Multiple choice general knowledge science & technology

Which of the statements is NOT correct?

  1. The velocity of sound in air increases with the increase of temperature

  2. The velocity of sound in air is independent of pressure

  3. The velocity of sound in air decreased as humidity increases

  4. The velocity of sound in air is not affected by the change in amplitude and frequency
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sound actually travels FASTER in humid air because water vapor is less dense than dry air (the molecular weight of H₂O is 18 vs N₂=28, O₂=32). Lower density means faster sound propagation, making statement C the incorrect one.

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