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प्रश्न
Give the uses of helium.
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उत्तर
- Helium and oxygen mixture is used by divers in place of air oxygen mixture. This prevents the painful dangerous condition called bends.
- Helium is used to provide an inert atmosphere in the electric arc welding of metals
- Helium has the lowest boiling point hence used in cryogenics (low-temperature science).
- It is much less denser than air and hence used for filling air balloons.
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संबंधित प्रश्न
Assertion: bond dissociation energy of fluorine is greater than chlorine gas
Reason: chlorine has more electronic repulsion than fluorine
The correct order of the thermal stability of hydrogen halide is ____________.
XeF6 on complete hydrolysis produces ____________.
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
Among the following the correct order of acidity is:
Give the oxidation state of halogen in the following.
I2O4
What are interhalogen compounds? Give examples.
What is the hybridisation of iodine in IF7? Give its structure.
Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.
Deduce the oxidation number of oxygen in hypofluorous acid – HOF.
