Q. Which one of the following statements is not correct?
Answer: The velocity of sound in air decreases as the humidity increases
Notes: The velocity of sound in air is determined by the air itself and is not dependent upon the amplitude, frequency, or wavelength of the sound. The velocity of sound c depends on the temperature of air and not on the air pressure. Thus, velocity of sound in air increases with temperature and remains unaffected with increase of pressure. Therefore, statements 1, 2 and 4 are right. Only statement 3 is wrong. The only other factor that has any effect on the speed of sound in air is the amount of humidity in the air. An increase in the amount of humidity in the air increases the speed by a small amount.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 21 in General Studies Mock Test - 75 in above course in App.