Electrochemical Series and Applications
CHXII03:ELECTROCHEMISTRY

330099 Red hot carbon will remove oxygen from the oxides AO and BO but not from MO , while B will remove oxygen from AO. The activity of metals \(\mathrm{A}, \mathrm{B}\) and M in decreasing order is

1 A \(>\) B \(>\) M
2 B \(>\) A \(>\) M
3 \(\mathrm{M}>\mathrm{B}>\mathrm{A}\)
4 \(\mathrm{M}>\) A \(>\) B
CHXII03:ELECTROCHEMISTRY

330100 Consider the following standard electrode potentials \({\rm{(}}{{\rm{E}}^{\rm{o}}}\,\,{\rm{in}}\,\,{\rm{volts)}}\) in aqueous solution :
\({\rm{Element}}\,\,\,\,{{\rm{M}}^{{\rm{3 + }}}}{\rm{/M}}\,\,\,{{\rm{M}}^{\rm{ + }}}{\rm{/M}}\)
\(\,\,\,\,{\rm{Al}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}{\rm{.66}}\,\,\,\,\,\,\,\,\,{\rm{ + 0}}{\rm{.55}}\)
\(\,\,\,\,{\rm{Tl}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 1}}{\rm{.26}}\,\,\,\,\,\,\,\,\,{\rm{ - 0}}{\rm{.34}}\)
Based on these data, which of the following statements is correct ?

1 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
2 \({\rm{A}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
3 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
4 \({\rm{T}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
CHXII03:ELECTROCHEMISTRY

330101 Out of Cu, Ag, Fe and Zn, the metal which can displace all others from their salt solutions is

1 Ag
2 Cu
3 Zn
4 Fe
CHXII03:ELECTROCHEMISTRY

330102 The position of some metals in the electrochemical series in decreasing electropositive character is given as Mg > Al > Zn > Cu > Ag. What will happen if a copper spoon is used to stir a solution of aluminium nitrate?

1 The solution becomes blue
2 There is no reaction
3 The spoon will get coated with aluminium
4 An alloy of aluminium and copper is formed
CHXII03:ELECTROCHEMISTRY

330099 Red hot carbon will remove oxygen from the oxides AO and BO but not from MO , while B will remove oxygen from AO. The activity of metals \(\mathrm{A}, \mathrm{B}\) and M in decreasing order is

1 A \(>\) B \(>\) M
2 B \(>\) A \(>\) M
3 \(\mathrm{M}>\mathrm{B}>\mathrm{A}\)
4 \(\mathrm{M}>\) A \(>\) B
CHXII03:ELECTROCHEMISTRY

330100 Consider the following standard electrode potentials \({\rm{(}}{{\rm{E}}^{\rm{o}}}\,\,{\rm{in}}\,\,{\rm{volts)}}\) in aqueous solution :
\({\rm{Element}}\,\,\,\,{{\rm{M}}^{{\rm{3 + }}}}{\rm{/M}}\,\,\,{{\rm{M}}^{\rm{ + }}}{\rm{/M}}\)
\(\,\,\,\,{\rm{Al}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}{\rm{.66}}\,\,\,\,\,\,\,\,\,{\rm{ + 0}}{\rm{.55}}\)
\(\,\,\,\,{\rm{Tl}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 1}}{\rm{.26}}\,\,\,\,\,\,\,\,\,{\rm{ - 0}}{\rm{.34}}\)
Based on these data, which of the following statements is correct ?

1 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
2 \({\rm{A}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
3 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
4 \({\rm{T}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
CHXII03:ELECTROCHEMISTRY

330101 Out of Cu, Ag, Fe and Zn, the metal which can displace all others from their salt solutions is

1 Ag
2 Cu
3 Zn
4 Fe
CHXII03:ELECTROCHEMISTRY

330102 The position of some metals in the electrochemical series in decreasing electropositive character is given as Mg > Al > Zn > Cu > Ag. What will happen if a copper spoon is used to stir a solution of aluminium nitrate?

