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The ratio of de-Broglie wavelength of molecules of hydrogen and helium in two gas jars kept separately at temperature $27^{0} C$ and $127^{0} C$ respectively is

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Correct option is D

rms velocity of the gas is 3kTm momentum p=m3kTm= 3kTmde-Broglie wavelength Î»=hp=h3kTmÎ»HÎ»He=mHemHTHeTH=42400300=83

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The ratio of de-Broglie wavelength of molecules of hydrogen and helium in two gas jars kept separately at temperature 270C and 1270Crespectively is

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The ratio of de-Broglie wavelength of molecules of hydrogen and helium in two gas jars kept separately at temperature $27^{0} C$ and $127^{0} C$ respectively is