00. Electrode Potential
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
ELECTROCHEMISTRY

275894 Which one of the following has a potential more than zero?

1 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(2 \mathrm{M})$
2 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.1 \mathrm{M})$
3 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.5 \mathrm{M})$
4 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(1 \mathrm{M})$
ELECTROCHEMISTRY

275896 For the disproportionation of copper
$2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}, \mathrm{E}^{0}$ is (Given : $\mathrm{E}^{0}$ for $\mathrm{Cu}^{2+} /$
$\mathrm{Cu}$ is 0.34 and $\mathrm{E}^{0} \mathrm{~V}$ for $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$is $0.15 \mathrm{~V}$ )

1 $0.49 \mathrm{~V}$
2 $-0.19 \mathrm{~V}$
3 $0.38 \mathrm{~V}$
4 $-0.38 \mathrm{~V}$
ELECTROCHEMISTRY

275897 Standard reduction potentials of the half reactions are given below:
$\mathrm{F}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{~F}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+2.85 \mathrm{~V}$
$\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cl}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.36 \mathrm{~V}$
$\mathrm{Br}_{2}(\mathrm{l})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Br}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.06 \mathrm{~V}$
$\mathrm{I}_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{I}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+0.53 \mathrm{~V}$
The strongest oxidising and reducing agents respectively are

1 $\mathrm{F}_{2}$ and $\mathrm{I}^{-}$
2 $\mathrm{Br}_{2}$ and $\mathrm{Cl}^{-}$
3 $\mathrm{Cl}_{2}$ and $\mathrm{Br}$
4 $\mathrm{Cl}_{2}$ and $\mathrm{I}_{2}$
ELECTROCHEMISTRY

275899 The emf (in $V$ ) of a Daniell cell containing $0.1 \mathrm{M} \mathrm{ZnSO}_{4}$ and $0.01 \mathrm{M} \mathrm{CuSO}_{4}$ solutions their respective electrodes is
$\left(\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{0}=+\mathbf{0 . 3 4} \mathrm{V} ; \mathbf{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-\mathbf{0 . 7 6 ~ V}\right)$

1 1.10
2 1.16
3 1.13
4 1.07
ELECTROCHEMISTRY

275894 Which one of the following has a potential more than zero?

1 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(2 \mathrm{M})$
2 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.1 \mathrm{M})$
3 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.5 \mathrm{M})$
4 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(1 \mathrm{M})$
ELECTROCHEMISTRY

275896 For the disproportionation of copper
$2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}, \mathrm{E}^{0}$ is (Given : $\mathrm{E}^{0}$ for $\mathrm{Cu}^{2+} /$
$\mathrm{Cu}$ is 0.34 and $\mathrm{E}^{0} \mathrm{~V}$ for $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$is $0.15 \mathrm{~V}$ )

1 $0.49 \mathrm{~V}$
2 $-0.19 \mathrm{~V}$
3 $0.38 \mathrm{~V}$
4 $-0.38 \mathrm{~V}$
ELECTROCHEMISTRY

275897 Standard reduction potentials of the half reactions are given below:
$\mathrm{F}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{~F}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+2.85 \mathrm{~V}$
$\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cl}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.36 \mathrm{~V}$
$\mathrm{Br}_{2}(\mathrm{l})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Br}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.06 \mathrm{~V}$
$\mathrm{I}_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{I}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+0.53 \mathrm{~V}$
The strongest oxidising and reducing agents respectively are

1 $\mathrm{F}_{2}$ and $\mathrm{I}^{-}$
2 $\mathrm{Br}_{2}$ and $\mathrm{Cl}^{-}$
3 $\mathrm{Cl}_{2}$ and $\mathrm{Br}$
4 $\mathrm{Cl}_{2}$ and $\mathrm{I}_{2}$
ELECTROCHEMISTRY

275899 The emf (in $V$ ) of a Daniell cell containing $0.1 \mathrm{M} \mathrm{ZnSO}_{4}$ and $0.01 \mathrm{M} \mathrm{CuSO}_{4}$ solutions their respective electrodes is
$\left(\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{0}=+\mathbf{0 . 3 4} \mathrm{V} ; \mathbf{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-\mathbf{0 . 7 6 ~ V}\right)$

