WBJEE 2021 Physics and Chemistry Solved Paper
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CATEGORY - II (Q71 to Q75)
Carry 2 marks each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ½ mark will be deducted.
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Question : 72 of 80
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The atomic masses of helium and neon are 4.0 and 20.0 amu respectively. The value of the de Broglie wavelength of helium gas at –73°C is M times the de Broglie wavelength of neon at 727°C. The value of M is
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