Air is a homogeneous mixture of gases which also contains argon and nitrogen which are used for filling electric bulbs. But air is not filled in electric bulbs because

Options

A. the active component of air oxidises the filament.
B. the boiling point of air is greater than that of argon or nitrogen.
C. air has impurities like dust particles.
D. air exerts more pressure.

Answer

A

Explanation

Since air consists of an active component that is oxygen, it oxidises tungsten filament or any other metal used as a filament. Hence, electric bulbs are filled with inert gas like argon or chemically inert nitrogen.