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- 1. Multiple ChoiceManganese (Mn) exhibits a larger number ofoxidation numbers in its compounds than anyother Period 4 transitionmetal. The most important oxidation numbers of manganese are illustrated by the oxides MnO, MnO2, and Mn2O7. What oxidation numbers of manganese are illustrated here, respectively?−2, −4, and −7+2, +3, and +9+2; +4, and +7−2, −3, and −9
- 2. Multiple ChoiceWhat is the oxidation state of nitrogen in the molecule N2?0123
- 3. Multiple ChoiceThe oxidation numbers exhibited by iron in the red-brown oxide Fe2O3 (iron rust), the greenish-black oxide FeO (unstable and almost impossible to get pure) and the very unstable reddish-purple ferrate ion FeO42- are+3, +2, and +6, respectively.−3, −2, and −6, respectively.+2, +1, and +4, respectively.−2, −1, and −4, respectively.
- 4. Multiple ChoiceIf the oxidation state of O is −2, is Mn reduced or oxidized when it goes from MnO4− to MnO2?reducedoxidizedno changeboth oxidized and reduced
- 5. Multiple ChoiceDoes the following equation represent a redox reaction? What is the oxidation state of nitrogen in KNO3?
2KNO3(s) → 2KNO2(s) + O2(g)Yes
-3Yes
+5No
-3No
+5 - 6. Multiple ChoiceDoes the following equation represent a redox reaction? What is the oxidation state of chlorine in HCl?
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(ℓ)Yes
-1Yes
-3No
-1No
-3 - 7. Multiple ChoiceDoes the following equation represent a redox reaction? What is the oxidation state of magnesium in MgCl2?
Mg(s) + ZnCl2(aq) → Zn(s) +MgCl2(aq)Yes
+1Yes
+2No
+1No
+2 - 8. Multiple ChoiceDoes the following equation represent a redox reaction? What is the oxidation state of nitrogen in NH4Cl?
2NH4Cl(aq) + Ca(OH)2(aq) → 2NH3(aq) + 2H2O(ℓ) + CaCl2(aq)Yes
-4Yes
-3No
-4No
-3 - Answer choicesTagsAnswer choicesTags