Which of the following gases will have a density of 1.9g L−1 at 1520 torr pressure and 87∘C?
A
CO2
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B
N2
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C
O2
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D
SO2
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Solution
The correct option is BN2 Given:
Density, d=1.9g L−1
Pressure of the gas, P=1520torr=2atm T=87∘C=360K
Using density relation of ideal gas equation, PM=dRT
where M is the molar mass of the gas M=dRTP=1.9×0.0821×3602=28g ∴ The gas will be N2.