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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