Which species is being oxidized, and which species is being reduced? 1. H2 is oxidized and O is reduced

2. H2 is reduced and O is oxidized

3. H+ is reduced and O-2 is oxidized

4. H+ is oxidized and O-2​ is reduced

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)