Question

Out of the following gases under similar condition of temperature and pressure, the velocity of sound will be maximum in

• A. hydrogen
• B. nitrogen
• C. oxygen
• D. chlorine

Answer 1

Answer: (A)

hydrogen

Answer 2

Velocity of the sound in gas $v = \sqrt{\frac{\gamma RT}{M}}$ where the symbols have their usual meanings. All the given gases are diatomic and are at same temperature, $\therefore v \propto \frac{1}{\sqrt{M}}$