1.

The halogen which gives O_2 with hot conc. NaOH is

Answer»

`I_2`
`Br_2`
`Cl_2`
`F_2`

SOLUTION :Only `F_2` GIVES `O_2` with HOT CONC. NAOH
`4NaOH + 2F_2 to 2NaF + 2H_2O + O_2`


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