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JEE Main levelSingle correct optionDifficulty 2 of 3ph215

Which set of conditions is used to obtain mainly $XeF X_{6}$ from xenon and fluorine?

AXe : $F X_{2}$ = 1 : 5, about $873 K$ , 7 bar
BXe in excess, about $673 K$ , nickel vessel
CXe : $F X_{2}$ = 1 : 20, about $573 K$ , 60-70 bar
DXe : $F X_{2}$ = 1 : 1, room temperature, 1 bar

Answer: C

A large excess of

F X_{2}

(about 20 mol per mol Xe) at about

573 K

and 60-70 bar gives

XeF X_{6}

. A 1:5 ratio at 873 K and 7 bar gives

XeF X_{4}

. Excess xenon (Xe :

F X_{2}

= 2 : 1) in a nickel tube at about 673 K gives

XeF X_{2}

.

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