1.

The halide which is inert to water is :

Answer»

`PCl_(5)`
`SiCl_(4)`
`BCl_(3)`
`SF_(6)`

Solution :Sometimes, when MAXIMUM covalency is obtained, the halides become inert to WATER, thus `SF_(6)`(or similarly `C Cl_(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 factor.
A. `PCl_(5) +4H_(2)O to H_(3)PO_(4) +5HCl`
B. `SiCl_(4) +4H_(2)O to Si(OH)_(4) +4HCl`
C. `BCl_(3)+3H_(2)O to B(OH)_(3) +3HCl`


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