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

321568 Which of the following statements are correct?
(A) The \(\mathrm{M}^{3+} / \mathrm{M}^{2+}\) reduction potential for iron is greater than manganese.
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solution of \(\mathrm{Cr}^{2+}\) can liberate hydrogen from dilute acid.
(D) Magnetic moment of \(\mathrm{V}^{2+}\) is observed between 4.4 - 5.2 B.M.
Choose the correct answer from the options given below:

1 (A), (B), (D) only
2 (A), (B) only
3 (C), (D) only
4 (B), (C) only
JEE - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS

321569 The \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{2+} / \mathrm{M}\right)}\) value for copper is positive \(\mathrm{(+0.34 \mathrm{~V})}\). What is possible reason for this?

1 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and high \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
2 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
3 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
4 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and High \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321570 Assertion :
Reduction potential of \({\text{Mn( - 3}}\,\,{\text{to 2)}}\) is more positive than \({\text{Fe( + 3}}\,\,{\text{to + 2)}}{\text{.}}\)
Reason :
Ionisation potential of \(\mathrm{Mn}\) is more than that of \(\mathrm{Fe}\).

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.
CHXII08:THE D- & F-BLOCK ELEMENTS

321571 The electronic configuration of \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is \({\mathrm{3 \mathrm{~d}^{9}}}\) whereas that of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) is \({\mathrm{3 \mathrm{~d}^{10}}}\). Which of the following is correct?

1 Cu (II) is more stable.
2 Stability of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(}}\) II \({\mathrm{)}}\) depends on nature of copper salts.
3 \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is less stable.
4 \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) are equally stable.
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321572 Assertion :
\(\mathrm{\mathrm{Cu}^{2+}}\) is the only ion \(\mathrm{\left(\mathrm{M}^{2+}\right)}\) which has positive \(\mathrm{E_{r e d}^{o}\left(M^{2+} / M\right)}\) in \({\rm{3d}}\) series.
Reason :
\(\mathrm{\mathrm{Cu}}\) has lower hydration enthalpy as comparision to its I.E. and \(\mathrm{\Delta H_{\text {atomisation }}}\).

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.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321568 Which of the following statements are correct?
(A) The \(\mathrm{M}^{3+} / \mathrm{M}^{2+}\) reduction potential for iron is greater than manganese.
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solution of \(\mathrm{Cr}^{2+}\) can liberate hydrogen from dilute acid.
(D) Magnetic moment of \(\mathrm{V}^{2+}\) is observed between 4.4 - 5.2 B.M.
Choose the correct answer from the options given below:

1 (A), (B), (D) only
2 (A), (B) only
3 (C), (D) only
4 (B), (C) only
JEE - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS

321569 The \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{2+} / \mathrm{M}\right)}\) value for copper is positive \(\mathrm{(+0.34 \mathrm{~V})}\). What is possible reason for this?

1 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and high \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
2 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
3 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
4 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and High \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321570 Assertion :
Reduction potential of \({\text{Mn( - 3}}\,\,{\text{to 2)}}\) is more positive than \({\text{Fe( + 3}}\,\,{\text{to + 2)}}{\text{.}}\)
Reason :
Ionisation potential of \(\mathrm{Mn}\) is more than that of \(\mathrm{Fe}\).

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.
CHXII08:THE D- & F-BLOCK ELEMENTS

321571 The electronic configuration of \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is \({\mathrm{3 \mathrm{~d}^{9}}}\) whereas that of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) is \({\mathrm{3 \mathrm{~d}^{10}}}\). Which of the following is correct?

1 Cu (II) is more stable.
2 Stability of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(}}\) II \({\mathrm{)}}\) depends on nature of copper salts.
3 \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is less stable.
4 \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) are equally stable.
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321572 Assertion :
\(\mathrm{\mathrm{Cu}^{2+}}\) is the only ion \(\mathrm{\left(\mathrm{M}^{2+}\right)}\) which has positive \(\mathrm{E_{r e d}^{o}\left(M^{2+} / M\right)}\) in \({\rm{3d}}\) series.
Reason :
\(\mathrm{\mathrm{Cu}}\) has lower hydration enthalpy as comparision to its I.E. and \(\mathrm{\Delta H_{\text {atomisation }}}\).

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.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321568 Which of the following statements are correct?
(A) The \(\mathrm{M}^{3+} / \mathrm{M}^{2+}\) reduction potential for iron is greater than manganese.
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solution of \(\mathrm{Cr}^{2+}\) can liberate hydrogen from dilute acid.
(D) Magnetic moment of \(\mathrm{V}^{2+}\) is observed between 4.4 - 5.2 B.M.
Choose the correct answer from the options given below:

1 (A), (B), (D) only
2 (A), (B) only
3 (C), (D) only
4 (B), (C) only
JEE - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS

321569 The \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{2+} / \mathrm{M}\right)}\) value for copper is positive \(\mathrm{(+0.34 \mathrm{~V})}\). What is possible reason for this?

1 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and high \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
2 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
3 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
4 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and High \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321570 Assertion :
Reduction potential of \({\text{Mn( - 3}}\,\,{\text{to 2)}}\) is more positive than \({\text{Fe( + 3}}\,\,{\text{to + 2)}}{\text{.}}\)
Reason :
Ionisation potential of \(\mathrm{Mn}\) is more than that of \(\mathrm{Fe}\).

