00. Electrode Potential
ELECTROCHEMISTRY

275847 The standard reduction potentials of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$are 0.337 and 0.153 volts respectively. The standard electrode potential for $\mathrm{Cu}^{+} / \mathrm{Cu}$ half cell will be

1 $0.490 \mathrm{~V}$
2 $0.980 \mathrm{~V}$
3 $0.827 \mathrm{~V}$
4 $0.521 \mathrm{~V}$
ELECTROCHEMISTRY

275849 For the cell reaction
$\mathrm{Pb}+\mathrm{Sn}^{2+} \longrightarrow \mathrm{Pb}^{2+}+\mathrm{Sn}$
Given that, $\mathrm{Pb} \longrightarrow \mathrm{Pb}^{2+}+2 \mathrm{e}^{-}, \mathrm{E}^{\circ}=0.13 \mathrm{~V}$
$\mathrm{Sn}^{2+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Sn} ; \mathrm{E}^{\circ}=-0.14 \mathrm{~V}$
What would be the ratio of cation concentration for which $E=0$ ?

1 $1 / 4$
2 $1 / 2$
3 $1 / 3$
4 $1 / 1$
ELECTROCHEMISTRY

275852 The pressure of $\mathrm{H}_{2}$ required to make the potential of $\mathrm{H}_{2}$ electrode zero in pure water at $298 \mathrm{~K}$ is

1 $10^{-10} \mathrm{~atm}$
2 $10^{-4} \mathrm{~atm}$
3 $10^{-14} \mathrm{~atm}$
4 $10^{-12}$ atm
ELECTROCHEMISTRY

275853 Given that the standard reduction potentials for $\mathrm{M}^{+} / \mathrm{M}$ and $\mathrm{N}^{+} / \mathrm{N}$ electrodes at $298 \mathrm{~K}$ are 0.52 $\mathrm{V}$ and $0.25 \mathrm{~V}$ respectively.
Which of the following is correct in respect of the following electrochemical cell?
$\mathrm{M} / \mathrm{M}^{+} \ \vert \mathrm{N}^{+} / \mathrm{N}$

1 The overall cell reaction is a spontaneous reaction
2 The standard EMF of the cell is $-0.27 \mathrm{~V}$.
3 The standard EMF of the cell is $077 \mathrm{~V}$.
4 The standard EMF of the cell is $-0.77 \mathrm{~V}$.
ELECTROCHEMISTRY

275854 During electrolysis of $\mathrm{H}_{2} \mathrm{O}$, molar ratio of $\mathrm{H}_{2}$ and $\mathrm{O}_{2}$ produced is -

1 $2: 1$
2 $1: 2$
3 $1: 1$
4 $1: 4$
ELECTROCHEMISTRY

275847 The standard reduction potentials of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$are 0.337 and 0.153 volts respectively. The standard electrode potential for $\mathrm{Cu}^{+} / \mathrm{Cu}$ half cell will be

1 $0.490 \mathrm{~V}$
2 $0.980 \mathrm{~V}$
3 $0.827 \mathrm{~V}$
4 $0.521 \mathrm{~V}$
ELECTROCHEMISTRY

275849 For the cell reaction
$\mathrm{Pb}+\mathrm{Sn}^{2+} \longrightarrow \mathrm{Pb}^{2+}+\mathrm{Sn}$
Given that, $\mathrm{Pb} \longrightarrow \mathrm{Pb}^{2+}+2 \mathrm{e}^{-}, \mathrm{E}^{\circ}=0.13 \mathrm{~V}$
$\mathrm{Sn}^{2+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Sn} ; \mathrm{E}^{\circ}=-0.14 \mathrm{~V}$
What would be the ratio of cation concentration for which $E=0$ ?

1 $1 / 4$
2 $1 / 2$
3 $1 / 3$
4 $1 / 1$
ELECTROCHEMISTRY

275852 The pressure of $\mathrm{H}_{2}$ required to make the potential of $\mathrm{H}_{2}$ electrode zero in pure water at $298 \mathrm{~K}$ is

1 $10^{-10} \mathrm{~atm}$
2 $10^{-4} \mathrm{~atm}$
3 $10^{-14} \mathrm{~atm}$
4 $10^{-12}$ atm
ELECTROCHEMISTRY

