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State PCS PYQPrelims 2024

UPPCS · Question 27

Given below are two statements, one labelled as Assertion (A) and the other as Reason (R). Assertion (A): Relative humidity decreases with increasing air temperature. Reason (R): Absolute humidity increases with increasing evaporation. Select the correct answer using the code given below.

  1. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
  2. (A) is false, but (R) is true
  3. Both (A) and (R) are true and (R) is the correct explanation of (A)
  4. (A) is true, but (R) is false
Show answer & explanation

Answer: (A) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

Explanation

Warmer air can hold more moisture, so RH falls as temperature rises; more evaporation adds vapour, raising absolute humidity. Both true but unrelated.