Helium is used to fill weather balloons rather than hydrogen. What is the main reason for this?

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Question

Helium is used to fill weather balloons rather than hydrogen. What is the main reason for this?

Accepted Answer

B) Helium is less flammable than hydrogen — Hydrogen is flammable and can form explosive mixtures with air, making it a safety hazard in balloons. Helium is chemically inert and non-flammable, so it is far safer to use despite being slightly denser than hydrogen.

Answer

C) Helium has a higher boiling point than hydrogen

Answer

D) Helium is cheaper to produce than hydrogen

Answer

A) Helium is denser than hydrogen

Answer

B) Helium is less flammable than hydrogen

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