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Question

A balloon filled with ethylene (molecular formula C2H4) is pricked with a sharp point and quickly plunged into a tank of hydrogen at the same pressure. After some time the balloon will :

A
enlarged
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B
collapsed completely
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C
shrunk size
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D
remained unchanged in size
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Solution

The correct option is D remained unchanged in size
A balloon filled with ethylene (molecular formula C2H4) is pricked with a sharp point and quickly plunged into a tank of hydrogen at the same pressure. After some time the balloon will have remained unchanged in size. Since the pressure inside and outside balloon is same, there will be no change in the volume of the balloon. The number of moles of ethylene that escapes in a given time will be equal to the number of moles of hydrogen that enters the balloon at the same time.

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