Redox Reactions and Electrode Processes
CHXI08:REDOX REACTIONS

315416 Assertion :
Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell.
Reason :
In the representation \(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{\Theta}}\) and \(\mathrm{E_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\Theta}, \mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}\) and \(\mathrm{\mathrm{Cu}^{2+} / \mathrm{Cu}}\) are redox couples.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXI08:REDOX REACTIONS

315417 Addition of zinc powder to \(\mathrm{\mathrm{CuSO}_{4}}\) solution precipitates copper due to

1 Reduction of \(\mathrm{\mathrm{Cu}^{2+}}\)
2 Reduction of \(\mathrm{\mathrm{SO}_{4}^{2-}}\)
3 Reduction of \(\mathrm{\mathrm{Zn}}\)
4 Hydrolysis of \(\mathrm{\mathrm{CuSO}_{4}}\)
CHXI08:REDOX REACTIONS

315418 \(\mathrm{E^{\circ}}\) for \(\mathrm{F_{2}+2 e \rightarrow 2 F^{-}}\)is \(\mathrm{2.8 \mathrm{~V}, E^{\circ}}\) for \(\mathrm{\dfrac{1}{2} F_{2}+e \rightarrow F^{-}}\)is

1 \(\mathrm{-1.4 \mathrm{~V}}\)
2 \(\mathrm{-2.8 \mathrm{~V}}\)
3 \(\mathrm{2.8 \mathrm{~V}}\)
4 \(\mathrm{1.4 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315419 Consider the following \(\mathrm{E^{\circ}}\) values:
\(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{o}=+0.77 \mathrm{~V}}\)
\(\mathrm{E_{S n^{2+} / S n}^{o}=-0.14 V}\)
Under standard conditions the potential for the reaction
\(\rm{\mathrm{Sn}(s)+2 \mathrm{Fe}^{3+}(a q) \rightarrow 2 \mathrm{Fe}^{2+}(s q)+\mathrm{Sn}^{2+}(a q) \text { is }}\)

1 \(\mathrm{0.91 \mathrm{~V}}\)
2 \(\mathrm{0.63 \mathrm{~V}}\)
3 \(\mathrm{1.40 \mathrm{~V}}\)
4 \(\mathrm{1.68 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315416 Assertion :
Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell.
Reason :
In the representation \(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{\Theta}}\) and \(\mathrm{E_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\Theta}, \mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}\) and \(\mathrm{\mathrm{Cu}^{2+} / \mathrm{Cu}}\) are redox couples.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXI08:REDOX REACTIONS

315417 Addition of zinc powder to \(\mathrm{\mathrm{CuSO}_{4}}\) solution precipitates copper due to

1 Reduction of \(\mathrm{\mathrm{Cu}^{2+}}\)
2 Reduction of \(\mathrm{\mathrm{SO}_{4}^{2-}}\)
3 Reduction of \(\mathrm{\mathrm{Zn}}\)
4 Hydrolysis of \(\mathrm{\mathrm{CuSO}_{4}}\)
CHXI08:REDOX REACTIONS

315418 \(\mathrm{E^{\circ}}\) for \(\mathrm{F_{2}+2 e \rightarrow 2 F^{-}}\)is \(\mathrm{2.8 \mathrm{~V}, E^{\circ}}\) for \(\mathrm{\dfrac{1}{2} F_{2}+e \rightarrow F^{-}}\)is

1 \(\mathrm{-1.4 \mathrm{~V}}\)
2 \(\mathrm{-2.8 \mathrm{~V}}\)
3 \(\mathrm{2.8 \mathrm{~V}}\)
4 \(\mathrm{1.4 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315419 Consider the following \(\mathrm{E^{\circ}}\) values:
\(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{o}=+0.77 \mathrm{~V}}\)
\(\mathrm{E_{S n^{2+} / S n}^{o}=-0.14 V}\)
Under standard conditions the potential for the reaction
\(\rm{\mathrm{Sn}(s)+2 \mathrm{Fe}^{3+}(a q) \rightarrow 2 \mathrm{Fe}^{2+}(s q)+\mathrm{Sn}^{2+}(a q) \text { is }}\)

