General characteristics of the transition elements
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CHXII08:THE D- & F-BLOCK ELEMENTS

321564 The \({\mathrm{\mathrm{E}^{\circ}}}\) value for the \({\mathrm{\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}}}\) couple is more positive than that \({\mathrm{\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}}}\) or \({\mathrm{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}}\) due to change of

1 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{4}}}\) configuration
2 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{2}}}\) configuration
3 \({\mathrm{d^{4}}}\) to \({\mathrm{d^{5}}}\) configuration
4 \({\mathrm{d^{3}}}\) to \({\mathrm{d^{5}}}\) configuration
NEET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321565 Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential \(\mathrm{\left(E_{M^{2+} / M}^{\circ}\right)}\) value has a positive sign?

1 \(\mathrm{\operatorname{Co}(Z=27)}\)
2 \(\mathrm{\mathrm{Ni}(\mathrm{Z}=28)}\)
3 \(\mathrm{\mathrm{Cu}(\mathrm{Z}=29)}\)
4 \(\mathrm{\mathrm{Fe}(\mathrm{Z}=26)}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321566 Reduction potential of \(\mathrm{M^{2+} / M}\) will depend on

1 \(\mathrm{\left(I E_{1}+I E_{2}\right)}\)
2 \(\mathrm{\Delta H_{\text {atomisation }}}\)
3 Hydration energy
4 All of these
CHXII08:THE D- & F-BLOCK ELEMENTS

321567 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
In aqueous solutions \({\mathrm{\mathrm{Cr}^{2+}}}\) is reducing while \({\mathrm{\mathrm{Mn}^{3+}}}\) is oxidising in nature.
Reason :
Extra stability to half filled electronic configuration is observed than incompletely filled electronic configuration.

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.
JEE Main - 2024
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CHXII08:THE D- & F-BLOCK ELEMENTS

321564 The \({\mathrm{\mathrm{E}^{\circ}}}\) value for the \({\mathrm{\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}}}\) couple is more positive than that \({\mathrm{\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}}}\) or \({\mathrm{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}}\) due to change of

1 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{4}}}\) configuration
2 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{2}}}\) configuration
3 \({\mathrm{d^{4}}}\) to \({\mathrm{d^{5}}}\) configuration
4 \({\mathrm{d^{3}}}\) to \({\mathrm{d^{5}}}\) configuration
NEET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321565 Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential \(\mathrm{\left(E_{M^{2+} / M}^{\circ}\right)}\) value has a positive sign?

1 \(\mathrm{\operatorname{Co}(Z=27)}\)
2 \(\mathrm{\mathrm{Ni}(\mathrm{Z}=28)}\)
3 \(\mathrm{\mathrm{Cu}(\mathrm{Z}=29)}\)
4 \(\mathrm{\mathrm{Fe}(\mathrm{Z}=26)}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321566 Reduction potential of \(\mathrm{M^{2+} / M}\) will depend on

1 \(\mathrm{\left(I E_{1}+I E_{2}\right)}\)
2 \(\mathrm{\Delta H_{\text {atomisation }}}\)
3 Hydration energy
4 All of these
CHXII08:THE D- & F-BLOCK ELEMENTS

321567 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
In aqueous solutions \({\mathrm{\mathrm{Cr}^{2+}}}\) is reducing while \({\mathrm{\mathrm{Mn}^{3+}}}\) is oxidising in nature.
Reason :
Extra stability to half filled electronic configuration is observed than incompletely filled electronic configuration.

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.
JEE Main - 2024
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CHXII08:THE D- & F-BLOCK ELEMENTS

321564 The \({\mathrm{\mathrm{E}^{\circ}}}\) value for the \({\mathrm{\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}}}\) couple is more positive than that \({\mathrm{\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}}}\) or \({\mathrm{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}}\) due to change of

1 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{4}}}\) configuration
2 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{2}}}\) configuration
3 \({\mathrm{d^{4}}}\) to \({\mathrm{d^{5}}}\) configuration
4 \({\mathrm{d^{3}}}\) to \({\mathrm{d^{5}}}\) configuration
NEET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321565 Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential \(\mathrm{\left(E_{M^{2+} / M}^{\circ}\right)}\) value has a positive sign?

1 \(\mathrm{\operatorname{Co}(Z=27)}\)
2 \(\mathrm{\mathrm{Ni}(\mathrm{Z}=28)}\)
3 \(\mathrm{\mathrm{Cu}(\mathrm{Z}=29)}\)
4 \(\mathrm{\mathrm{Fe}(\mathrm{Z}=26)}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321566 Reduction potential of \(\mathrm{M^{2+} / M}\) will depend on

1 \(\mathrm{\left(I E_{1}+I E_{2}\right)}\)
2 \(\mathrm{\Delta H_{\text {atomisation }}}\)
3 Hydration energy
4 All of these
CHXII08:THE D- & F-BLOCK ELEMENTS

321567 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
In aqueous solutions \({\mathrm{\mathrm{Cr}^{2+}}}\) is reducing while \({\mathrm{\mathrm{Mn}^{3+}}}\) is oxidising in nature.
Reason :
Extra stability to half filled electronic configuration is observed than incompletely filled electronic configuration.

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.
JEE Main - 2024
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CHXII08:THE D- & F-BLOCK ELEMENTS

321564 The \({\mathrm{\mathrm{E}^{\circ}}}\) value for the \({\mathrm{\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}}}\) couple is more positive than that \({\mathrm{\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}}}\) or \({\mathrm{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}}\) due to change of

1 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{4}}}\) configuration
2 \({\mathrm{d^{5}}}\) to \({\mathrm{d^{2}}}\) configuration
3 \({\mathrm{d^{4}}}\) to \({\mathrm{d^{5}}}\) configuration
4 \({\mathrm{d^{3}}}\) to \({\mathrm{d^{5}}}\) configuration
NEET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321565 Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential \(\mathrm{\left(E_{M^{2+} / M}^{\circ}\right)}\) value has a positive sign?

1 \(\mathrm{\operatorname{Co}(Z=27)}\)
2 \(\mathrm{\mathrm{Ni}(\mathrm{Z}=28)}\)
3 \(\mathrm{\mathrm{Cu}(\mathrm{Z}=29)}\)
4 \(\mathrm{\mathrm{Fe}(\mathrm{Z}=26)}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321566 Reduction potential of \(\mathrm{M^{2+} / M}\) will depend on

1 \(\mathrm{\left(I E_{1}+I E_{2}\right)}\)
2 \(\mathrm{\Delta H_{\text {atomisation }}}\)
3 Hydration energy
4 All of these
CHXII08:THE D- & F-BLOCK ELEMENTS

321567 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
In aqueous solutions \({\mathrm{\mathrm{Cr}^{2+}}}\) is reducing while \({\mathrm{\mathrm{Mn}^{3+}}}\) is oxidising in nature.
Reason :
Extra stability to half filled electronic configuration is observed than incompletely filled electronic configuration.

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.
JEE Main - 2024
For More Updates join with Us
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