Previous year MCQs

General science UPPSC 2021 GS-I
Question

Which of the following is NOT correctly matched ?

Answer & Solution

Answer: (Detailed Solution Below)

Option C: Souring of milk - Nitric acid

Detailed Solution:

The correct answer is “Souring of milk - Nitric acid”.
Phenomenon/Substance Compound/Acid
Acid present in vinegar Acetic acid
Compound present in bones Calcium phosphate
Souring of milk Lactic acid
Acid present in gastric juice Hydrochloric acid

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Sodium vapor lamps are used in road lighting because
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1. Nuclear fusion
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Codes:
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  2. B) 1, 2 and 3
  3. C) 1 and 4
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List-I - List-II

A. Sour Milk - 1. Malic acid
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Code:
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Reason (R) : Absolute humidity increases with increasing evaporation.

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