00. Electrode Potential
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ELECTROCHEMISTRY

275785 The correct order of $E^{0}$ values of the given
elements is $\left(\mathrm{M}^{2+}+2 \mathrm{e}^{-} \rightarrow M(\mathrm{~s})\right)$

1 $\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Fe}^{2+}$
2 $\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}$
3 $\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Pb}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
Shift-II
ELECTROCHEMISTRY

275809 For the cell,
$\mathbf{Z n}(\mathbf{s}) \mid \mathbf{Z n}^{2+}$ (aq) \vert \vert $\mathbf{M}^{\mathbf{x}^{+}}$(aq) $\mid \mathbf{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below.
| $\mathrm{M}^{\mathrm{x}}$ | | | | |
| :--- | :--- | :--- | :--- | :--- |
| $(\mathrm{aq}) /$ | $\mathrm{Au}^{3+}$ | | | |
| $\mathrm{M}(\mathrm{s}) /$ | $\begin{array}{l}\mathrm{Ag}^{+} \\ (\mathrm{Ag}) /\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{3+}(\mathrm{aq}) / / \mathrm{Fe}^{2+}(\mathrm{aq})\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{2+} \\ (\mathrm{aq}) / \\ \mathrm{Fe}(\mathrm{s})\end{array}$ | |
| $\mathrm{E}^{0} \mathrm{M}^{\mathrm{x}} / \mathrm{M} / \mathrm{V}$ | 1.40 | 0.80 | 0.77 | -0.44 |
If $\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}$, which cathode will give a maximum value of $E^{0}$ cell per electron transferred?

1 $\frac{\mathrm{Ag}^{+}}{\mathrm{Ag}}$
2 $\frac{\mathrm{Fe}^{2+}}{\mathrm{Fe}}$
3 $\frac{\mathrm{Au}^{3+}}{\mathrm{Au}}$
4 $\frac{\mathrm{Fe}^{3+}}{\mathrm{Fe}^{2+}}$
JEE Main 2019
ELECTROCHEMISTRY

275856 The value $E_{\text {rad }}^{0}$ for metal, $A, B$ and $C$ are 0.34 volt $-\mathbf{0 . 8 0}$ and $\mathbf{- 0 . 4 6}$ volt respectively state the correct order for their ability to act a reducing agent.

1 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
2 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
3 $\mathrm{B}>\mathrm{C}>\mathrm{A}$
4 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
GUJCET-2016
ELECTROCHEMISTRY

275877 Match the following-
| Column I | | Column II | |
| :--- | :--- | :--- | :--- |
| A | Potential of hydrogen
electrode at $\mathrm{pH}=10$ | 1 | 0.76 V |
| B | $\mathrm{Cu}^{2+} \mid \mathrm{Cu}$ | 2 | 0.059 V |
| C | $\mathrm{Zn} \mid \mathrm{Zn}^{2+}$ | 3 | -0.591 V |
| D | $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$ | 4 | 0.337 V |

1 A = 3, B = 1, C = 2, D = 5
2 A = 2, B = 5, C = 1, D = 4
3 A = 3, B = 4, C = 1, D = 2
4 A = 5, B = 1, C = 4, D = 2
BCECE-2014
NEET DIGITAL LIBRARY
ELECTROCHEMISTRY

275785 The correct order of $E^{0}$ values of the given
elements is $\left(\mathrm{M}^{2+}+2 \mathrm{e}^{-} \rightarrow M(\mathrm{~s})\right)$

1 $\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Fe}^{2+}$
2 $\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}$
3 $\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Pb}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
Shift-II
ELECTROCHEMISTRY

275809 For the cell,
$\mathbf{Z n}(\mathbf{s}) \mid \mathbf{Z n}^{2+}$ (aq) \vert \vert $\mathbf{M}^{\mathbf{x}^{+}}$(aq) $\mid \mathbf{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below.
| $\mathrm{M}^{\mathrm{x}}$ | | | | |
| :--- | :--- | :--- | :--- | :--- |
| $(\mathrm{aq}) /$ | $\mathrm{Au}^{3+}$ | | | |
| $\mathrm{M}(\mathrm{s}) /$ | $\begin{array}{l}\mathrm{Ag}^{+} \\ (\mathrm{Ag}) /\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{3+}(\mathrm{aq}) / / \mathrm{Fe}^{2+}(\mathrm{aq})\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{2+} \\ (\mathrm{aq}) / \\ \mathrm{Fe}(\mathrm{s})\end{array}$ | |
| $\mathrm{E}^{0} \mathrm{M}^{\mathrm{x}} / \mathrm{M} / \mathrm{V}$ | 1.40 | 0.80 | 0.77 | -0.44 |
If $\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}$, which cathode will give a maximum value of $E^{0}$ cell per electron transferred?

