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Q.

Velocity of sound is minimum in which of the following gasses:


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a

Nitrogen

b

Hydrogen

c

Air

d

Carbon dioxide 

answer is D.

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Detailed Solution

Concept: The velocity of sound is the distance traveled per unit time by a sound wave as it propagates through an elastic material. Carbon dioxide is denser than air (at the same temperature and pressure) because the individual particles are more massive on average, not because they are close together. They move incredibly slowly for a given amount of kinetic energy. As a result, the velocity of sound in carbon dioxide is the slowest.
Hence, the correct option is 4.
 
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