00. Electrode Potential
ELECTROCHEMISTRY

275797 The standard electrode potential $\left(E^{0}\right)$ values of $\mathrm{Al}^{3+} / \mathrm{Al}, \mathrm{Ag}^{+} / \mathrm{Ag}, \mathrm{K}^{+} / \mathrm{K}$ and $\mathrm{Cr}^{3+} / \mathrm{Cr}$ are $-1.66 \mathrm{~V}$, $0.88 \mathrm{~V},-2.93 \mathrm{~V}$ and $-\mathbf{0 . 7 4 \mathrm { V }}$, respectively. The correct decreasing order of reducing power of the metal is

1 $\mathrm{Ag}>\mathrm{Cr}>\mathrm{Al}>\mathrm{K}$
2 $\mathrm{K}>\mathrm{Al}>\mathrm{Cr}>\mathrm{Ag}$
3 $\mathrm{K}>\mathrm{Al}>\mathrm{Ag}>\mathrm{Cr}$
4 $\mathrm{Al}>\mathrm{K}>\mathrm{Ag}>\mathrm{Cr}$
ELECTROCHEMISTRY

275800 At $298 \mathrm{~K}$ temperature, a hydrogen gas electrode is made by dipping platinum wire in a solution of $\mathrm{HCl}$ of $\mathrm{pH}=10$ and by passing hydrogen gas around the platinum wire at one atm pressure. The potential of electrode would be?

1 $0.59 \mathrm{~V}$
2 $0.118 \mathrm{~V}$
3 $1.18 \mathrm{~V}$
4 $0.059 \mathrm{~V}$
ELECTROCHEMISTRY

275801 $\quad E_{\text {cell }}$ of the following cell is
$\operatorname{Pt}(\mathbf{s}) \mid \mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\left \vert\mathrm{H}^{+}(1 \mathrm{M})\right \vert\left \vert\mathrm{H}^{+}(0.1 \mathrm{M})\right \vert$
$\mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\mid \mathrm{Pt}(\mathrm{s})$

1 $\frac{-2.303 \mathrm{RT}}{\mathrm{F}}$
2 $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$
3 $\frac{-2.303 \mathrm{RT}}{2 \mathrm{~F}}$
4 $\frac{2.303 \mathrm{RT}}{2 \mathrm{~F}}$
5 $\frac{\mathrm{RT}}{2 \mathrm{~F}}$
ELECTROCHEMISTRY

275802 Calculate E.M.F of following cell at $298 \mathrm{~K}$ $\mathrm{Zn}(\mathrm{s})\left \vert\mathrm{ZnSO}_{4}(\mathbf{0 . 0 1 M})\right \vert\left \vert\mathrm{CuSO}_{4}(1.0 \mathrm{M})\right \vert \mathrm{Cu}(\mathrm{s})$ if $\mathrm{E}_{\text {cell }}^{\mathrm{o}}=\mathbf{2 . 0} \mathrm{V}$

1 $2.0 \mathrm{~V}$
2 $2.0592 \mathrm{~V}$
3 $2.0296 \mathrm{~V}$
4 $1.0508 \mathrm{~V}$
ELECTROCHEMISTRY

275797 The standard electrode potential $\left(E^{0}\right)$ values of $\mathrm{Al}^{3+} / \mathrm{Al}, \mathrm{Ag}^{+} / \mathrm{Ag}, \mathrm{K}^{+} / \mathrm{K}$ and $\mathrm{Cr}^{3+} / \mathrm{Cr}$ are $-1.66 \mathrm{~V}$, $0.88 \mathrm{~V},-2.93 \mathrm{~V}$ and $-\mathbf{0 . 7 4 \mathrm { V }}$, respectively. The correct decreasing order of reducing power of the metal is

1 $\mathrm{Ag}>\mathrm{Cr}>\mathrm{Al}>\mathrm{K}$
2 $\mathrm{K}>\mathrm{Al}>\mathrm{Cr}>\mathrm{Ag}$
3 $\mathrm{K}>\mathrm{Al}>\mathrm{Ag}>\mathrm{Cr}$
4 $\mathrm{Al}>\mathrm{K}>\mathrm{Ag}>\mathrm{Cr}$
ELECTROCHEMISTRY

275800 At $298 \mathrm{~K}$ temperature, a hydrogen gas electrode is made by dipping platinum wire in a solution of $\mathrm{HCl}$ of $\mathrm{pH}=10$ and by passing hydrogen gas around the platinum wire at one atm pressure. The potential of electrode would be?

