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The speed of sound in oxygen at STP is approximately (take R=8.3 J K⁻¹ mol⁻¹ and γ=1.4)

Asked in JEE Main 31st Jan 2nd Shift 2024 · Speed of sound in a gas

• (1) 341 m s⁻¹
• (2) 310 m s⁻¹
• (3) 325 m s⁻¹
• (4) 333 m s⁻¹

Step-by-step solution

Why the other options are wrong

• (1) This is the speed in air, whose mean molar mass is smaller.
• (3) Uses M=0.030 kg mol⁻¹.
• (4) Uses γ=1.67 or T=300 K.

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