1 $\frac{\mathrm{Ag}^{+}}{\mathrm{Ag}}$
2 $\frac{\mathrm{Fe}^{2+}}{\mathrm{Fe}}$
3 $\frac{\mathrm{Au}^{3+}}{\mathrm{Au}}$
4 $\frac{\mathrm{Fe}^{3+}}{\mathrm{Fe}^{2+}}$
JEE Main 2019
ELECTROCHEMISTRY

275856 The value $E_{\text {rad }}^{0}$ for metal, $A, B$ and $C$ are 0.34 volt $-\mathbf{0 . 8 0}$ and $\mathbf{- 0 . 4 6}$ volt respectively state the correct order for their ability to act a reducing agent.

1 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
2 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
3 $\mathrm{B}>\mathrm{C}>\mathrm{A}$
4 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
GUJCET-2016
ELECTROCHEMISTRY

275877 Match the following-
| Column I | | Column II | |
| :--- | :--- | :--- | :--- |
| A | Potential of hydrogen
electrode at $\mathrm{pH}=10$ | 1 | 0.76 V |
| B | $\mathrm{Cu}^{2+} \mid \mathrm{Cu}$ | 2 | 0.059 V |
| C | $\mathrm{Zn} \mid \mathrm{Zn}^{2+}$ | 3 | -0.591 V |
| D | $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$ | 4 | 0.337 V |

1 A = 3, B = 1, C = 2, D = 5
2 A = 2, B = 5, C = 1, D = 4
3 A = 3, B = 4, C = 1, D = 2
4 A = 5, B = 1, C = 4, D = 2
BCECE-2014
Join With Us for More Updates
ELECTROCHEMISTRY

275785 The correct order of $E^{0}$ values of the given
elements is $\left(\mathrm{M}^{2+}+2 \mathrm{e}^{-} \rightarrow M(\mathrm{~s})\right)$

1 $\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Fe}^{2+}$
2 $\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}$
3 $\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Pb}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
Shift-II
ELECTROCHEMISTRY

275809 For the cell,
$\mathbf{Z n}(\mathbf{s}) \mid \mathbf{Z n}^{2+}$ (aq) \vert \vert $\mathbf{M}^{\mathbf{x}^{+}}$(aq) $\mid \mathbf{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below.
| $\mathrm{M}^{\mathrm{x}}$ | | | | |
| :--- | :--- | :--- | :--- | :--- |
| $(\mathrm{aq}) /$ | $\mathrm{Au}^{3+}$ | | | |
| $\mathrm{M}(\mathrm{s}) /$ | $\begin{array}{l}\mathrm{Ag}^{+} \\ (\mathrm{Ag}) /\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{3+}(\mathrm{aq}) / / \mathrm{Fe}^{2+}(\mathrm{aq})\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{2+} \\ (\mathrm{aq}) / \\ \mathrm{Fe}(\mathrm{s})\end{array}$ | |
| $\mathrm{E}^{0} \mathrm{M}^{\mathrm{x}} / \mathrm{M} / \mathrm{V}$ | 1.40 | 0.80 | 0.77 | -0.44 |
If $\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}$, which cathode will give a maximum value of $E^{0}$ cell per electron transferred?

1 $\frac{\mathrm{Ag}^{+}}{\mathrm{Ag}}$
2 $\frac{\mathrm{Fe}^{2+}}{\mathrm{Fe}}$
3 $\frac{\mathrm{Au}^{3+}}{\mathrm{Au}}$
4 $\frac{\mathrm{Fe}^{3+}}{\mathrm{Fe}^{2+}}$
JEE Main 2019
ELECTROCHEMISTRY

275856 The value $E_{\text {rad }}^{0}$ for metal, $A, B$ and $C$ are 0.34 volt $-\mathbf{0 . 8 0}$ and $\mathbf{- 0 . 4 6}$ volt respectively state the correct order for their ability to act a reducing agent.

