1.

The halide which is inert to water is

Answer»

`F_(2)`
`Cl_(2)`
`Br_(2)`
`I_(2)`

Solution :Sometimes, when MAXIMUM covalency is obtained, the halides becomes INERT to water.Thus, (or similarly `CCI_4)` is stable. This is because `SF_6` is coordinately SATURATED and sterically hindered. Thus, `SF_6` is inert to water, because of kinetic RATHER than thermodynamic factors:
(a) `PCl_(5)+4H_(2)O to H_(3)PO_(4)+5H^(+)Cl^(-)`
(b) `SiCl_(4)+4H_2O to SI(OH)_(4)+4H^(+)Cl^(-)`
`(c) BCl_(3)+3H_(2)O to B(OH)_(3)+3H^(+)Cl^(-)`


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