Which of the following gas always shows positive deviations from Boyle's law even at ordinary temperatures
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a
Hydrogen
b
Oxygen
c
Nitrogen
d
Methane
answer is A.
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Detailed Solution
Hydrogen and helium are small molecules. In these two gases always repulsions dominate;Z>1, PV>nRT ;Vanderwaal constant 'a' can be neglected;For one mole of gasPV-b=RT ; PV-Pb=RT; PV=Pb+RT; PV>RT; Z>1;Z=PVRT