4. Take an empty juice bottle. Cover the top of the bottle with a balloon. Keep the bottle in the basin with hot water. It is observed that
a.Balloon decreases its size as air expands on cooling
b.Balloon increases its size as air expands on heating
c.Balloon gets deflated as air expands on heating
d.None of the above
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balloon size will increases
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the ans is B because balloon increases its size
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