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The figure below shows the plot of PV/nT versus P for oxygen gas at two different temperatures

Read the following statements concerning the curves given below

i)   The dotted line corresponds to the 'ideal' gas behaviour
ii)    T1 > T2
iii)    The value of PV/nT at the point, where the curves meet on the y-axis is the same for all gases Which of the above statement is true?

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i only

all of these

i and ii

none of these

answer is C.

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Detailed Solution

PV = nRT

$\therefore \frac{{PV}}{{nT}} = R$

For ideal gas, R is constant which is represented by dotted line.

At high temperature and low pressure, a real gas behaves like an ideal gas. So as temperature T increases and pressure decreases the graph of PV/T versus P approaches the dotted line. Hence T₁ > T₂.

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