Question : Which of the following is an inert gas?
Option 1: Hydrogen
Option 2: Nitrogen
Option 3: Oxygen
Option 4: Argon
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Correct Answer: Argon
Solution : The correct option is Argon .
Argon is a noble gas with the atomic number 18 and the chemical symbol Ar. It is colourless, odourless and tasteless, accounting for approximately 0.93% of the Earth's atmosphere. Because of its inert qualities and non-reactive nature, Argon (Ar) is used in welding, light bulbs, laboratory, artefact preservation, medical treatments, energy-efficient windows, gas lasers, and deep-sea diving. Other noble gases in Group 18 (VIII-A) of the periodic table include the elements He (Helium), Neon (Ne), krypton (Kr), Radon (Rn), and Xenon (Xe).
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