States of Matter 1 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:
- In isothermal expansion, $p V_{m}=K$ (constant)
This relation is plotted in graph ’ $\mathrm{C}$ '
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:
