Question

13. Hydrogen and helium have both been used to fill balloons. Which property of helium

makes it the preferred choice to hydrogen?​

Answer 1

Helium is lighter than Hydrogen and Helium is a much safer gas.

Answer 2

Helium gas is known to be very light which makes it a preferred choice to hydrogen. Helium has low boiling point, low density, low solubility, high thermal conductivity and inertness. Since it is less dense, it is considered suitable for filling balloons.