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The velocity of sound in a gas at temperature 27°C is V then in the same gas its velocity will be 2V at temperature:

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54°C

327°C

927°C

108°C

answer is C.

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Detailed Solution

In a gas,

$V = \sqrt{\frac{γRT}{M}} \Rightarrow V \propto \sqrt{T}$

$\Rightarrow \frac{V}{2 V} = \sqrt{\frac{300}{T}} \Rightarrow T = 1200 K$

$∴ T = 927^{0} C$

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