25 Must Solve Science based Assertion Reasoning Questions in MBA CET

MBA CET 2026: Assertion-Reasoning | Practice Set

MBA CET 2026: Assertion & Reasoning Mastery

Q1. Assertion (A): Ice floats on water. Reason (R): The density of ice is less than that of water.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: Water expands as it freezes, decreasing its density. Objects with lower density than the fluid float.
Difficulty: Easy
Q2. Assertion (A): Plants appear green in color. Reason (R): Chlorophyll reflects green light and absorbs other wavelengths.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: Chlorophyll reflects the green wavelength while absorbing red and blue for photosynthesis.
Difficulty: Easy
Q3. Assertion (A): A body continues to remain in motion unless acted upon by an external force. Reason (R): Friction is always present in real life situations.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 2

Rationale: The assertion is Newton’s First Law. The reason is a fact of reality, but it does not explain the law of inertia.
Difficulty: Medium
Q4. Assertion (A): When a man is standing in a lift moving with uniform speed, he does not find any apparent change in his weight. Reason (R): The reaction of the floor of the lift is equal to his weight.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: With uniform speed (zero acceleration), the normal reaction equals the weight. Apparent weight changes only during acceleration.
Difficulty: Medium
Q5. Assertion (A): Sound travel slower in gases than in solids. Reason (R): Gases have a lower density than solid.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 2

Rationale: Sound is faster in solids due to higher elasticity (bulk modulus), not density differences.
Difficulty: Hard
Q6. Assertion (A): Steel is used in the construction of buildings and bridges. Reason (R): Steel is more elastic and its elastic limit is high.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: Steel’s high Young’s modulus allows it to support heavy loads and return to its original shape.
Difficulty: Medium
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MBA CET 2026: Assertion-Reasoning | 20-Question Practice Set

MBA CET 20 Practice Assertion & Reasoning

Q1. Given below are two statements, one is labelled as Assertion (A) and the other labelled as reason (R) Assertion (A): Pressure increases as depth increases in a liquid. Reason (R): The weight of the liquid column above increases with depth. Choose the correct option:
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: Pressure in a liquid is given by $P = h\rho g$. As depth ($h$) increases, the weight of the liquid column pressing down increases, thus increasing pressure.
Q2. Given below are two statements, one is labelled as Assertion (A) and the other labelled as reason (R) Assertion (A): Metals are good conductors of electricity. Reason (R): Metals have free electrons that can move easily. Choose the correct option:
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: The presence of delocalized “free” electrons in the metallic lattice allows for the flow of electric current when a potential difference is applied.
Q3. Given below are two statements, one is labelled as Assertion (A) and the other labelled as reason (R) Assertion (A): The sky appears blue during the day. Reason (R): Blue light is scattered more than other colors due to its shorter wavelength. Choose the correct option:
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 1

Rationale: Rayleigh scattering states that shorter wavelengths (blue) scatter more effectively than longer wavelengths (red) when interacting with atmospheric particles.
Q4. Given below are two statements, one is labelled as Assertion (A) and the other labelled as reason (R) Assertion (A): A heavy object falls faster than a light object in vacuum. Reason (R): In vacuum, there is no air resistance. Choose the correct option:
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is correct but R is false
  • 4. A is incorrect but R is correct
  • 5. Both A and R are not correct
Correct Option: 4

