Electrochemical Cells or Galvanic Cells
CHXII03:ELECTROCHEMISTRY

330058 Given below are half cell reactions :
\(MnO_4^ - + 8{H^ + }5{e^ - } \to M{n^{2 + }} + 4{H_2}O,\)
\({\rm{E}}_{{\rm{M}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{/MnO}}_{\rm{4}}^{\rm{ - }}}^{\rm{o}}{\rm{ = - 1}}{\rm{.510V}}\)
\(\frac{1}{2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O\)
\({\rm{E}}_{{{\rm{O}}_{\rm{2}}}{\rm{/}}{{\rm{H}}_{\rm{2}}}{\rm{O}}}^{\rm{o}}{\rm{ = + 1}}{\rm{.223V}}\)
Will the permanganate ion, \({\rm{MnO}}_{\rm{4}}^{\rm{ - }}\,\,{\rm{liberate}}\,\,{{\rm{O}}_{\rm{2}}}\) from water in the presence of an acid ?

1 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 0}}{\rm{.287 V}}\)
2 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 2}}{\rm{.733 V}}\)
3 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 2}}{\rm{.733 V}}\)
4 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 0}}{\rm{.287 V}}\)
CHXII03:ELECTROCHEMISTRY

330059 Assertion :
The potential difference between the two electrodes of a galvanic cell is called the cell potential.
Reason :
Cell potential is equal to the emf of a cell.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330060 The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called ....

1 Cell voltage
2 Cell difference
3 Cell potential
4 Cell emf
CHXII03:ELECTROCHEMISTRY

330061 I.
The potential of individual half-cell can be measured.
II.
Difference between the potentials of two half-cells can only be measured.
III.
\(\left. {{\rm{Pt(s)}}} \right \vert \left. {{{\rm{H}}_{\rm{2}}}{\rm{(g)}}} \right \vert {{\rm{H}}^{\rm{ + }}}{\rm{(aq)}}\) half-cell is called standard hydrogen electrode.
Select the correct statement(s) and choose the appropriate option.

1 I and II
2 II and III
3 III and I
4 I, II and III
CHXII03:ELECTROCHEMISTRY

330058 Given below are half cell reactions :
\(MnO_4^ - + 8{H^ + }5{e^ - } \to M{n^{2 + }} + 4{H_2}O,\)
\({\rm{E}}_{{\rm{M}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{/MnO}}_{\rm{4}}^{\rm{ - }}}^{\rm{o}}{\rm{ = - 1}}{\rm{.510V}}\)
\(\frac{1}{2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O\)
\({\rm{E}}_{{{\rm{O}}_{\rm{2}}}{\rm{/}}{{\rm{H}}_{\rm{2}}}{\rm{O}}}^{\rm{o}}{\rm{ = + 1}}{\rm{.223V}}\)
Will the permanganate ion, \({\rm{MnO}}_{\rm{4}}^{\rm{ - }}\,\,{\rm{liberate}}\,\,{{\rm{O}}_{\rm{2}}}\) from water in the presence of an acid ?

1 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 0}}{\rm{.287 V}}\)
2 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 2}}{\rm{.733 V}}\)
3 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 2}}{\rm{.733 V}}\)
4 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 0}}{\rm{.287 V}}\)
CHXII03:ELECTROCHEMISTRY

330059 Assertion :
The potential difference between the two electrodes of a galvanic cell is called the cell potential.
Reason :
Cell potential is equal to the emf of a cell.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330060 The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called ....

1 Cell voltage
2 Cell difference
3 Cell potential
4 Cell emf
CHXII03:ELECTROCHEMISTRY

330061 I.
The potential of individual half-cell can be measured.
II.
Difference between the potentials of two half-cells can only be measured.
III.
\(\left. {{\rm{Pt(s)}}} \right \vert \left. {{{\rm{H}}_{\rm{2}}}{\rm{(g)}}} \right \vert {{\rm{H}}^{\rm{ + }}}{\rm{(aq)}}\) half-cell is called standard hydrogen electrode.
Select the correct statement(s) and choose the appropriate option.