1 The solution becomes blue
2 There is no reaction
3 The spoon will get coated with aluminium
4 An alloy of aluminium and copper is formed
CHXII03:ELECTROCHEMISTRY

330099 Red hot carbon will remove oxygen from the oxides AO and BO but not from MO , while B will remove oxygen from AO. The activity of metals \(\mathrm{A}, \mathrm{B}\) and M in decreasing order is

1 A \(>\) B \(>\) M
2 B \(>\) A \(>\) M
3 \(\mathrm{M}>\mathrm{B}>\mathrm{A}\)
4 \(\mathrm{M}>\) A \(>\) B
CHXII03:ELECTROCHEMISTRY

330100 Consider the following standard electrode potentials \({\rm{(}}{{\rm{E}}^{\rm{o}}}\,\,{\rm{in}}\,\,{\rm{volts)}}\) in aqueous solution :
\({\rm{Element}}\,\,\,\,{{\rm{M}}^{{\rm{3 + }}}}{\rm{/M}}\,\,\,{{\rm{M}}^{\rm{ + }}}{\rm{/M}}\)
\(\,\,\,\,{\rm{Al}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}{\rm{.66}}\,\,\,\,\,\,\,\,\,{\rm{ + 0}}{\rm{.55}}\)
\(\,\,\,\,{\rm{Tl}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 1}}{\rm{.26}}\,\,\,\,\,\,\,\,\,{\rm{ - 0}}{\rm{.34}}\)
Based on these data, which of the following statements is correct ?

1 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
2 \({\rm{A}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
3 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
4 \({\rm{T}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
CHXII03:ELECTROCHEMISTRY

330101 Out of Cu, Ag, Fe and Zn, the metal which can displace all others from their salt solutions is

1 Ag
2 Cu
3 Zn
4 Fe
CHXII03:ELECTROCHEMISTRY

330102 The position of some metals in the electrochemical series in decreasing electropositive character is given as Mg > Al > Zn > Cu > Ag. What will happen if a copper spoon is used to stir a solution of aluminium nitrate?

1 The solution becomes blue
2 There is no reaction
3 The spoon will get coated with aluminium
4 An alloy of aluminium and copper is formed
CHXII03:ELECTROCHEMISTRY

330099 Red hot carbon will remove oxygen from the oxides AO and BO but not from MO , while B will remove oxygen from AO. The activity of metals \(\mathrm{A}, \mathrm{B}\) and M in decreasing order is

1 A \(>\) B \(>\) M
2 B \(>\) A \(>\) M
3 \(\mathrm{M}>\mathrm{B}>\mathrm{A}\)
4 \(\mathrm{M}>\) A \(>\) B
CHXII03:ELECTROCHEMISTRY

330100 Consider the following standard electrode potentials \({\rm{(}}{{\rm{E}}^{\rm{o}}}\,\,{\rm{in}}\,\,{\rm{volts)}}\) in aqueous solution :
\({\rm{Element}}\,\,\,\,{{\rm{M}}^{{\rm{3 + }}}}{\rm{/M}}\,\,\,{{\rm{M}}^{\rm{ + }}}{\rm{/M}}\)
\(\,\,\,\,{\rm{Al}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}{\rm{.66}}\,\,\,\,\,\,\,\,\,{\rm{ + 0}}{\rm{.55}}\)
\(\,\,\,\,{\rm{Tl}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 1}}{\rm{.26}}\,\,\,\,\,\,\,\,\,{\rm{ - 0}}{\rm{.34}}\)
Based on these data, which of the following statements is correct ?

1 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
2 \({\rm{A}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
3 \({\rm{T}}{{\rm{l}}^{{\rm{3 + }}}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
4 \({\rm{T}}{{\rm{l}}^{\rm{ + }}}\) is more stable than \({\rm{A}}{{\rm{l}}^{{\rm{3 + }}}}\)
CHXII03:ELECTROCHEMISTRY

330101 Out of Cu, Ag, Fe and Zn, the metal which can displace all others from their salt solutions is

1 Ag
2 Cu
3 Zn
4 Fe
CHXII03:ELECTROCHEMISTRY

330102 The position of some metals in the electrochemical series in decreasing electropositive character is given as Mg > Al > Zn > Cu > Ag. What will happen if a copper spoon is used to stir a solution of aluminium nitrate?

1 The solution becomes blue
2 There is no reaction
3 The spoon will get coated with aluminium
4 An alloy of aluminium and copper is formed