1.

The decreasing leaving group order of the following is: i. F^(o-), ii. Cl^(o-), iii. Br^(o-), Iv. I^(o-)

Answer»

`(i) GT (II) gt (iii) gt (IV)`
`(iv) gt (iii) gt (ii) gt (i)`
`(ii) gt (i) gt (iii) gt (iv)`
`(ii) gt (i) gt (iv) gt (iii)`

Solution :Weaker the base or stronger the ACID, stronger is the leaving GROUP.
`I^(o-) gt Br^(o-) gt Cl^(o-) gt F^(o-)`


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