1.

The temperature at which the speed of sound in air becomes double of its value at \[{{27}^{o}}C\] is [CPMT 1997; UPSEAT 2000; DPMT 2003]

A. \[{{54}^{o}}C\]  
B. \[{{327}^{o}}C\]
C. Ultrasonic wave  
D. \[-{{123}^{o}}C\]
Answer» D. \[-{{123}^{o}}C\]


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