275853 Given that the standard reduction potentials for $\mathrm{M}^{+} / \mathrm{M}$ and $\mathrm{N}^{+} / \mathrm{N}$ electrodes at $298 \mathrm{~K}$ are 0.52 $\mathrm{V}$ and $0.25 \mathrm{~V}$ respectively.
Which of the following is correct in respect of the following electrochemical cell?
$\mathrm{M} / \mathrm{M}^{+} \ \vert \mathrm{N}^{+} / \mathrm{N}$

1 The overall cell reaction is a spontaneous reaction
2 The standard EMF of the cell is $-0.27 \mathrm{~V}$.
3 The standard EMF of the cell is $077 \mathrm{~V}$.
4 The standard EMF of the cell is $-0.77 \mathrm{~V}$.
ELECTROCHEMISTRY

275854 During electrolysis of $\mathrm{H}_{2} \mathrm{O}$, molar ratio of $\mathrm{H}_{2}$ and $\mathrm{O}_{2}$ produced is -

1 $2: 1$
2 $1: 2$
3 $1: 1$
4 $1: 4$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
ELECTROCHEMISTRY

275847 The standard reduction potentials of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$are 0.337 and 0.153 volts respectively. The standard electrode potential for $\mathrm{Cu}^{+} / \mathrm{Cu}$ half cell will be

1 $0.490 \mathrm{~V}$
2 $0.980 \mathrm{~V}$
3 $0.827 \mathrm{~V}$
4 $0.521 \mathrm{~V}$
ELECTROCHEMISTRY

275849 For the cell reaction
$\mathrm{Pb}+\mathrm{Sn}^{2+} \longrightarrow \mathrm{Pb}^{2+}+\mathrm{Sn}$
Given that, $\mathrm{Pb} \longrightarrow \mathrm{Pb}^{2+}+2 \mathrm{e}^{-}, \mathrm{E}^{\circ}=0.13 \mathrm{~V}$
$\mathrm{Sn}^{2+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Sn} ; \mathrm{E}^{\circ}=-0.14 \mathrm{~V}$
What would be the ratio of cation concentration for which $E=0$ ?

1 $1 / 4$
2 $1 / 2$
3 $1 / 3$
4 $1 / 1$
ELECTROCHEMISTRY

275852 The pressure of $\mathrm{H}_{2}$ required to make the potential of $\mathrm{H}_{2}$ electrode zero in pure water at $298 \mathrm{~K}$ is

1 $10^{-10} \mathrm{~atm}$
2 $10^{-4} \mathrm{~atm}$
3 $10^{-14} \mathrm{~atm}$
4 $10^{-12}$ atm
ELECTROCHEMISTRY

275853 Given that the standard reduction potentials for $\mathrm{M}^{+} / \mathrm{M}$ and $\mathrm{N}^{+} / \mathrm{N}$ electrodes at $298 \mathrm{~K}$ are 0.52 $\mathrm{V}$ and $0.25 \mathrm{~V}$ respectively.
Which of the following is correct in respect of the following electrochemical cell?
$\mathrm{M} / \mathrm{M}^{+} \ \vert \mathrm{N}^{+} / \mathrm{N}$

1 The overall cell reaction is a spontaneous reaction
2 The standard EMF of the cell is $-0.27 \mathrm{~V}$.
3 The standard EMF of the cell is $077 \mathrm{~V}$.
4 The standard EMF of the cell is $-0.77 \mathrm{~V}$.
ELECTROCHEMISTRY

275854 During electrolysis of $\mathrm{H}_{2} \mathrm{O}$, molar ratio of $\mathrm{H}_{2}$ and $\mathrm{O}_{2}$ produced is -

1 $2: 1$
2 $1: 2$
3 $1: 1$
4 $1: 4$
ELECTROCHEMISTRY

275847 The standard reduction potentials of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$are 0.337 and 0.153 volts respectively. The standard electrode potential for $\mathrm{Cu}^{+} / \mathrm{Cu}$ half cell will be

1 $0.490 \mathrm{~V}$
2 $0.980 \mathrm{~V}$
3 $0.827 \mathrm{~V}$
4 $0.521 \mathrm{~V}$
ELECTROCHEMISTRY

275849 For the cell reaction
$\mathrm{Pb}+\mathrm{Sn}^{2+} \longrightarrow \mathrm{Pb}^{2+}+\mathrm{Sn}$
Given that, $\mathrm{Pb} \longrightarrow \mathrm{Pb}^{2+}+2 \mathrm{e}^{-}, \mathrm{E}^{\circ}=0.13 \mathrm{~V}$
$\mathrm{Sn}^{2+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Sn} ; \mathrm{E}^{\circ}=-0.14 \mathrm{~V}$
What would be the ratio of cation concentration for which $E=0$ ?

