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A monoatomic gas reacts with fluorine to...

A monoatomic gas reacts with fluorine to form a fluoride which dissolve in HF to give a conducting solution. The fluoride is

A

`XeF_(2)`

B

`XeF_(4)`

C

`XeF_(6)`

D

`OF_(2)`.

Text Solution

Verified by Experts

The correct Answer is:
C
A monoatomic gas is a noble gas and out of all the noble gases the compounds of Xe or Kr (to some extent) are known. Xe reacts with F to give three types of fluorides `XeF_(2), XeF_(4), XeF_(6)`. However it is `XeF_(6)` which dissolves in HF to give conducting solution.
`underset((1 : 20))(Xe + 3F_(2)) underset(575 K) overset("Ni tube")rarr XeF_(6)`
`XeF_(6) + HF rarr underset("conducting due to ions")(XeF_(5)^(-) + HF_(2)^(-))`
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