A hydrogen balloon rises in air because :

Density of hydrogen > density of air.

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Density of hydrogen = density of air.

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Density of hydrogen < density of air.

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None of the above

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Solution

The correct option is C
Density of hydrogen < density of air.

Hydrogen balloon rises in air because of the density of hydrogen < density of air.

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A balloon filled with hydrogen rises in the air. Explain the reason.

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