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

321560 Assertion :
Zinc is used in the galvanisation of iron
Reason :
Its coating on iron articles increases their life by protecting them from rusting.

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

321561 \({\text{E}}^\circ \) values for the couples \({\text{C}}{{\text{r}}^{{\text{3 + }}}}{\text{/C}}{{\text{r}}^{{\text{2 + }}}}{\text{ & M}}{{\text{n}}^{{\text{3 + }}}}{\text{/M}}{{\text{n}}^{{\text{2 + }}}}\) are \({\text{ - 0}}{\text{.41 & + 1}}{\text{.51V}}\) respectively. Considering these values select the correct option:

1 \(\mathrm{Cr}^{2+}\) acts as a reducing agent and \(\mathrm{Mn}^{3+}\) acts as an oxidising agent in their aqueous solutions.
2 \(\mathrm{Cr}^{2+}{ }_{\text {(aq) }}\) is more stable than \(\mathrm{Cr}^{3+}{ }_{\text {(aq) }}\).
3 \({\text{Mn}}_{(aq)}^{3 + }\) is more stable than \({\text{M}}{{\text{n}}^{2 + }}_{{\text{(aq) }}}\)
4 None of these.
CHXII08:THE D- & F-BLOCK ELEMENTS

321562 Read the Statement -A and Statement -B carefully to mark the correct options given below:
Statement A :
\(\mathrm{E}^{\circ}\) for \(\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}\) is more positive than \(\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}\)
Statement B :
The third ionization energy of Mn is larger than that of Cr .

1 Both statements are correct
2 Both statements are incorrect
3 Statement A is correct but statement B is incorrect
4 Statement A is incorrect but statement B is correct
CHXII08:THE D- & F-BLOCK ELEMENTS

321563 Consider the following statements,
I. Sc has a low value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
II. \(\mathrm{\mathrm{Zn}}\) has the highest value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
III. Mn and Fe have comparatively high and low values respectively.
The correct set of statements is (choose the appropriate option)

1 I and II
2 II and III
3 I and III
4 I, II and III
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CHXII08:THE D- & F-BLOCK ELEMENTS

321560 Assertion :
Zinc is used in the galvanisation of iron
Reason :
Its coating on iron articles increases their life by protecting them from rusting.

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

321561 \({\text{E}}^\circ \) values for the couples \({\text{C}}{{\text{r}}^{{\text{3 + }}}}{\text{/C}}{{\text{r}}^{{\text{2 + }}}}{\text{ & M}}{{\text{n}}^{{\text{3 + }}}}{\text{/M}}{{\text{n}}^{{\text{2 + }}}}\) are \({\text{ - 0}}{\text{.41 & + 1}}{\text{.51V}}\) respectively. Considering these values select the correct option:

1 \(\mathrm{Cr}^{2+}\) acts as a reducing agent and \(\mathrm{Mn}^{3+}\) acts as an oxidising agent in their aqueous solutions.
2 \(\mathrm{Cr}^{2+}{ }_{\text {(aq) }}\) is more stable than \(\mathrm{Cr}^{3+}{ }_{\text {(aq) }}\).
3 \({\text{Mn}}_{(aq)}^{3 + }\) is more stable than \({\text{M}}{{\text{n}}^{2 + }}_{{\text{(aq) }}}\)
4 None of these.
CHXII08:THE D- & F-BLOCK ELEMENTS

321562 Read the Statement -A and Statement -B carefully to mark the correct options given below:
Statement A :
\(\mathrm{E}^{\circ}\) for \(\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}\) is more positive than \(\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}\)
Statement B :
The third ionization energy of Mn is larger than that of Cr .

1 Both statements are correct
2 Both statements are incorrect
3 Statement A is correct but statement B is incorrect
4 Statement A is incorrect but statement B is correct
CHXII08:THE D- & F-BLOCK ELEMENTS

321563 Consider the following statements,
I. Sc has a low value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
II. \(\mathrm{\mathrm{Zn}}\) has the highest value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
III. Mn and Fe have comparatively high and low values respectively.
The correct set of statements is (choose the appropriate option)

1 I and II
2 II and III
3 I and III
4 I, II and III
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CHXII08:THE D- & F-BLOCK ELEMENTS

321560 Assertion :
Zinc is used in the galvanisation of iron
Reason :
Its coating on iron articles increases their life by protecting them from rusting.

