Which one among the following statements for the gases mentioned below is not correct?

Statement 2 is incorrect because Helium is not the commonly used gas in electric bulbs. Instead, inactive gases such as Argon and Nitrogen are primarily used to fill incandescent bulbs to prevent the tungsten filament from oxidizing or burning. Statement 1 is correct as Hydrogen has three naturally occurring isotopes: Protium, Deuterium, and Tritium. Statement 3 is correct because liquid oxygen is a standard oxidizer used to burn fuel in rocket engines for spacecraft propulsion. Statement 4 is correct as Nitrogen is a relatively inert gas used in food packaging (Modified Atmosphere Packaging) to replace air, which prevents the oxidation of fats and oils (rancidity) in products like chips. Therefore, the false statement regarding the mentioned gases is the use of Helium in electric bulbs.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Nitrogen > p. 272