08. REDOX REACTIONS
Redox Reactions

18658 Oxidation involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of negative part
4 Decrease in the valency of positive part
Redox Reactions

18659 Incorrect statement regarding rusting is

1 Metallic iron is oxidised to \(F{e^{3 + }}\)ions
2 Metallic iron is reduced to \(F{e^{2 - }}\) ions
3 Oxygen gas is reduced to oxide ion
4 Yellowish -brown product is formed
Redox Reactions

18660 When copper turnings are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because, copper

1 Displaces silver from the solution
2 Forms a blue coloured complex with \(AgN{O_3}\)
3 Is oxidised to \(C{u^{2 + }}\)
4 Is reduced to \(C{u^{2 + }}\)
Redox Reactions

18661 Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in the solution

1 Sodium atoms
2 Solvated electrons
3 Sodium hydride
4 Sodium amide
Redox Reactions

18658 Oxidation involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of negative part
4 Decrease in the valency of positive part
Redox Reactions

18659 Incorrect statement regarding rusting is

1 Metallic iron is oxidised to \(F{e^{3 + }}\)ions
2 Metallic iron is reduced to \(F{e^{2 - }}\) ions
3 Oxygen gas is reduced to oxide ion
4 Yellowish -brown product is formed
Redox Reactions

18660 When copper turnings are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because, copper

1 Displaces silver from the solution
2 Forms a blue coloured complex with \(AgN{O_3}\)
3 Is oxidised to \(C{u^{2 + }}\)
4 Is reduced to \(C{u^{2 + }}\)
Redox Reactions

18661 Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in the solution

1 Sodium atoms
2 Solvated electrons
3 Sodium hydride
4 Sodium amide
Redox Reactions

18658 Oxidation involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of negative part
4 Decrease in the valency of positive part
Redox Reactions

18659 Incorrect statement regarding rusting is

1 Metallic iron is oxidised to \(F{e^{3 + }}\)ions
2 Metallic iron is reduced to \(F{e^{2 - }}\) ions
3 Oxygen gas is reduced to oxide ion
4 Yellowish -brown product is formed
Redox Reactions

18660 When copper turnings are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because, copper

1 Displaces silver from the solution
2 Forms a blue coloured complex with \(AgN{O_3}\)
3 Is oxidised to \(C{u^{2 + }}\)
4 Is reduced to \(C{u^{2 + }}\)
Redox Reactions

18661 Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in the solution

1 Sodium atoms
2 Solvated electrons
3 Sodium hydride
4 Sodium amide
Redox Reactions

18658 Oxidation involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of negative part
4 Decrease in the valency of positive part
Redox Reactions

18659 Incorrect statement regarding rusting is

1 Metallic iron is oxidised to \(F{e^{3 + }}\)ions
2 Metallic iron is reduced to \(F{e^{2 - }}\) ions
3 Oxygen gas is reduced to oxide ion
4 Yellowish -brown product is formed
Redox Reactions

18660 When copper turnings are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because, copper

1 Displaces silver from the solution
2 Forms a blue coloured complex with \(AgN{O_3}\)
3 Is oxidised to \(C{u^{2 + }}\)
4 Is reduced to \(C{u^{2 + }}\)
Redox Reactions

18661 Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in the solution

1 Sodium atoms
2 Solvated electrons
3 Sodium hydride
4 Sodium amide