Why does an inflated balloon tend to expand and possibly burst if it is placed in a vacuum chamber, even if it was not over-inflated initially?

7 views 1 helpful Updated Jul 27, 2026
Appears in Class 8th
Solution ✔ Verified
  • AThe rubber becomes brittle in a vacuum.
  • BThe air inside the balloon cools down significantly.
  • CThe absence of external atmospheric pressure allows the internal pressure to expand the balloon unchecked.
  • DThe gases inside the balloon react with the vacuum.
Explanation

The balloon expands and may burst because in a vacuum chamber, there is almost no external atmospheric pressure pushing inwards on the balloon. The air pressure inside the balloon, which was initially balanced by the external atmospheric pressure, can then expand the balloon's rubber until it reaches its elastic limit and bursts.

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