Question

Helium is preferred to hydrogen for filling
balloons because it is

a)Lighter than air
b)Non combustible

Answer 1

Answer:

a)Lighter than air

Explanation: The gases like hydrogen and helium are used in the balloons because they are lighter than the air. But helium is more preferable than hydrogen because helium is non-combustible and that's why it is more safe to use.

Answer 2

Answer:

The gases like hydrogen and helium are used in the balloons because they are lighter than the air. But helium is more preferable than hydrogen because helium is non-combustible and that's why it is more safe to use

Explanation:

Hydrogen is highly combustible and even the slightest of spark can set it on fire. Hence, helium is preferred over hydrogen for filling balloons.