States of Matter - Result Question 5
5. The combination of plots which does not represent isothermal expansion of an ideal gas is
(2019 Main, 12 Jan II)
(A)
(B)
(C)
(D)
(a) $(A)$ and $(C)$
(b) $(B)$ and $(C)$
(c) $(B)$ and $(D)$
(d) $(A)$ and $(D)$
Show Answer
Solution:
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:
BETA