1 \(\mathrm{0.91 \mathrm{~V}}\)
2 \(\mathrm{0.63 \mathrm{~V}}\)
3 \(\mathrm{1.40 \mathrm{~V}}\)
4 \(\mathrm{1.68 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315416 Assertion :
Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell.
Reason :
In the representation \(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{\Theta}}\) and \(\mathrm{E_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\Theta}, \mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}\) and \(\mathrm{\mathrm{Cu}^{2+} / \mathrm{Cu}}\) are redox couples.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXI08:REDOX REACTIONS

315417 Addition of zinc powder to \(\mathrm{\mathrm{CuSO}_{4}}\) solution precipitates copper due to

1 Reduction of \(\mathrm{\mathrm{Cu}^{2+}}\)
2 Reduction of \(\mathrm{\mathrm{SO}_{4}^{2-}}\)
3 Reduction of \(\mathrm{\mathrm{Zn}}\)
4 Hydrolysis of \(\mathrm{\mathrm{CuSO}_{4}}\)
CHXI08:REDOX REACTIONS

315418 \(\mathrm{E^{\circ}}\) for \(\mathrm{F_{2}+2 e \rightarrow 2 F^{-}}\)is \(\mathrm{2.8 \mathrm{~V}, E^{\circ}}\) for \(\mathrm{\dfrac{1}{2} F_{2}+e \rightarrow F^{-}}\)is

1 \(\mathrm{-1.4 \mathrm{~V}}\)
2 \(\mathrm{-2.8 \mathrm{~V}}\)
3 \(\mathrm{2.8 \mathrm{~V}}\)
4 \(\mathrm{1.4 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315419 Consider the following \(\mathrm{E^{\circ}}\) values:
\(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{o}=+0.77 \mathrm{~V}}\)
\(\mathrm{E_{S n^{2+} / S n}^{o}=-0.14 V}\)
Under standard conditions the potential for the reaction
\(\rm{\mathrm{Sn}(s)+2 \mathrm{Fe}^{3+}(a q) \rightarrow 2 \mathrm{Fe}^{2+}(s q)+\mathrm{Sn}^{2+}(a q) \text { is }}\)

1 \(\mathrm{0.91 \mathrm{~V}}\)
2 \(\mathrm{0.63 \mathrm{~V}}\)
3 \(\mathrm{1.40 \mathrm{~V}}\)
4 \(\mathrm{1.68 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315416 Assertion :
Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell.
Reason :
In the representation \(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{\Theta}}\) and \(\mathrm{E_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\Theta}, \mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}\) and \(\mathrm{\mathrm{Cu}^{2+} / \mathrm{Cu}}\) are redox couples.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXI08:REDOX REACTIONS

315417 Addition of zinc powder to \(\mathrm{\mathrm{CuSO}_{4}}\) solution precipitates copper due to

1 Reduction of \(\mathrm{\mathrm{Cu}^{2+}}\)
2 Reduction of \(\mathrm{\mathrm{SO}_{4}^{2-}}\)
3 Reduction of \(\mathrm{\mathrm{Zn}}\)
4 Hydrolysis of \(\mathrm{\mathrm{CuSO}_{4}}\)
CHXI08:REDOX REACTIONS

315418 \(\mathrm{E^{\circ}}\) for \(\mathrm{F_{2}+2 e \rightarrow 2 F^{-}}\)is \(\mathrm{2.8 \mathrm{~V}, E^{\circ}}\) for \(\mathrm{\dfrac{1}{2} F_{2}+e \rightarrow F^{-}}\)is

1 \(\mathrm{-1.4 \mathrm{~V}}\)
2 \(\mathrm{-2.8 \mathrm{~V}}\)
3 \(\mathrm{2.8 \mathrm{~V}}\)
4 \(\mathrm{1.4 \mathrm{~V}}\)
CHXI08:REDOX REACTIONS

315419 Consider the following \(\mathrm{E^{\circ}}\) values:
\(\mathrm{E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{o}=+0.77 \mathrm{~V}}\)
\(\mathrm{E_{S n^{2+} / S n}^{o}=-0.14 V}\)
Under standard conditions the potential for the reaction
\(\rm{\mathrm{Sn}(s)+2 \mathrm{Fe}^{3+}(a q) \rightarrow 2 \mathrm{Fe}^{2+}(s q)+\mathrm{Sn}^{2+}(a q) \text { is }}\)

1 \(\mathrm{0.91 \mathrm{~V}}\)
2 \(\mathrm{0.63 \mathrm{~V}}\)
3 \(\mathrm{1.40 \mathrm{~V}}\)
4 \(\mathrm{1.68 \mathrm{~V}}\)
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