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.
CHXII08:THE D- & F-BLOCK ELEMENTS

321571 The electronic configuration of \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is \({\mathrm{3 \mathrm{~d}^{9}}}\) whereas that of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) is \({\mathrm{3 \mathrm{~d}^{10}}}\). Which of the following is correct?

1 Cu (II) is more stable.
2 Stability of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(}}\) II \({\mathrm{)}}\) depends on nature of copper salts.
3 \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is less stable.
4 \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) are equally stable.
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321572 Assertion :
\(\mathrm{\mathrm{Cu}^{2+}}\) is the only ion \(\mathrm{\left(\mathrm{M}^{2+}\right)}\) which has positive \(\mathrm{E_{r e d}^{o}\left(M^{2+} / M\right)}\) in \({\rm{3d}}\) series.
Reason :
\(\mathrm{\mathrm{Cu}}\) has lower hydration enthalpy as comparision to its I.E. and \(\mathrm{\Delta H_{\text {atomisation }}}\).

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.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321568 Which of the following statements are correct?
(A) The \(\mathrm{M}^{3+} / \mathrm{M}^{2+}\) reduction potential for iron is greater than manganese.
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solution of \(\mathrm{Cr}^{2+}\) can liberate hydrogen from dilute acid.
(D) Magnetic moment of \(\mathrm{V}^{2+}\) is observed between 4.4 - 5.2 B.M.
Choose the correct answer from the options given below:

1 (A), (B), (D) only
2 (A), (B) only
3 (C), (D) only
4 (B), (C) only
JEE - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS

321569 The \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{2+} / \mathrm{M}\right)}\) value for copper is positive \(\mathrm{(+0.34 \mathrm{~V})}\). What is possible reason for this?

1 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and high \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
2 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
3 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
4 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and High \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321570 Assertion :
Reduction potential of \({\text{Mn( - 3}}\,\,{\text{to 2)}}\) is more positive than \({\text{Fe( + 3}}\,\,{\text{to + 2)}}{\text{.}}\)
Reason :
Ionisation potential of \(\mathrm{Mn}\) is more than that of \(\mathrm{Fe}\).

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.
CHXII08:THE D- & F-BLOCK ELEMENTS

321571 The electronic configuration of \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is \({\mathrm{3 \mathrm{~d}^{9}}}\) whereas that of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) is \({\mathrm{3 \mathrm{~d}^{10}}}\). Which of the following is correct?

1 Cu (II) is more stable.
2 Stability of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(}}\) II \({\mathrm{)}}\) depends on nature of copper salts.
3 \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is less stable.
4 \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) are equally stable.
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321572 Assertion :
\(\mathrm{\mathrm{Cu}^{2+}}\) is the only ion \(\mathrm{\left(\mathrm{M}^{2+}\right)}\) which has positive \(\mathrm{E_{r e d}^{o}\left(M^{2+} / M\right)}\) in \({\rm{3d}}\) series.
Reason :
\(\mathrm{\mathrm{Cu}}\) has lower hydration enthalpy as comparision to its I.E. and \(\mathrm{\Delta H_{\text {atomisation }}}\).

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.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321568 Which of the following statements are correct?
(A) The \(\mathrm{M}^{3+} / \mathrm{M}^{2+}\) reduction potential for iron is greater than manganese.
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solution of \(\mathrm{Cr}^{2+}\) can liberate hydrogen from dilute acid.
(D) Magnetic moment of \(\mathrm{V}^{2+}\) is observed between 4.4 - 5.2 B.M.
Choose the correct answer from the options given below:

1 (A), (B), (D) only
2 (A), (B) only
3 (C), (D) only
4 (B), (C) only
JEE - 2023
CHXII08:THE D- & F-BLOCK ELEMENTS

321569 The \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{2+} / \mathrm{M}\right)}\) value for copper is positive \(\mathrm{(+0.34 \mathrm{~V})}\). What is possible reason for this?

1 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and high \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
2 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
3 Low \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and Low \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
4 High \(\mathrm{\Delta_{a} \mathrm{H}^{\circ}}\) and High \(\mathrm{\Delta_{\text {hyd }} \mathrm{H}^{\circ}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321570 Assertion :
Reduction potential of \({\text{Mn( - 3}}\,\,{\text{to 2)}}\) is more positive than \({\text{Fe( + 3}}\,\,{\text{to + 2)}}{\text{.}}\)
Reason :
Ionisation potential of \(\mathrm{Mn}\) is more than that of \(\mathrm{Fe}\).

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.
CHXII08:THE D- & F-BLOCK ELEMENTS

321571 The electronic configuration of \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is \({\mathrm{3 \mathrm{~d}^{9}}}\) whereas that of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) is \({\mathrm{3 \mathrm{~d}^{10}}}\). Which of the following is correct?

1 Cu (II) is more stable.
2 Stability of \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(}}\) II \({\mathrm{)}}\) depends on nature of copper salts.
3 \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) is less stable.
4 \({\mathrm{\mathrm{Cu}(\mathrm{I})}}\) and \({\mathrm{\mathrm{Cu}(\mathrm{II})}}\) are equally stable.
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321572 Assertion :
\(\mathrm{\mathrm{Cu}^{2+}}\) is the only ion \(\mathrm{\left(\mathrm{M}^{2+}\right)}\) which has positive \(\mathrm{E_{r e d}^{o}\left(M^{2+} / M\right)}\) in \({\rm{3d}}\) series.
Reason :
\(\mathrm{\mathrm{Cu}}\) has lower hydration enthalpy as comparision to its I.E. and \(\mathrm{\Delta H_{\text {atomisation }}}\).

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.