Question : Of the options listed below, the speed of sound is highest in _____ at 25°C.
Option 1: Ethanol
Option 2: Aluminium
Option 3: Oxygen
Option 4: Hydrogen
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Correct Answer: Aluminium
Solution : The correct option is Aluminium.
The speed of sound is highest in Aluminium at 25°C among the options provided. This is because the material's stiffness and density influence the speed of sound. Aluminum has a relatively high stiffness and low density, making sound waves travel faster than ethanol, hydrogen and oxygen.
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