nitrogen
chlorine
oxygen
hydrogen
Answer is Right!
Answer is Wrong!
The correct answer is A. nitrogen.
Electric bulbs typically contain chemically inert gases such as nitrogen to prevent the filament from burning up. Nitrogen is a non-reactive gas that does not react with the filament, even at high temperatures. This helps to extend the life of the bulb.
Chlorine is a reactive gas that can react with the filament, causing it to burn up more quickly. Oxygen is also a reactive gas that can react with the filament, but it is less reactive than chlorine. Hydrogen is a flammable gas that can cause the bulb to explode.
Therefore, the best gas to use in an electric bulb is nitrogen. It is non-reactive, does not react with the filament, and does not cause the bulb to explode.