JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2014

  • question_answer
    The figure below shows the plot of \[{{T}_{1}}>{{T}_{2}}\]\[\frac{pV}{nT}\]p for oxygen gas at two different temperatures. Read the following statements concerning the above curves. (i) The dotted line corresponds to the ideal gas behavior . (ii) \[4\times {{10}^{3}}A{{m}^{-1}}\] (iii)The value of \[\text{1}{{0}^{-\text{2}}}\] at the point, where the curves meet on the y-axis is the same for all edges. Which of the above statement is true?

    A)  Only (i)               

    B) (i) and (ii)

    C)  (i), (ii) and (iii)   

    D) None of these

    Correct Answer: C

    Solution :

                    (i) The dotted line in -the diagram shows that there is no deviation in the value of \[9.13\times {{10}^{3}}N/{{m}^{2}}\] for different temperature \[{{T}_{1}}\] and \[{{T}_{2}}\] for increasing pressure, so this gas behaves ideally. Hence, dotted line corresponds to ideal gas behavior . (ii) We know that at high temperature, the deviation of the gas is less and at low temperature the deviation of gas is more. In the graph, deviation for \[\text{5}.\text{25}\times \text{1}{{0}^{\text{3}}}\text{min}\] is greater than for \[2l=\int_{\pi /6}^{\pi /3}{1dx}=[x]_{\pi /6}^{\pi /3}\]. Thus, \[\Rightarrow \] (iii) Since, the two curves intersect at dotted line, so the value of\[l=\frac{1}{2}\left( \frac{\pi }{3}-\frac{\pi }{6} \right)=\frac{\pi }{12}\] at that point on the y-axis is same for all gases.                


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