Multiple choice

Trisha's father bought her a gas balloon, but as her grip loosened, the balloon flew away. Which of the following gases was used in the balloon?

  1. Oxygen

  2. Carbon dioxide

  3. Helium

  4. Liquefied petroleum gas

  5. Carbon monooxide

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. As helium is lighter than air, it is used in balloons.