1 1.10
2 1.16
3 1.13
4 1.07
ELECTROCHEMISTRY

275894 Which one of the following has a potential more than zero?

1 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(2 \mathrm{M})$
2 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.1 \mathrm{M})$
3 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.5 \mathrm{M})$
4 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(1 \mathrm{M})$
ELECTROCHEMISTRY

275896 For the disproportionation of copper
$2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}, \mathrm{E}^{0}$ is (Given : $\mathrm{E}^{0}$ for $\mathrm{Cu}^{2+} /$
$\mathrm{Cu}$ is 0.34 and $\mathrm{E}^{0} \mathrm{~V}$ for $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$is $0.15 \mathrm{~V}$ )

1 $0.49 \mathrm{~V}$
2 $-0.19 \mathrm{~V}$
3 $0.38 \mathrm{~V}$
4 $-0.38 \mathrm{~V}$
ELECTROCHEMISTRY

275897 Standard reduction potentials of the half reactions are given below:
$\mathrm{F}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{~F}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+2.85 \mathrm{~V}$
$\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cl}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.36 \mathrm{~V}$
$\mathrm{Br}_{2}(\mathrm{l})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Br}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.06 \mathrm{~V}$
$\mathrm{I}_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{I}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+0.53 \mathrm{~V}$
The strongest oxidising and reducing agents respectively are

1 $\mathrm{F}_{2}$ and $\mathrm{I}^{-}$
2 $\mathrm{Br}_{2}$ and $\mathrm{Cl}^{-}$
3 $\mathrm{Cl}_{2}$ and $\mathrm{Br}$
4 $\mathrm{Cl}_{2}$ and $\mathrm{I}_{2}$
ELECTROCHEMISTRY

275899 The emf (in $V$ ) of a Daniell cell containing $0.1 \mathrm{M} \mathrm{ZnSO}_{4}$ and $0.01 \mathrm{M} \mathrm{CuSO}_{4}$ solutions their respective electrodes is
$\left(\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{0}=+\mathbf{0 . 3 4} \mathrm{V} ; \mathbf{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-\mathbf{0 . 7 6 ~ V}\right)$

1 1.10
2 1.16
3 1.13
4 1.07
ELECTROCHEMISTRY

275894 Which one of the following has a potential more than zero?

1 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(2 \mathrm{M})$
2 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.1 \mathrm{M})$
3 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(0.5 \mathrm{M})$
4 $\mathrm{Pt}, \frac{1}{2} \mathrm{H}_{2}(1 \mathrm{~atm}) \mid \mathrm{HCl}(1 \mathrm{M})$
ELECTROCHEMISTRY

275896 For the disproportionation of copper
$2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}, \mathrm{E}^{0}$ is (Given : $\mathrm{E}^{0}$ for $\mathrm{Cu}^{2+} /$
$\mathrm{Cu}$ is 0.34 and $\mathrm{E}^{0} \mathrm{~V}$ for $\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}$is $0.15 \mathrm{~V}$ )

1 $0.49 \mathrm{~V}$
2 $-0.19 \mathrm{~V}$
3 $0.38 \mathrm{~V}$
4 $-0.38 \mathrm{~V}$
ELECTROCHEMISTRY

275897 Standard reduction potentials of the half reactions are given below:
$\mathrm{F}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{~F}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+2.85 \mathrm{~V}$
$\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cl}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.36 \mathrm{~V}$
$\mathrm{Br}_{2}(\mathrm{l})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Br}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+1.06 \mathrm{~V}$
$\mathrm{I}_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{I}^{-}(\mathrm{aq}) ; \mathrm{E}^{0}=+0.53 \mathrm{~V}$
The strongest oxidising and reducing agents respectively are

1 $\mathrm{F}_{2}$ and $\mathrm{I}^{-}$
2 $\mathrm{Br}_{2}$ and $\mathrm{Cl}^{-}$
3 $\mathrm{Cl}_{2}$ and $\mathrm{Br}$
4 $\mathrm{Cl}_{2}$ and $\mathrm{I}_{2}$
ELECTROCHEMISTRY

275899 The emf (in $V$ ) of a Daniell cell containing $0.1 \mathrm{M} \mathrm{ZnSO}_{4}$ and $0.01 \mathrm{M} \mathrm{CuSO}_{4}$ solutions their respective electrodes is
$\left(\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{0}=+\mathbf{0 . 3 4} \mathrm{V} ; \mathbf{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-\mathbf{0 . 7 6 ~ V}\right)$

1 1.10
2 1.16
3 1.13
4 1.07