1.

Pick out incorrect statement for H_2SO_3

Answer»

But-1-ene when HYDRATED in presence of conc. `H_2SO_4`, form butan-2-ol
Carbon or sulphur are oxidized by conc. `H_2SO_4` to their respective dioxides.
Cu is oxidized by conc. `H_2SO_4` to form only `H_2S`
Zn REDUCED conc. `H_2SO_4` to form `SO_2, and ZNSO_4`

Solution :`SO_2` is main reduction product with less electropositive metal having HIGH electrode potential.
`Cu+2H_(2)SO_(4) to CuSO_(4)+2H_(2)O+2SO_(2)`
(a). `CH_(3)-CH_(2)-CH=CH_(2)+H_(2)SO_(4) to CH_(3)-CH_(2) underset(OSO_(3)H)underset(|)(CH)-CH_(3) overset(H_(2)O)to CH_(3)-CH_(2)-underset(OH)underset(|)(CH)-CH_(3)+H_(2)SO_(4)`
(b). `C+underset(("Conc.""))(2H_(2)SO_(4))to 2H_(2)O+CO_(2)+2SO_(2)`
`(b) S+2H_(2)SO_(4) to 2H_(2)O+3SO_(2)`
`(d) underset(("98% )acid")) (Zn+H_(2)SO_(4)) to ZnSO_(4)+2H_(2)O+SO_(4)`


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