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Coal Gas

A rubber ball...

Question

A rubber balloon filled with hydrogen gas is left free in air. Then, the balloon

A

ascends upto a certain height and explodes

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B

Escapes into space.

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C

ascends upto a certain height and then descends back to ground

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D

ascends upto a certain height in air and floats

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Solution

The correct option is D
ascends upto a certain height in air and floats

A rubber balloon filled with hydrogen gas is lighter than air; hence, if it is left free in air then the balloon ascends upto a certain height in air and floats.

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