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- 1. Multiple ChoiceOxygen always has an oxidation number of...-112-2
- 2. Multiple ChoiceIs calcium oxidized or reduced in the following reaction?
2CaO--> 2Ca + O2OxidizedReduced - 3. Multiple ChoiceIn the reaction
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________ReducedSynthesizedOxidizedNone of the above - 4. Multiple ChoiceIn the reaction Zn + H2O --> ZnO2 + H2
which element, if any, is oxidized?ZincHydrogenOxygenNone - 5. Multiple ChoiceIf in a reaction, copper is reduced; its number of electrons has:IncreasedDecreasedRemained ConstantVaries Randomly
- 6. Multiple ChoiceIf an atom loses electrons during a chemical reaction, the atom was:OxidizedReducedNeutralizedPrecipitated
- 7. Multiple Choice
A redox reaction is NOT:
all reactions
a combustion reaction
a reduction-oxidation reaction
a reaction in which electrons are transferred from one atom to another
- 8. Multiple Choice
Combustion and single-replacement reactions are __________ redox reactions.
always
never
sometimes
mostly
- 9. Multiple Choice
Defined as the loss of electrons.
oxidation
reduction
redox
OIL RIG
- 10. Multiple Choice
These keep track of the movement of electrons.
(+) and (-) signs
oxidation numbers
coefficients
subscripts
- Answer choicesTagsAnswer choicesTags