Table 7.14 : Uses of helium, neon and argonElement Uses
Helium i. Mixture of He and O 2 is used for artificial breathing of asthma patients.
ii. Mixture of He and O 2 is used for respiration by sea divers.
iii. For filling balloons, a mixture of helium (85%) and hydrogen (15 %) is
used.
iv. Helium is used for producing inert atmosphere required for welding
purpose and metallury of some metals.
v. Liquid helium is used for producing low temperature required for research.
vi. In low temperature gas thermometry, for production of lasers.
vii. Used to pressurise fuel tanks of liquid fueled rockets.
viii. Used as shielding gas for arc welding.
ix. In supersonic wind tunnels.
x. Helium nucleus is used as a bombarding particle for disintegration of
atoms.
xi. Used for magnetic resonance imaging.
Neon i. In Neon discharge lamps and signs. These signs are visible from the long
distances and also in mist or fog.
ii. Mixture of Ne and He is used in certain protective electrical devices such
as voltage stabilizers and current rectifiers.
iii. For production of lasers.
iv. In fluorescent tubes.
Argon i. For producing inert atmosphere in welding and steel production.
ii. Mixture of 85 % Ar and 15 % N 2 is filled in electric bulb to increase life
of filament.
iii. In filling fluorescent tubes and radio valves.
iv. It is mixed with neon to get lights of various colors.a. Preparation
i. Partial hydrolysis of Xenon fluorides
yields different oxyfluorides.
XeF 4 + H 2 O^80 0 C XeOF 2 + 2HF
XeF 6 + H 2 O XeOF 4 + 2HF
ii. Reaction of Xenon oxyfluoride with SiO 2
or hydrolysis yields xenon dioxydifluoride.
2XeOF 4 + SiO 2 2XeO 2 F 2 + SiF 4
XeOF 4 + H 2 O XeO 2 F 2 + 2HF
Use your brain powerWhat are the missing entries?
Formula Name
XeOF 2 Xenon mono
oxyfluoride
Xenon dioxydifluoride
XeO 3 F 2
XeO 2 F 4