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A yellow coloured crystalline substance ...

A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is thermally stable and has octahedral geometry. `X` can be

A

`SF_4`

B

`S_2 F_2`

C

`SF_6`

D

`S_2 F_6`

Text Solution

Verified by Experts

The correct Answer is:
C
`underset("Crystalline substance") ("Yellow coloured") + underset("a colourless gas, thermally stable octahedral geometry")(F_(2) rarr X`
Yellow coloured crystalline substance is sulphur
`S_(8) + 24 F_(2) rarr 8 S F_(6)`
`X` is `SF_(6)` since it is octahedral, thermally stable.
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