1 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
2 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
3 $\mathrm{B}>\mathrm{C}>\mathrm{A}$
4 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
GUJCET-2016
ELECTROCHEMISTRY

275877 Match the following-
| Column I | | Column II | |
| :--- | :--- | :--- | :--- |
| A | Potential of hydrogen
electrode at $\mathrm{pH}=10$ | 1 | 0.76 V |
| B | $\mathrm{Cu}^{2+} \mid \mathrm{Cu}$ | 2 | 0.059 V |
| C | $\mathrm{Zn} \mid \mathrm{Zn}^{2+}$ | 3 | -0.591 V |
| D | $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$ | 4 | 0.337 V |

1 A = 3, B = 1, C = 2, D = 5
2 A = 2, B = 5, C = 1, D = 4
3 A = 3, B = 4, C = 1, D = 2
4 A = 5, B = 1, C = 4, D = 2
BCECE-2014
For More Updates join with Us
ELECTROCHEMISTRY

275785 The correct order of $E^{0}$ values of the given
elements is $\left(\mathrm{M}^{2+}+2 \mathrm{e}^{-} \rightarrow M(\mathrm{~s})\right)$

1 $\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Fe}^{2+}$
2 $\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}$
3 $\mathrm{Cu}^{2+}>\mathrm{Pb}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Pb}^{2+}>\mathrm{Cu}^{2+}>\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}$
Shift-II
ELECTROCHEMISTRY

275809 For the cell,
$\mathbf{Z n}(\mathbf{s}) \mid \mathbf{Z n}^{2+}$ (aq) \vert \vert $\mathbf{M}^{\mathbf{x}^{+}}$(aq) $\mid \mathbf{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below.
| $\mathrm{M}^{\mathrm{x}}$ | | | | |
| :--- | :--- | :--- | :--- | :--- |
| $(\mathrm{aq}) /$ | $\mathrm{Au}^{3+}$ | | | |
| $\mathrm{M}(\mathrm{s}) /$ | $\begin{array}{l}\mathrm{Ag}^{+} \\ (\mathrm{Ag}) /\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{3+}(\mathrm{aq}) / / \mathrm{Fe}^{2+}(\mathrm{aq})\end{array}$ | $\begin{array}{l}\mathrm{Fe}^{2+} \\ (\mathrm{aq}) / \\ \mathrm{Fe}(\mathrm{s})\end{array}$ | |
| $\mathrm{E}^{0} \mathrm{M}^{\mathrm{x}} / \mathrm{M} / \mathrm{V}$ | 1.40 | 0.80 | 0.77 | -0.44 |
If $\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}$, which cathode will give a maximum value of $E^{0}$ cell per electron transferred?

1 $\frac{\mathrm{Ag}^{+}}{\mathrm{Ag}}$
2 $\frac{\mathrm{Fe}^{2+}}{\mathrm{Fe}}$
3 $\frac{\mathrm{Au}^{3+}}{\mathrm{Au}}$
4 $\frac{\mathrm{Fe}^{3+}}{\mathrm{Fe}^{2+}}$
JEE Main 2019
ELECTROCHEMISTRY

275856 The value $E_{\text {rad }}^{0}$ for metal, $A, B$ and $C$ are 0.34 volt $-\mathbf{0 . 8 0}$ and $\mathbf{- 0 . 4 6}$ volt respectively state the correct order for their ability to act a reducing agent.

1 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
2 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
3 $\mathrm{B}>\mathrm{C}>\mathrm{A}$
4 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
GUJCET-2016
ELECTROCHEMISTRY

275877 Match the following-
| Column I | | Column II | |
| :--- | :--- | :--- | :--- |
| A | Potential of hydrogen
electrode at $\mathrm{pH}=10$ | 1 | 0.76 V |
| B | $\mathrm{Cu}^{2+} \mid \mathrm{Cu}$ | 2 | 0.059 V |
| C | $\mathrm{Zn} \mid \mathrm{Zn}^{2+}$ | 3 | -0.591 V |
| D | $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$ | 4 | 0.337 V |

1 A = 3, B = 1, C = 2, D = 5
2 A = 2, B = 5, C = 1, D = 4
3 A = 3, B = 4, C = 1, D = 2
4 A = 5, B = 1, C = 4, D = 2
BCECE-2014