Density of a gas is found to be 5.46 g/dm3 at 27∘C at 2 bar pressure. What will be its density at STP?
A
3.0g dm−3
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B
5.0g dm−3
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C
6.0g dm−3
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D
10.82g dm−3
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Solution
The correct option is A3.0g dm−3 As We Know, P=nVRT=mV×RTM=dRTM,
Because mV=d(density)
or d=PMRTord∝PT ⇒d1d2=P1P2×T2T1ord2=d1×P2×T1P1×T2 ⇒d2=5.46×1×3002×273=3.0g dm−3
Hence, correct option is (a).