Assertion and Reason (1 Mark)

MCQ 11 Mark

Assertion (A): On humid days, our clothes take longer to dry.
Reason (R): Humid air contains more water vapour, which slows down the evaporation process.

✓
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.

Answer

Correct option: A.

Both (A) and (R) are true and (R) is the correct explanation of (A).

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MCQ 21 Mark

Assertion (A): Automated Weather Stations (AWS) require human intervention.
Reason (R): AWS measures and records weather data automatically.

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.
✓
(A) is false but (R) is true.

Answer

Correct option: D.

(A) is false but (R) is true.

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MCQ 31 Mark

Assertion (A): High humidity makes the air feel uncomfortable.
Reason (R): Sweat evaporates quickly in high humidity.

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).
✓
(A) is true but (R) is false.
D
(A) is false but (R) is true.

Answer

Correct option: C.

(A) is true but (R) is false.

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MCQ 41 Mark

Assertion (A): The Indian Meteorological Department was established in 1875.
Reason (R): Its motto is “From the sun arises the rain.”

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.

Answer

self

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MCQ 51 Mark

Assertion (A): Pine cones open in dry conditions.
Reason (R): Pine cones close to protect their seeds from rain.

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.

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MCQ 61 Mark

Assertion (A): Acclimatisation is important for high-altitude travel.
Reason (R): The body needs time to adapt to lower oxygen levels.

✓
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.

Answer

Correct option: A.

Both (A) and (R) are true and (R) is the correct explanation of (A).

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MCQ 71 Mark

Assertion (A): Anemometers measure wind direction.
Reason (R): Wind direction is indicated by a wind vane.

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.
✓
(A) is false but (R) is true.

Answer

Correct option: D.

(A) is false but (R) is true.

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MCQ 81 Mark

Assertion (A): Wet clothes dry faster in high humidity.
Reason (R): High humidity means the air is already saturated with moisture.

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.
✓
(A) is false but (R) is true.

Answer

Correct option: D.

(A) is false but (R) is true.

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MCQ 91 Mark

Assertion (A): A barometer measures atmospheric pressure.
Reason (R): Atmospheric pressure is the weight of the air above us.

✓
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.

Answer

Correct option: A.

Both (A) and (R) are true and (R) is the correct explanation of (A).

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MCQ 101 Mark

Assertion (A): The troposphere is the layer where weather occurs.
Reason (R): The troposphere is the lowest layer of the atmosphere.

✓
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.

Answer

Correct option: A.

Both (A) and (R) are true and (R) is the correct explanation of (A).

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Social Studies Assertion and Reason (1 Mark)

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