00. Electrode Potential
ELECTROCHEMISTRY

275864 A hydrogen electrode is immersed in a solution with $\mathrm{pH}=0(\mathrm{HCl})$. By how much will the potential (reduction) change if an equivalent amount of $\mathrm{NaOH}$ is added to the solution.
(Take $P_{\mathrm{H}_{2}}=1 \mathrm{~atm}, \mathrm{~T}=298 \mathrm{~K}$ )

1 increase by $0.41 \mathrm{~V}$
2 increase by $59 \mathrm{mV}$
3 decrease by $0.41 \mathrm{~V}$
4 decrease by $59 \mathrm{~m} \mathrm{~V}$
ELECTROCHEMISTRY

275865 The standard reduction potentials for the following reactions are
$\mathrm{Fe}^{3+}+3 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.036 \mathrm{~V}$
$\mathrm{Fe}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.44 \mathrm{~V}$
What would be one standard electrode potential for the reaction
$\mathrm{Fe}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+}$ ?

1 $0.772 \mathrm{~V}$
2 $0.077 \mathrm{~V}$
3 $-0.404 \mathrm{~V}$
4 $-0.772 \mathrm{~V}$
ELECTROCHEMISTRY

275937 An acidified solution of $0.1 \mathrm{M} \mathrm{CuSO}_{4}$ is electrolysed using platinum electrodes. What is the reaction that occurs at the anode?

1 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+2}+2 \mathrm{e}$
2 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+}+\mathrm{e}^{-}$
3 $2 \mathrm{H}_{2} \mathrm{O} \rightarrow+4 \mathrm{H}^{+}+\mathrm{O}_{2} \uparrow+4 \mathrm{e}^{-}$
4 None of the above
ELECTROCHEMISTRY

275866 What pressure of $\mathrm{H}_{2}$ would be required to make emf of the hydrogen electrode zero in pure water at $25^{\circ} \mathrm{C}$ ?

1 $10^{-7} \mathrm{~atm}$
2 $10^{-14} \mathrm{~atm}$
3 $1 \mathrm{~atm}$
4 $0.5 \mathrm{~atm}$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
ELECTROCHEMISTRY

275864 A hydrogen electrode is immersed in a solution with $\mathrm{pH}=0(\mathrm{HCl})$. By how much will the potential (reduction) change if an equivalent amount of $\mathrm{NaOH}$ is added to the solution.
(Take $P_{\mathrm{H}_{2}}=1 \mathrm{~atm}, \mathrm{~T}=298 \mathrm{~K}$ )

1 increase by $0.41 \mathrm{~V}$
2 increase by $59 \mathrm{mV}$
3 decrease by $0.41 \mathrm{~V}$
4 decrease by $59 \mathrm{~m} \mathrm{~V}$
ELECTROCHEMISTRY

275865 The standard reduction potentials for the following reactions are
$\mathrm{Fe}^{3+}+3 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.036 \mathrm{~V}$
$\mathrm{Fe}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.44 \mathrm{~V}$
What would be one standard electrode potential for the reaction
$\mathrm{Fe}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+}$ ?

1 $0.772 \mathrm{~V}$
2 $0.077 \mathrm{~V}$
3 $-0.404 \mathrm{~V}$
4 $-0.772 \mathrm{~V}$
ELECTROCHEMISTRY

275937 An acidified solution of $0.1 \mathrm{M} \mathrm{CuSO}_{4}$ is electrolysed using platinum electrodes. What is the reaction that occurs at the anode?

1 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+2}+2 \mathrm{e}$
2 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+}+\mathrm{e}^{-}$
3 $2 \mathrm{H}_{2} \mathrm{O} \rightarrow+4 \mathrm{H}^{+}+\mathrm{O}_{2} \uparrow+4 \mathrm{e}^{-}$
4 None of the above
ELECTROCHEMISTRY

275866 What pressure of $\mathrm{H}_{2}$ would be required to make emf of the hydrogen electrode zero in pure water at $25^{\circ} \mathrm{C}$ ?

