Question

Helium is used in gas balloons instead of hydrogen because -

• A. It is lighter than $H_2$
• B. It is non-combustible
• C. It is more abundant than $H_2$
• D. Its leakage can be detected easily

Answer 1

The correct option is B It is non-combustible

Helium is used in gas balloons instead of hydrogen because it is a non combustible gas. 'He' doesn't catch fire like hydrogen because He is an inert gas.
Therefore, correct option is (b).