Rationale: The Assertion is false. In a vacuum, all objects fall at the same rate ($g$) regardless of mass. The Reason is true, but it contradicts the false assertion.
Q5. Assertion (A): When lightning strikes, the sound is heard a little after the flash is seen. Reason (R): The velocity of light is greater than that of the sound.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: Light travels at $3 \times 10^8$ m/s, whereas sound travels at ~340 m/s. We see the flash almost instantly, but the sound takes time to reach us.
Q6. Assertion (A): A ship rises as it enters the sea from a river. Reason (R): The density of sea water is higher as compared to river water.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: Sea water is denser due to salt. Higher density provides greater upthrust/buoyancy, making the ship displace less volume and rise higher.
Q7. Assertion (A): Sprouting should not be done before consuming the grains. Reason (R): Sprouting kills many vital vitamins.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 5
Rationale: Both are false. Sprouting is highly recommended as it actually increases the vitamin content and bioavailability of nutrients in grains.
Q8. Assertion (A): Alcohol rather than mercury is used in a thermometer to measure a temperature of -60°C. Reason (R): Alcohol has a lower freezing point than mercury.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: Mercury freezes at -39°C. Alcohol freezes at ~ -114°C, making it suitable for measuring extremely low temperatures where mercury would solidify.
Q9. Assertion (A): Pipes carrying water often burst in cold countries during severe winter. Reason (R): Water expands on freezing.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: Due to the anomalous expansion of water, it increases in volume when it turns to ice. The resulting pressure inside the pipes causes them to burst.
Q10. Assertion (A): An electric bulb makes a ‘bang’ when it is broken. Reason (R): The air inside the bulb rushes out immediately on breaking.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 3
Rationale: Assertion is true, but the Reason is false. There is a vacuum (or low-pressure inert gas) inside. When broken, outside air rushes in to fill the space, causing the sound.
Q11. Assertion (A): Salt is an ingredient used to cook food faster at higher altitudes. Reason (R): Temperature is lower at higher altitudes.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 2
Rationale: Both statements are true. However, R is not the correct explanation for A. Salt is used because it increases the boiling point of water, compensating for the lower atmospheric pressure which causes water to boil at lower temperatures.
Q12. Assertion (A): Carbon monoxide when inhaled causes death. Reason (R): Carbon monoxide combines with hemoglobin.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: CO has a higher affinity for hemoglobin than oxygen. It forms carboxy-hemoglobin, preventing the blood from transporting oxygen, leading to suffocation and death.
Q13. Assertion (A): It’s colder on mountains than it is on plains. Reason (R): When altitude decreases, so does the temperature.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 3
Rationale: Assertion is true, but the Reason is false. Temperature decreases as altitude increases (lapse rate).
Q14. Assertion (A): Inside the earth metals are present in molten state. Reason (R): Earth absorbs the sun’s rays.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 3
Rationale: Assertion is true due to internal geothermal heat and pressure. Reason is false as sun’s rays only affect the surface; the core is heated by radioactive decay and residual formation heat.
Q15. Assertion (A): AIDS does not have a vaccine. Reason (R): The AIDS virus alters its genetic code.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: The high mutation rate of the HIV virus (altering genetic code) makes it extremely difficult to create a stable vaccine that the immune system can recognize consistently.
Q16. Assertion (A): Clothes are not washed properly in hot water. Reason (R): Hard water contains many minerals.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 4
Rationale: Assertion is false (hot water usually cleans better). Reason is true; hard water contains calcium and magnesium minerals which react with soap to form scum.
Q17. Assertion (A): In India, females have higher life expectancy than the males. Reason (R): Females receive a better diet.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 5
Rationale: Both are false in the general historical context provided. While global trends show females live longer, historical Indian data often showed lower female expectancy due to social neglect.
Q18. Assertion (A): Appendix is a vestigial organ in human body. Reason (R): It does not participate in digestion.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: A vestigial organ is one that has lost its original ancestral function. Since the appendix no longer aids in human digestion (as it did for ancestors eating raw vegetation), it is vestigial.
Q19. Assertion (A): Himalayas used to lay under the sea. Reason (R): Fossils of various marine creatures are traced on the Himalayas.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: The Himalayas were formed by the collision of tectonic plates which pushed up the floor of the ancient Tethys Sea. Marine fossils confirm this history.
Q20. Assertion (A): Legumes revive the soil fertility. Reason (R): Microbes in the root nodules of legumes fix the atmospheric nitrogen.
  • 1. Both A and R are true and R is the correct explanation of A
  • 2. Both A and R are true but R is not the correct explanation of A
  • 3. A is true but R is false
  • 4. A is false but R is true
  • 5. Both A and R are false
Correct Option: 1
Rationale: Rhizobium bacteria in the root nodules of leguminous plants convert atmospheric nitrogen into nitrates, which enriches the soil.
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