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19 Cards in this Set
- Front
- Back
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In this reaction, what is the substance oxidized?
Zn + 2 HCl → ZnCl2 + H2 |
D) zinc
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In the following reaction, oxidation occurs on which type of atom?
3Mg + N2 → Mg3 N2 |
A) magnesium
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In the following reaction, what substance is reduced?
2Fe2O3 + 3C → CO2 + 4Fe |
B) iron in the iron(III) oxide
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When zinc metal is oxidized, how many electrons does one atom of zinc give up?
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B) 2
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In the sulfite ion, SO32-, what is the oxidation number of sulfur?
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D) 4+
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What is the oxidation number of hydrogen in H2?
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A) 0
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In the ammonium ion, NH4+, what is the oxidation number of hydrogen?
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A) 1+
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In chromate ion, CrO42-, the oxidation number of chromium is ________.
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C) 6+
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In nitrate ion, NO3-, the oxidation number of nitrogen is ________.
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C) 5+
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In the ammonium ion, NH4+, what is the oxidation number of nitrogen?
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E) 3-
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A substance is oxidized when it loses electrons.
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TRUE
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A substance is reduced if it gains electrons
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TRUE
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When manganese metal forms manganese ion, Mn2+, it is reduced.
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FALSE
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When oxygen is in its elemental form, O2, it has an oxidation number of 0.
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TRUE
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When carbon monoxide is converted to carbon dioxide, the carbon is oxidized.
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TRUE
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When hydrogen and oxygen are converted to water, the hydrogen is reduced.
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FALSE
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When lead oxide, PbO, is converted to lead metal, the lead is reduced.
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TRUE
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In the compound Fe2O3, the oxygen has an oxidation number of -2.
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TRUE
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Is the combustion of carbon an example of an oxidation or a reduction reaction?
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oxidation
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