Question

If a helium balloon is placed in a cold freezer, what happens in the balloon?

Answer 1

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Here is your answer

When a helium balloon is placed in the freezer then because of the low temperature it may become as a solid

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Answer 2

What would happen if you put a balloon in the freezer? ... As the air cools it compresses and therefore exerts less pressure on the balloon. If cold enough your balloon will be visibly deflated. If you then bring back to room temperature it will return to normal.