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    Chemistry
    Grade-9
    Easy

    Question

    Why do the balloons filled with helium move up to the sky?

    1. They float due to the helium's inert properties.
    2. Fluorine-based rubber in the balloon reacts with helium to produce the buoyancy.
    3. The helium gas floats because its weight is too low.
    4. All of the above

    Hint:

    Helium is lighter than air.

    The correct answer is: The helium gas floats because its weight is too low.

      • Helium is called 'lighter than air gas' as it is less denser than air.
      • When balloons are filled with helium gas it rises because of a force buoyancy.
      • Hence, the balloons filled with helium move up to the sky.

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