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Question

The noble gases have closed-shell electronic configuration and are monoatomic gases used normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.

The direct reaction of xenon with fluorine leads to a series of compounds with oxidation number +2, +4 and +6. XeF4 reacts violently with water to give XeO3. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.

Argon is used in arc welding because of its

A
low reactivity with metal
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B
ability to lower the melting point of metal
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C
flammability
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D
high calorific value
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Solution

The correct option is A low reactivity with metal
Ar, being inert, provide inert atmosphere in arc welding, and prevent from undesired oxidation.

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