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Question

Which of the following gases will have density of 1.8 g L1 at 760 torr pressure and 27C ?
(Given R=0.082 L atm K 1 mol1, 760 torr=1 atm,0C=273 K)

A
O2
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B
CO2
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C
NH3
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D
SO2
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Solution

The correct option is B CO2
We know that
PV=nRTPV=mMRT (n=mM)PM=mVRTM=dRTP (d=mV)M=1.8×0.082×300144 g
The gas will be CO2.

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