Helium is used in balloons in place of hydrogen because it is

Options

(a) radioactive
(b) more abundant than hydrogen
(c) incombustible
(d) lighter than hydrogen

Correct Answer:

incombustible

Explanation:

Helium is used in balloons in place of hydrogen. Although lifting power of helium is about 92% of that of hydrogen, yet it is preferred because it is non-flammable or incombustible.