Toy balloons that float in the air are usually filled with
Question and options
Toy balloons that float in the air are usually filled with
- Helium
- Oxygen
- Nitrogen
- Argon
Answer and explanation
Correct answer: A - Helium
Balloons that float are usually filled with helium, which is much lighter than air and, unlike hydrogen, does not burn. Oxygen and nitrogen are about as dense as air and argon is denser, so a balloon filled with any of them would not rise.
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