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

321561 \({\text{E}}^\circ \) values for the couples \({\text{C}}{{\text{r}}^{{\text{3 + }}}}{\text{/C}}{{\text{r}}^{{\text{2 + }}}}{\text{ & M}}{{\text{n}}^{{\text{3 + }}}}{\text{/M}}{{\text{n}}^{{\text{2 + }}}}\) are \({\text{ - 0}}{\text{.41 & + 1}}{\text{.51V}}\) respectively. Considering these values select the correct option:

1 \(\mathrm{Cr}^{2+}\) acts as a reducing agent and \(\mathrm{Mn}^{3+}\) acts as an oxidising agent in their aqueous solutions.
2 \(\mathrm{Cr}^{2+}{ }_{\text {(aq) }}\) is more stable than \(\mathrm{Cr}^{3+}{ }_{\text {(aq) }}\).
3 \({\text{Mn}}_{(aq)}^{3 + }\) is more stable than \({\text{M}}{{\text{n}}^{2 + }}_{{\text{(aq) }}}\)
4 None of these.
CHXII08:THE D- & F-BLOCK ELEMENTS

321562 Read the Statement -A and Statement -B carefully to mark the correct options given below:
Statement A :
\(\mathrm{E}^{\circ}\) for \(\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}\) is more positive than \(\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}\)
Statement B :
The third ionization energy of Mn is larger than that of Cr .

1 Both statements are correct
2 Both statements are incorrect
3 Statement A is correct but statement B is incorrect
4 Statement A is incorrect but statement B is correct
CHXII08:THE D- & F-BLOCK ELEMENTS

321563 Consider the following statements,
I. Sc has a low value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
II. \(\mathrm{\mathrm{Zn}}\) has the highest value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
III. Mn and Fe have comparatively high and low values respectively.
The correct set of statements is (choose the appropriate option)

1 I and II
2 II and III
3 I and III
4 I, II and III
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CHXII08:THE D- & F-BLOCK ELEMENTS

321560 Assertion :
Zinc is used in the galvanisation of iron
Reason :
Its coating on iron articles increases their life by protecting them from rusting.

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

321561 \({\text{E}}^\circ \) values for the couples \({\text{C}}{{\text{r}}^{{\text{3 + }}}}{\text{/C}}{{\text{r}}^{{\text{2 + }}}}{\text{ & M}}{{\text{n}}^{{\text{3 + }}}}{\text{/M}}{{\text{n}}^{{\text{2 + }}}}\) are \({\text{ - 0}}{\text{.41 & + 1}}{\text{.51V}}\) respectively. Considering these values select the correct option:

1 \(\mathrm{Cr}^{2+}\) acts as a reducing agent and \(\mathrm{Mn}^{3+}\) acts as an oxidising agent in their aqueous solutions.
2 \(\mathrm{Cr}^{2+}{ }_{\text {(aq) }}\) is more stable than \(\mathrm{Cr}^{3+}{ }_{\text {(aq) }}\).
3 \({\text{Mn}}_{(aq)}^{3 + }\) is more stable than \({\text{M}}{{\text{n}}^{2 + }}_{{\text{(aq) }}}\)
4 None of these.
CHXII08:THE D- & F-BLOCK ELEMENTS

321562 Read the Statement -A and Statement -B carefully to mark the correct options given below:
Statement A :
\(\mathrm{E}^{\circ}\) for \(\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}\) is more positive than \(\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}\)
Statement B :
The third ionization energy of Mn is larger than that of Cr .

1 Both statements are correct
2 Both statements are incorrect
3 Statement A is correct but statement B is incorrect
4 Statement A is incorrect but statement B is correct
CHXII08:THE D- & F-BLOCK ELEMENTS

321563 Consider the following statements,
I. Sc has a low value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
II. \(\mathrm{\mathrm{Zn}}\) has the highest value of \(\mathrm{\mathrm{E}^{\circ}\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)}\).
III. Mn and Fe have comparatively high and low values respectively.
The correct set of statements is (choose the appropriate option)

1 I and II
2 II and III
3 I and III
4 I, II and III
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