State the uses of noble gases.

Explanation

Helium : Helium is a non-inflammable and light gas and hence, it is used in filling balloons for meteorological observations.
It is used in gas-cooled nuclear reactors.
Liquid helium (b.p. 4.2 K) finds use as cryogenic agent for carrying out various experiments at low temperatures.
It is used to produce and sustain powerful superconducting magnets which form essential part of modern NMR spectrometers and Magnetic Resonance Imaging (MRI) systems for clinical diagnosis.
It is used as a diluent for oxygen in modern diving apparatus because of its very low solubility in blood.
Neon : It is used in discharge tubes and fluorescent bulbs for advertisement display purposes. Neon bulbs are used in botanical gardens and in green houses.
Argon : Argon is used mainly to provide an inert atmosphere in high temperature metallurgical processes (arc welding of metals or alloys) and for filling electric bulbs.
It is also used in the laboratory for handling substances that are air-sensitive.
Xenon and Krypton : They are used in light bulbs designed for special purposes.