1 $0.59 \mathrm{~V}$
2 $0.118 \mathrm{~V}$
3 $1.18 \mathrm{~V}$
4 $0.059 \mathrm{~V}$
ELECTROCHEMISTRY

275801 $\quad E_{\text {cell }}$ of the following cell is
$\operatorname{Pt}(\mathbf{s}) \mid \mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\left \vert\mathrm{H}^{+}(1 \mathrm{M})\right \vert\left \vert\mathrm{H}^{+}(0.1 \mathrm{M})\right \vert$
$\mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\mid \mathrm{Pt}(\mathrm{s})$

1 $\frac{-2.303 \mathrm{RT}}{\mathrm{F}}$
2 $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$
3 $\frac{-2.303 \mathrm{RT}}{2 \mathrm{~F}}$
4 $\frac{2.303 \mathrm{RT}}{2 \mathrm{~F}}$
5 $\frac{\mathrm{RT}}{2 \mathrm{~F}}$
ELECTROCHEMISTRY

275802 Calculate E.M.F of following cell at $298 \mathrm{~K}$ $\mathrm{Zn}(\mathrm{s})\left \vert\mathrm{ZnSO}_{4}(\mathbf{0 . 0 1 M})\right \vert\left \vert\mathrm{CuSO}_{4}(1.0 \mathrm{M})\right \vert \mathrm{Cu}(\mathrm{s})$ if $\mathrm{E}_{\text {cell }}^{\mathrm{o}}=\mathbf{2 . 0} \mathrm{V}$

1 $2.0 \mathrm{~V}$
2 $2.0592 \mathrm{~V}$
3 $2.0296 \mathrm{~V}$
4 $1.0508 \mathrm{~V}$
ELECTROCHEMISTRY

275797 The standard electrode potential $\left(E^{0}\right)$ values of $\mathrm{Al}^{3+} / \mathrm{Al}, \mathrm{Ag}^{+} / \mathrm{Ag}, \mathrm{K}^{+} / \mathrm{K}$ and $\mathrm{Cr}^{3+} / \mathrm{Cr}$ are $-1.66 \mathrm{~V}$, $0.88 \mathrm{~V},-2.93 \mathrm{~V}$ and $-\mathbf{0 . 7 4 \mathrm { V }}$, respectively. The correct decreasing order of reducing power of the metal is

1 $\mathrm{Ag}>\mathrm{Cr}>\mathrm{Al}>\mathrm{K}$
2 $\mathrm{K}>\mathrm{Al}>\mathrm{Cr}>\mathrm{Ag}$
3 $\mathrm{K}>\mathrm{Al}>\mathrm{Ag}>\mathrm{Cr}$
4 $\mathrm{Al}>\mathrm{K}>\mathrm{Ag}>\mathrm{Cr}$
ELECTROCHEMISTRY

275800 At $298 \mathrm{~K}$ temperature, a hydrogen gas electrode is made by dipping platinum wire in a solution of $\mathrm{HCl}$ of $\mathrm{pH}=10$ and by passing hydrogen gas around the platinum wire at one atm pressure. The potential of electrode would be?

1 $0.59 \mathrm{~V}$
2 $0.118 \mathrm{~V}$
3 $1.18 \mathrm{~V}$
4 $0.059 \mathrm{~V}$
ELECTROCHEMISTRY

275801 $\quad E_{\text {cell }}$ of the following cell is
$\operatorname{Pt}(\mathbf{s}) \mid \mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\left \vert\mathrm{H}^{+}(1 \mathrm{M})\right \vert\left \vert\mathrm{H}^{+}(0.1 \mathrm{M})\right \vert$
$\mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\mid \mathrm{Pt}(\mathrm{s})$

