Question
Helium is used :
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Solution
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Helium is used for filing airships and balloons for meteorological observations.
Mixture of with under pressure is supplied to sea divers for respiration.
Helium is used to provide inert atmosphere in the welding of metals or alloys that are easily oxidized.
Helium is lighter than that of air and is used for inflating the tyres of big aeroplanes.
Liquid form of Helium is used in as refrigerant.
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