Identify the use of mixture of $\mathrm{Ar}$ and $\mathrm{N}_2$ from following.
Identify the use of mixture of $\mathrm{Ar}$ and $\mathrm{N}_2$ from following.
For magnetic resonance imaging
For production of lasers
To fill in electric bulbs
To produce low temperature for research work
Solution
The filament in an electric bulb is made using tungsten which would burn quickly when it comes in contact with the oxygen in the air. This is the reason why unreactive gases such as argon and nitrogen are used for filling an electric bulb. These gases are chemically inactive.
Hence, bulbs are filled with chemically inactive Nitrogen or Argon gas in order to prevent the oxidation of tungsten filament used in the bulb.