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a
work done on the gas is zero
b
density of the gas is constant
c
slope of line AB from the T-axis is inversely proportional to the number of moles of the gas
d
slope of line AB from the T-axis is directly proportional to the number of moles of the gas
answer is A.
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Detailed Solution
P-T graph is a straight line passing through origin. There fore.V = constant.∴Work done on the gas = 0.Further, ρ=mV∝1VVolume of the gas is constant. Therefore, density of gas is also constant.PV=nRTP=nRVTi.e., slope of P-T line ∝ n