States of Matter - Result Question 5

####5. The combination of plots which does not represent isothermal expansion of an ideal gas is

(A)

(C) (2019 Main, 12 Jan II)

$(B)$

$(D)$

(a) $(A)$ and $(C)$

(b) $(B)$ and $(C)$

(c) $(B)$ and $(D)$

(d) $(A)$ and $(D)$

Show Answer

Solution:

  1. In isothermal expansion, $p V _m=K$ (constant)

This relation is plotted in graph ’ $C$ '

Likewise, $\quad p=\frac{K}{V _m}$

This relation is plotted in graph " $A$ “.

Thus, graph $B$ and $D$ are incorrect.

For them the correct graphs are:

States of Matter $\mathbf{7 1}$



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