1 $10^{-7} \mathrm{~atm}$
2 $10^{-14} \mathrm{~atm}$
3 $1 \mathrm{~atm}$
4 $0.5 \mathrm{~atm}$
ELECTROCHEMISTRY

275864 A hydrogen electrode is immersed in a solution with $\mathrm{pH}=0(\mathrm{HCl})$. By how much will the potential (reduction) change if an equivalent amount of $\mathrm{NaOH}$ is added to the solution.
(Take $P_{\mathrm{H}_{2}}=1 \mathrm{~atm}, \mathrm{~T}=298 \mathrm{~K}$ )

1 increase by $0.41 \mathrm{~V}$
2 increase by $59 \mathrm{mV}$
3 decrease by $0.41 \mathrm{~V}$
4 decrease by $59 \mathrm{~m} \mathrm{~V}$
ELECTROCHEMISTRY

275865 The standard reduction potentials for the following reactions are
$\mathrm{Fe}^{3+}+3 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.036 \mathrm{~V}$
$\mathrm{Fe}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.44 \mathrm{~V}$
What would be one standard electrode potential for the reaction
$\mathrm{Fe}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+}$ ?

1 $0.772 \mathrm{~V}$
2 $0.077 \mathrm{~V}$
3 $-0.404 \mathrm{~V}$
4 $-0.772 \mathrm{~V}$
ELECTROCHEMISTRY

275937 An acidified solution of $0.1 \mathrm{M} \mathrm{CuSO}_{4}$ is electrolysed using platinum electrodes. What is the reaction that occurs at the anode?

1 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+2}+2 \mathrm{e}$
2 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+}+\mathrm{e}^{-}$
3 $2 \mathrm{H}_{2} \mathrm{O} \rightarrow+4 \mathrm{H}^{+}+\mathrm{O}_{2} \uparrow+4 \mathrm{e}^{-}$
4 None of the above
ELECTROCHEMISTRY

275866 What pressure of $\mathrm{H}_{2}$ would be required to make emf of the hydrogen electrode zero in pure water at $25^{\circ} \mathrm{C}$ ?

1 $10^{-7} \mathrm{~atm}$
2 $10^{-14} \mathrm{~atm}$
3 $1 \mathrm{~atm}$
4 $0.5 \mathrm{~atm}$
ELECTROCHEMISTRY

275864 A hydrogen electrode is immersed in a solution with $\mathrm{pH}=0(\mathrm{HCl})$. By how much will the potential (reduction) change if an equivalent amount of $\mathrm{NaOH}$ is added to the solution.
(Take $P_{\mathrm{H}_{2}}=1 \mathrm{~atm}, \mathrm{~T}=298 \mathrm{~K}$ )

1 increase by $0.41 \mathrm{~V}$
2 increase by $59 \mathrm{mV}$
3 decrease by $0.41 \mathrm{~V}$
4 decrease by $59 \mathrm{~m} \mathrm{~V}$
ELECTROCHEMISTRY

275865 The standard reduction potentials for the following reactions are
$\mathrm{Fe}^{3+}+3 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.036 \mathrm{~V}$
$\mathrm{Fe}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}$ with $\mathrm{E}^{0}=-0.44 \mathrm{~V}$
What would be one standard electrode potential for the reaction
$\mathrm{Fe}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+}$ ?

1 $0.772 \mathrm{~V}$
2 $0.077 \mathrm{~V}$
3 $-0.404 \mathrm{~V}$
4 $-0.772 \mathrm{~V}$
ELECTROCHEMISTRY

275937 An acidified solution of $0.1 \mathrm{M} \mathrm{CuSO}_{4}$ is electrolysed using platinum electrodes. What is the reaction that occurs at the anode?

1 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+2}+2 \mathrm{e}$
2 $\mathrm{Cu} \rightarrow \mathrm{Cu}^{+}+\mathrm{e}^{-}$
3 $2 \mathrm{H}_{2} \mathrm{O} \rightarrow+4 \mathrm{H}^{+}+\mathrm{O}_{2} \uparrow+4 \mathrm{e}^{-}$
4 None of the above
ELECTROCHEMISTRY

275866 What pressure of $\mathrm{H}_{2}$ would be required to make emf of the hydrogen electrode zero in pure water at $25^{\circ} \mathrm{C}$ ?

1 $10^{-7} \mathrm{~atm}$
2 $10^{-14} \mathrm{~atm}$
3 $1 \mathrm{~atm}$
4 $0.5 \mathrm{~atm}$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here