1 I and II
2 II and III
3 III and I
4 I, II and III
CHXII03:ELECTROCHEMISTRY

330058 Given below are half cell reactions :
\(MnO_4^ - + 8{H^ + }5{e^ - } \to M{n^{2 + }} + 4{H_2}O,\)
\({\rm{E}}_{{\rm{M}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{/MnO}}_{\rm{4}}^{\rm{ - }}}^{\rm{o}}{\rm{ = - 1}}{\rm{.510V}}\)
\(\frac{1}{2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O\)
\({\rm{E}}_{{{\rm{O}}_{\rm{2}}}{\rm{/}}{{\rm{H}}_{\rm{2}}}{\rm{O}}}^{\rm{o}}{\rm{ = + 1}}{\rm{.223V}}\)
Will the permanganate ion, \({\rm{MnO}}_{\rm{4}}^{\rm{ - }}\,\,{\rm{liberate}}\,\,{{\rm{O}}_{\rm{2}}}\) from water in the presence of an acid ?

1 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 0}}{\rm{.287 V}}\)
2 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 2}}{\rm{.733 V}}\)
3 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 2}}{\rm{.733 V}}\)
4 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 0}}{\rm{.287 V}}\)
CHXII03:ELECTROCHEMISTRY

330059 Assertion :
The potential difference between the two electrodes of a galvanic cell is called the cell potential.
Reason :
Cell potential is equal to the emf of a cell.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330060 The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called ....

1 Cell voltage
2 Cell difference
3 Cell potential
4 Cell emf
CHXII03:ELECTROCHEMISTRY

330061 I.
The potential of individual half-cell can be measured.
II.
Difference between the potentials of two half-cells can only be measured.
III.
\(\left. {{\rm{Pt(s)}}} \right \vert \left. {{{\rm{H}}_{\rm{2}}}{\rm{(g)}}} \right \vert {{\rm{H}}^{\rm{ + }}}{\rm{(aq)}}\) half-cell is called standard hydrogen electrode.
Select the correct statement(s) and choose the appropriate option.

1 I and II
2 II and III
3 III and I
4 I, II and III
CHXII03:ELECTROCHEMISTRY

330058 Given below are half cell reactions :
\(MnO_4^ - + 8{H^ + }5{e^ - } \to M{n^{2 + }} + 4{H_2}O,\)
\({\rm{E}}_{{\rm{M}}{{\rm{n}}^{{\rm{2 + }}}}{\rm{/MnO}}_{\rm{4}}^{\rm{ - }}}^{\rm{o}}{\rm{ = - 1}}{\rm{.510V}}\)
\(\frac{1}{2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O\)
\({\rm{E}}_{{{\rm{O}}_{\rm{2}}}{\rm{/}}{{\rm{H}}_{\rm{2}}}{\rm{O}}}^{\rm{o}}{\rm{ = + 1}}{\rm{.223V}}\)
Will the permanganate ion, \({\rm{MnO}}_{\rm{4}}^{\rm{ - }}\,\,{\rm{liberate}}\,\,{{\rm{O}}_{\rm{2}}}\) from water in the presence of an acid ?

1 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 0}}{\rm{.287 V}}\)
2 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 2}}{\rm{.733 V}}\)
3 No, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = - 2}}{\rm{.733 V}}\)
4 Yes, because \({\rm{E}}_{{\rm{cell}}}^{\rm{o}}{\rm{ = + 0}}{\rm{.287 V}}\)
CHXII03:ELECTROCHEMISTRY

330059 Assertion :
The potential difference between the two electrodes of a galvanic cell is called the cell potential.
Reason :
Cell potential is equal to the emf of a cell.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330060 The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called ....

1 Cell voltage
2 Cell difference
3 Cell potential
4 Cell emf
CHXII03:ELECTROCHEMISTRY

330061 I.
The potential of individual half-cell can be measured.
II.
Difference between the potentials of two half-cells can only be measured.
III.
\(\left. {{\rm{Pt(s)}}} \right \vert \left. {{{\rm{H}}_{\rm{2}}}{\rm{(g)}}} \right \vert {{\rm{H}}^{\rm{ + }}}{\rm{(aq)}}\) half-cell is called standard hydrogen electrode.
Select the correct statement(s) and choose the appropriate option.

1 I and II
2 II and III
3 III and I
4 I, II and III