Practice Questions for Assertion & Reason | Logical Reasoning (LR) and Data Interpretation (DI) - CAT PDF Download

Q1: Assertion (A): Birds have feathers.
Reason (R): Feathers help birds to fly.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Feathers indeed help birds fly, as they provide lift and control during flight.

Q2: Assertion (A): The Earth orbits the Sun.
Reason (R): The Sun is much larger than the Earth.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. The Earth’s orbit around the Sun is due to the Sun’s gravitational pull, which is possible because the Sun is much larger than the Earth.

Q3: Assertion (A): Plants conduct photosynthesis.
Reason (R): Photosynthesis is essential for plant growth.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Photosynthesis is a vital process for plant growth and involves the conversion of sunlight into energy.

Q4: Assertion (A): Water boils at 100 degrees Celsius at sea level.
Reason (R): Atmospheric pressure affects the boiling point of water.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. The boiling point of water varies with changes in atmospheric pressure, and at sea level, it boils at 100 degrees Celsius.

Q5: Assertion (A): Oxygen is necessary for combustion.
Reason (R): Combustion is a chemical reaction involving the release of energy.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Oxygen is a crucial component of combustion, which is indeed a chemical reaction releasing energy.

Q6: Assertion (A): Metal objects expand when heated.
Reason (R): Heating increases the kinetic energy of metal atoms.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Heating metal objects increases the kinetic energy of their atoms, causing expansion.

Q7: Assertion (A): The Moon has gravitational pull.
Reason (R): Gravity is a fundamental force of nature.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. The Moon’s gravitational pull is due to the fundamental force of gravity.

Q8: Assertion (A): Sound travels faster in solids than in gases.
Reason (R): Solids have a higher density than gases.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Sound travels faster in denser materials, such as solids, due to the closer arrangement of particles.

Q9: Assertion (A): Adding salt to water lowers its freezing point.
Reason (R): Salt disrupts the formation of ice crystals in water.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Adding salt lowers the freezing point of water by interfering with the formation of ice crystals.

Q10: Assertion (A): Human beings require oxygen to survive.
Reason (R): Oxygen is essential for cellular respiration, which produces
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Sol: Both the assertion and reason are true. Humans require oxygen for cellular respiration, a process that produces energy necessary for survival.