Correct Answer:
B
— Yield strength
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Q. What is the primary reason for the stability of a nucleus? (2022)
A.
Number of protons
B.
Number of neutrons
C.
Ratio of neutrons to protons
D.
Size of the nucleus
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Solution
The stability of a nucleus is primarily determined by the ratio of neutrons to protons, which affects the balance of forces within the nucleus.
Correct Answer:
C
— Ratio of neutrons to protons
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Q. What is the primary reason for the use of soft iron in electromagnets? (2023)
A.
High electrical conductivity
B.
Low cost
C.
High magnetic permeability
D.
Low density
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Solution
Soft iron is used in electromagnets because it has high magnetic permeability, allowing it to be easily magnetized and demagnetized.
Correct Answer:
C
— High magnetic permeability
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Q. What is the primary reason for the variable oxidation states of transition metals?
A.
Presence of d-electrons
B.
High atomic mass
C.
Low ionization energy
D.
High electronegativity
Show solution
Solution
The presence of d-electrons allows transition metals to exhibit variable oxidation states.
Correct Answer:
A
— Presence of d-electrons
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Q. What is the primary reason that gases can be compressed more than liquids or solids?
A.
High density
B.
Low density
C.
Large intermolecular spaces
D.
Strong intermolecular forces
Show solution
Solution
Gases can be compressed more than liquids or solids because they have large intermolecular spaces.
Correct Answer:
C
— Large intermolecular spaces
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Q. What is the primary role of auxins in apical dominance? (2019)
A.
Promote lateral bud growth
B.
Inhibit lateral bud growth
C.
Stimulate root growth
D.
Enhance leaf expansion
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Solution
Auxins inhibit the growth of lateral buds, maintaining apical dominance and directing growth towards the apex.
Correct Answer:
B
— Inhibit lateral bud growth
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