Answer:
(c) (ii) and (iii) are the correct options because
In option (ii) hydrogen gas leaking from the container
leaves some vacant space inside the container. So, hydrogen gas molecules
inside the container occupy all the space available and the distance between
the molecules of hydrogen gas will be increased.
In option (iii) on increasing the volume of the container
of hydrogen gas, more space will be available inside the container and hydrogen
gas molecules will occupy all the space available and hence distance between
the molecules will be increased.
In option (i) on increasing pressure, hydrogen molecules
will come closer and the distance between them will be decreased,
In option (iv) more hydrogen gas molecules are available
in less volume, so the distance between them will be decreased.
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