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A yellow metallic powder is burnt in a s...

A yellow metallic powder is burnt in a stream of fluorine to obtain a colourless gas X which is thermally stable and chemically inert. Its molecule has octahedral geometry. Another colourless gas Y with same constituent atoms as that of X is obtained when sulphur dichloride is heated with sodium fluoride. Its molecule has trigonal pyramidal structure. X and Y are respectively

A

`SF_(4) and S_(2)F_(2)`

B

`SF_(6) and SF_(4)`

C

`NaF and NaC1`

D

`SF_(4) and SF_(6)`

Text Solution

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The correct Answer is:
B
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