1.

Which is a reversible reaction:

Answer»

`H_2+I_2rarr2HI`
`H_2SO_4 + BA(OH)_2 RARR BaSO_4 + 2H_2O`
`Nacl+AgNO_3 rarr NaNO_3 + Agcldownarrow`
`2KClO_3rarr2KCl +3O_2downarrow`

ANSWER :A


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