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- 1. Multiple Choice
What element is being Oxidized?NHOS - 2. Multiple ChoiceWhat element is being Reduced?NHOS
- 3. Multiple ChoiceWhat are the coefficients when the equation is balanced?2 + 3 --> 2 + 3 + 41 + 3 --> 1 + 3 + 22 + 4 --> 2 + 3 + 21 + 1 --> 1 + 1 + 1
- 4. Multiple ChoiceWhat element is being Oxidized?IHSO
- 5. Multiple ChoiceWhat are the coefficients when the equation is balanced?1 + 1 + 1 --> 2 + 1 + 32 + 2 + 2 --> 4 + 2 + 31 + 2 + 1 --> 2 + 2 + 31 + 1 + 1 --> 1 + 1 + 1
- 6. Multiple ChoiceWhat element is being reduced?IH
HS
SO
O - 7. Multiple ChoiceWhat is oxidation number of H in H2O?0-2-1+1
- 8. Multiple ChoiceWhat is oxidation number of Cr in Cr2O72-?-2+2+6+12
- 9. Multiple ChoiceWhat is oxidation number of H in CaH2?+1-10+2
- 10. Multiple ChoiceWhat is oxidation number of Fe in FeO ?+2-20+1
- 11. Multiple ChoiceWhat is oxidation number of O in O2 ?0-2+1+2
- 12. Multiple ChoiceWhat is the oxidation number of N in NO2-1?-3+4-2+3
- 13. Multiple ChoiceIf in a reaction, copper is reduced; its number of electrons has:IncreasedDecreasedRemained ConstantVaries Randomly
- 14. Multiple ChoiceIf an atom loses electrons during a chemical reaction, the atom was:OxidizedReducedNeutralizedPrecipitated
- 15. Multiple ChoiceIn the reaction
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________ReducedSynthesizedOxidizedNone of the above - 16. Multiple ChoiceIn the reaction Zn + H2O --> ZnO2 + H2
which element, if any, is oxidized?ZincHydrogenOxygenNone - 17. Multiple ChoiceAnother name for a "oxidation-reduction" reaction ischemical reactionneutralization reactionredox reactionnuclear reaction
- 18. Multiple ChoiceWhat substance is oxidized in the following reaction?
4Fe + 3O2 --> 2Fe2O3IronFluorineOxygen - 19. Multiple ChoiceIs calcium oxidized or reduced in the following reaction?
2CaO--> 2Ca + O2OxidizedReduced - 20. Multiple ChoiceOxygen always has an oxidation number of...-112-2
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