08. REDOX REACTIONS
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Redox Reactions

18674 When \(F{e^{2 + }}\) changes to \(F{e^{3 + }}\) in a reaction

1 It loses an electron
2 It gains an electron
3 It loses a proton
4 It gains a proton
Redox Reactions

18675 In acid solution, the reaction \(MnO_4^ - \, \to \,M{n^{2 + }}\) involves

1 Oxidation by \(3\) electrons
2 Reduction by \( 3 \) electrons
3 Oxidation by \(5 \) electrons
4 Reduction by \(5\)  electrons
Redox Reactions

18676 When \(Cu\) or \(Zn\) added to \(CuSO_4\) we get \(Cu\) .It is due to

1 Oxidation of \(C{u^{ + 2}}\)
2 Reduction of \(C{u^{ + 2}}\)
3 Hydrolysis of \(CuS{O_4}\)
4 Ionization of \(CuS{O_4}\)
Redox Reactions

18677 In the reaction, \(4Fe + 3{O_2} \to 4F{e^{3 + }} + 6{O^{2 - }}\) which of the following statement is incorrect

1 A Redox reaction
2 Metallic iron is a reducing agent
3 \(F{e^{3 + }}\)is an oxidising agent
4 Metallic iron is reduced to \(F{e^{3 + }}\)
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Redox Reactions

18674 When \(F{e^{2 + }}\) changes to \(F{e^{3 + }}\) in a reaction

1 It loses an electron
2 It gains an electron
3 It loses a proton
4 It gains a proton
Redox Reactions

18675 In acid solution, the reaction \(MnO_4^ - \, \to \,M{n^{2 + }}\) involves

1 Oxidation by \(3\) electrons
2 Reduction by \( 3 \) electrons
3 Oxidation by \(5 \) electrons
4 Reduction by \(5\)  electrons
Redox Reactions

18676 When \(Cu\) or \(Zn\) added to \(CuSO_4\) we get \(Cu\) .It is due to

1 Oxidation of \(C{u^{ + 2}}\)
2 Reduction of \(C{u^{ + 2}}\)
3 Hydrolysis of \(CuS{O_4}\)
4 Ionization of \(CuS{O_4}\)
Redox Reactions

18677 In the reaction, \(4Fe + 3{O_2} \to 4F{e^{3 + }} + 6{O^{2 - }}\) which of the following statement is incorrect

1 A Redox reaction
2 Metallic iron is a reducing agent
3 \(F{e^{3 + }}\)is an oxidising agent
4 Metallic iron is reduced to \(F{e^{3 + }}\)
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Redox Reactions

18674 When \(F{e^{2 + }}\) changes to \(F{e^{3 + }}\) in a reaction

1 It loses an electron
2 It gains an electron
3 It loses a proton
4 It gains a proton
Redox Reactions

18675 In acid solution, the reaction \(MnO_4^ - \, \to \,M{n^{2 + }}\) involves

1 Oxidation by \(3\) electrons
2 Reduction by \( 3 \) electrons
3 Oxidation by \(5 \) electrons
4 Reduction by \(5\)  electrons
Redox Reactions

18676 When \(Cu\) or \(Zn\) added to \(CuSO_4\) we get \(Cu\) .It is due to

1 Oxidation of \(C{u^{ + 2}}\)
2 Reduction of \(C{u^{ + 2}}\)
3 Hydrolysis of \(CuS{O_4}\)
4 Ionization of \(CuS{O_4}\)
Redox Reactions

18677 In the reaction, \(4Fe + 3{O_2} \to 4F{e^{3 + }} + 6{O^{2 - }}\) which of the following statement is incorrect

1 A Redox reaction
2 Metallic iron is a reducing agent
3 \(F{e^{3 + }}\)is an oxidising agent
4 Metallic iron is reduced to \(F{e^{3 + }}\)
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Redox Reactions

18674 When \(F{e^{2 + }}\) changes to \(F{e^{3 + }}\) in a reaction

1 It loses an electron
2 It gains an electron
3 It loses a proton
4 It gains a proton
Redox Reactions

18675 In acid solution, the reaction \(MnO_4^ - \, \to \,M{n^{2 + }}\) involves

1 Oxidation by \(3\) electrons
2 Reduction by \( 3 \) electrons
3 Oxidation by \(5 \) electrons
4 Reduction by \(5\)  electrons
Redox Reactions

18676 When \(Cu\) or \(Zn\) added to \(CuSO_4\) we get \(Cu\) .It is due to

1 Oxidation of \(C{u^{ + 2}}\)
2 Reduction of \(C{u^{ + 2}}\)
3 Hydrolysis of \(CuS{O_4}\)
4 Ionization of \(CuS{O_4}\)
Redox Reactions

18677 In the reaction, \(4Fe + 3{O_2} \to 4F{e^{3 + }} + 6{O^{2 - }}\) which of the following statement is incorrect

1 A Redox reaction
2 Metallic iron is a reducing agent
3 \(F{e^{3 + }}\)is an oxidising agent
4 Metallic iron is reduced to \(F{e^{3 + }}\)
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