Previous year MCQs

General science UPPSC 2024 GS-I
Question

Given below are two statements, one is 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 from the codes given below:

Answer & Solution

Answer: (Detailed Solution Below)

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

Detailed Solution:

The correct answer is “Both(A) and (R) are true, but (R) is not the correct explanation of(A).”.
Absolute humidity is the amount of water vapor in a given volume of air, while relative humidity is the amount of water vapor in the air relative to the maximum amount it can hold.

As the air temperature increases, the maximum amount of moisture the air can hold also increases, but if the amount of water vapor remains the same, the relative humidity will decrease.

As evaporation occurs, more water vapor is added to the air, which leads to an increase in absolute humidity.

Similar Questions:

Match the columns with Lists-I and II and select the correct answer with the help of code given below:
List-I - List-II

A. High Velocity - 1. Mach
B. Wavelength - 2. Angstrom
C. Pressure - 3. Pascal
D. Energy - 4. Joule
Code:

A B C D
  1. A) 2 1 3 4
  2. B) 1 2 4 3
  3. C) 1 2 3 4
  4. D) 2 1 4 3
Write in descending order the following States on the basis of their population as per Census, 2011:

1. Bihar 2. Andhra Pradesh
3. Uttar Pradesh 4. West Bengal

Choose the correct answer with the help of the following codes:
  1. A) 3,4,1,2
  2. B) 1,3,2,4
  3. C) 1,3,4,2
  4. D) 3,1,4,2
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1. The Justice Party opposed Congress by calling it a Brahmin dominated organisation.
2. It claimed the same communal representation for non-Brabmins as the Morley-Minto reforms had given to Muslims.

Which of the above statements is/are correct?
  1. A) Both 1 and 2
  2. B) Neither 1 nor 2
  3. C) Only 1
  4. D) Only 2
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A) : Jute is an indigenous plant of India.
Reason (R) : Jute is a Kharif crop sown from February to June and harvested from July to October.

Select the correct answer from the codes given below:
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  2. B) (A) is false, but (R) is trues
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  1. A) volume increases
  2. B) volume decreases
  3. C) mass increases
  4. D) mass decreases
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): Development is being defined as improving living standards and welfare.
Reason (R): Growth in per capita income is not a sufficient measure of development.

Select the correct answer from the codes given below:
  1. A) Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B) (A) is false, but (R) is true
  3. C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
  4. D) (A) is true, but (R) is false
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  2. B) Solar cells
  3. C) Dynamo
  4. D) Mini nuclear reactor
Which one of the following pairs is not correctly matched?
Hormone - Function
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  2. B) Melatonin - Regulation of sleep
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Desert plants have longer root system because:
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Match List I with List II and select the correct answer from the code given below:
List-I - List-II

A. Hormone - 1. Lipase
B. Enzyme - 2. Testosterone
C. Phospholipid - 3. Lecithin
D. Polymer - 4. Polyethylene

Code:
A B C D
  1. A) 2 1 3 4
  2. B) 4 1 2 2
  3. C) 2 3 4 2
  4. D) 1 2 3 1
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  3. C) Nuclear fusion
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  2. B) Sulphur
  3. C) Potassium
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