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Option 2 : Helium
The correct answer is Helium.
- Inert gas or noble gas is gas that does not generally participate in chemical reactions and is always available in a free state.
- All inert gases are colourless, odourless, and tasteless.
- There are 7 elements in class 18(inert gases) of the periodic table- Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson (Og).
- Helium is used in the treatment of Asthma, Balloons, welding, etc.
- Xenon is used in Photographic flashes, high-pressure lamps, NMR Spectroscopy.
- Neon is used in TV Tubes, Signboards, Laser, etc.
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