1 $\frac{-2.303 \mathrm{RT}}{\mathrm{F}}$
2 $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$
3 $\frac{-2.303 \mathrm{RT}}{2 \mathrm{~F}}$
4 $\frac{2.303 \mathrm{RT}}{2 \mathrm{~F}}$
5 $\frac{\mathrm{RT}}{2 \mathrm{~F}}$
ELECTROCHEMISTRY

275802 Calculate E.M.F of following cell at $298 \mathrm{~K}$ $\mathrm{Zn}(\mathrm{s})\left \vert\mathrm{ZnSO}_{4}(\mathbf{0 . 0 1 M})\right \vert\left \vert\mathrm{CuSO}_{4}(1.0 \mathrm{M})\right \vert \mathrm{Cu}(\mathrm{s})$ if $\mathrm{E}_{\text {cell }}^{\mathrm{o}}=\mathbf{2 . 0} \mathrm{V}$

1 $2.0 \mathrm{~V}$
2 $2.0592 \mathrm{~V}$
3 $2.0296 \mathrm{~V}$
4 $1.0508 \mathrm{~V}$
ELECTROCHEMISTRY

275797 The standard electrode potential $\left(E^{0}\right)$ values of $\mathrm{Al}^{3+} / \mathrm{Al}, \mathrm{Ag}^{+} / \mathrm{Ag}, \mathrm{K}^{+} / \mathrm{K}$ and $\mathrm{Cr}^{3+} / \mathrm{Cr}$ are $-1.66 \mathrm{~V}$, $0.88 \mathrm{~V},-2.93 \mathrm{~V}$ and $-\mathbf{0 . 7 4 \mathrm { V }}$, respectively. The correct decreasing order of reducing power of the metal is

1 $\mathrm{Ag}>\mathrm{Cr}>\mathrm{Al}>\mathrm{K}$
2 $\mathrm{K}>\mathrm{Al}>\mathrm{Cr}>\mathrm{Ag}$
3 $\mathrm{K}>\mathrm{Al}>\mathrm{Ag}>\mathrm{Cr}$
4 $\mathrm{Al}>\mathrm{K}>\mathrm{Ag}>\mathrm{Cr}$
ELECTROCHEMISTRY

275800 At $298 \mathrm{~K}$ temperature, a hydrogen gas electrode is made by dipping platinum wire in a solution of $\mathrm{HCl}$ of $\mathrm{pH}=10$ and by passing hydrogen gas around the platinum wire at one atm pressure. The potential of electrode would be?

1 $0.59 \mathrm{~V}$
2 $0.118 \mathrm{~V}$
3 $1.18 \mathrm{~V}$
4 $0.059 \mathrm{~V}$
ELECTROCHEMISTRY

275801 $\quad E_{\text {cell }}$ of the following cell is
$\operatorname{Pt}(\mathbf{s}) \mid \mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\left \vert\mathrm{H}^{+}(1 \mathrm{M})\right \vert\left \vert\mathrm{H}^{+}(0.1 \mathrm{M})\right \vert$
$\mathbf{H}_{2}(\mathrm{~g}), 1$ bar $\mid \mathrm{Pt}(\mathrm{s})$

1 $\frac{-2.303 \mathrm{RT}}{\mathrm{F}}$
2 $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$
3 $\frac{-2.303 \mathrm{RT}}{2 \mathrm{~F}}$
4 $\frac{2.303 \mathrm{RT}}{2 \mathrm{~F}}$
5 $\frac{\mathrm{RT}}{2 \mathrm{~F}}$
ELECTROCHEMISTRY

275802 Calculate E.M.F of following cell at $298 \mathrm{~K}$ $\mathrm{Zn}(\mathrm{s})\left \vert\mathrm{ZnSO}_{4}(\mathbf{0 . 0 1 M})\right \vert\left \vert\mathrm{CuSO}_{4}(1.0 \mathrm{M})\right \vert \mathrm{Cu}(\mathrm{s})$ if $\mathrm{E}_{\text {cell }}^{\mathrm{o}}=\mathbf{2 . 0} \mathrm{V}$

1 $2.0 \mathrm{~V}$
2 $2.0592 \mathrm{~V}$
3 $2.0296 \mathrm{~V}$
4 $1.0508 \mathrm{~V}$