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Question

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

(i) increasing pressure on hydrogen contained in a closed container

(ii) some hydrogen gas leaking out of the container

(iii) increasing the volume of the container of hydrogen gas

(iv) adding more hydrogen gas to the container without increasing the volume of the container

(a) (i) and (iii) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

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Solution

(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 the 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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