Why balloon swells after filling gas in it?

Dear Student

It is ​​​​​​because of the force of molecules of air filled in the balloon on the walls of balloon and due to this the pressure inside the balloon is higher than the external pressure after filling the gas.
That's why balloon swells after filling gas in it.

Regards

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DONT KNOW
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Beacuse of the molecolular force in air that pushes it from inside and hence the swelling of balloon takes place .

Give a like it this is correcr
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Bc air applies pressure on its walls as it wants to move out
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