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Which has greater reactivity...

Which has greater reactivity

A

`TeCl_(6)`

B

`SF_(6)`

C

`TeF_(6)`

D

`SeF_(6)`

Text Solution

Verified by Experts

The correct Answer is:
C
`TeCl_6`, is unknown, because Te atom cannot accommodate six large Cl atoms around itself. `SF_6`, is extremely unreactive, because it is coordinately saturated and sterically hindered. `SeF_6`, is slightly more reactive, `TeF_6`, is hydrolysed by water. This is possibly due to larger size of Te, which permits the larger coordination number necessary in the first stage of hydrolysis
`TeF_(2) +6H_(2)O to 6HF +H_(6)TeO_(6)`
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