1 $1 / 4$
2 $1 / 2$
3 $1 / 3$
4 $1 / 1$
ELECTROCHEMISTRY

275852 The pressure of $\mathrm{H}_{2}$ required to make the potential of $\mathrm{H}_{2}$ electrode zero in pure water at $298 \mathrm{~K}$ is

1 $10^{-10} \mathrm{~atm}$
2 $10^{-4} \mathrm{~atm}$
3 $10^{-14} \mathrm{~atm}$
4 $10^{-12}$ atm
ELECTROCHEMISTRY

275853 Given that the standard reduction potentials for $\mathrm{M}^{+} / \mathrm{M}$ and $\mathrm{N}^{+} / \mathrm{N}$ electrodes at $298 \mathrm{~K}$ are 0.52 $\mathrm{V}$ and $0.25 \mathrm{~V}$ respectively.
Which of the following is correct in respect of the following electrochemical cell?
$\mathrm{M} / \mathrm{M}^{+} \ \vert \mathrm{N}^{+} / \mathrm{N}$

1 The overall cell reaction is a spontaneous reaction
2 The standard EMF of the cell is $-0.27 \mathrm{~V}$.
3 The standard EMF of the cell is $077 \mathrm{~V}$.
4 The standard EMF of the cell is $-0.77 \mathrm{~V}$.
ELECTROCHEMISTRY

275854 During electrolysis of $\mathrm{H}_{2} \mathrm{O}$, molar ratio of $\mathrm{H}_{2}$ and $\mathrm{O}_{2}$ produced is -

1 $2: 1$
2 $1: 2$
3 $1: 1$
4 $1: 4$
ELECTROCHEMISTRY

275847 The standard reduction potentials of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$are 0.337 and 0.153 volts respectively. The standard electrode potential for $\mathrm{Cu}^{+} / \mathrm{Cu}$ half cell will be

1 $0.490 \mathrm{~V}$
2 $0.980 \mathrm{~V}$
3 $0.827 \mathrm{~V}$
4 $0.521 \mathrm{~V}$
ELECTROCHEMISTRY

275849 For the cell reaction
$\mathrm{Pb}+\mathrm{Sn}^{2+} \longrightarrow \mathrm{Pb}^{2+}+\mathrm{Sn}$
Given that, $\mathrm{Pb} \longrightarrow \mathrm{Pb}^{2+}+2 \mathrm{e}^{-}, \mathrm{E}^{\circ}=0.13 \mathrm{~V}$
$\mathrm{Sn}^{2+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Sn} ; \mathrm{E}^{\circ}=-0.14 \mathrm{~V}$
What would be the ratio of cation concentration for which $E=0$ ?

1 $1 / 4$
2 $1 / 2$
3 $1 / 3$
4 $1 / 1$
ELECTROCHEMISTRY

275852 The pressure of $\mathrm{H}_{2}$ required to make the potential of $\mathrm{H}_{2}$ electrode zero in pure water at $298 \mathrm{~K}$ is

1 $10^{-10} \mathrm{~atm}$
2 $10^{-4} \mathrm{~atm}$
3 $10^{-14} \mathrm{~atm}$
4 $10^{-12}$ atm
ELECTROCHEMISTRY

275853 Given that the standard reduction potentials for $\mathrm{M}^{+} / \mathrm{M}$ and $\mathrm{N}^{+} / \mathrm{N}$ electrodes at $298 \mathrm{~K}$ are 0.52 $\mathrm{V}$ and $0.25 \mathrm{~V}$ respectively.
Which of the following is correct in respect of the following electrochemical cell?
$\mathrm{M} / \mathrm{M}^{+} \ \vert \mathrm{N}^{+} / \mathrm{N}$

1 The overall cell reaction is a spontaneous reaction
2 The standard EMF of the cell is $-0.27 \mathrm{~V}$.
3 The standard EMF of the cell is $077 \mathrm{~V}$.
4 The standard EMF of the cell is $-0.77 \mathrm{~V}$.
ELECTROCHEMISTRY

275854 During electrolysis of $\mathrm{H}_{2} \mathrm{O}$, molar ratio of $\mathrm{H}_{2}$ and $\mathrm{O}_{2}$ produced is -

1 $2: 1$
2 $1: 2$
3 $1: 1$
4 $1: 4$