1.

In the presence of an anthraquinone derivatives as a catalyst, the aqueous solution of sodium dithionite Na_(2)S_(2)O_(4) (Fieser's solution) effectively remove oxygen and forms

Answer»

`Na_(2)S_(2)O_(6)`
`Na_(2)S_(2)O_(5)`
`Na_(2)SO_(4)`
`Na_(2)S_(2)O_(8)`

Answer :A


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