1.

The order of reactivity of halogens with Hydrogen is

Answer»

`F_(2)ltCl_(2)ltBr_(2)ltI_(2)`
`F_(2)gtCl_(2)gtBr_(2)gtI_(2)`
`F_(2)ltBr_(2)ltCl_(2)ltI_(2)`
`F_(2)gtI_(2)gtBr_(2)gtCl_(2)`

Answer :B


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