The lanthanoids
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CHXII08:THE D- & F-BLOCK ELEMENTS

321738 Diamagnetic lanthanoid ions are

1 \({\mathrm{\mathrm{La}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
2 \({\mathrm{\mathrm{Lu}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
3 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
4 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321739 Which of the following statements related to lanthanoids is incorrect?

1 Lanthanoids are silvery white soft metals.
2 Samarium shows +2 oxidation state
3 \({\mathrm{\mathrm{Ce}^{+4}}}\) solutions are widely used as oxidising agents in titrimetric analysis.
4 Colour of Lanthanoid ion in solution is due to d-d transition .
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321740 Consider the following statements
(I) \(\mathrm{\mathrm{La}(\mathrm{OH})_{3}}\) is the least basic among hydroxides of lanthanides.
(II) \(\mathrm{\mathrm{Zr}^{4+}}\) and \(\mathrm{\mathrm{Hf}^{4+}}\) possess almost the same ionic radii.
(III) \(\mathrm{C e^{4+}}\) can act as an oxidizing agent.
Which of the above is/are true?

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

321741 Lanthanide for which \(+\mathrm{II}\) and \(+\mathrm{III}\) oxidation states are common is

1 \(\mathrm{La}\)
2 \(\mathrm{Nd}\)
3 \(\mathrm{Ce}\)
4 \(\mathrm{Eu}\)
AIIMS - 2013
CHXII08:THE D- & F-BLOCK ELEMENTS

321742 Cerium \(\mathrm{(Z=58)}\) is an important member of the Lanthanoids. Which of the following statements about cerium is incorrect?

1 The +3 oxidation state of cerium is more stable than the +4 oxidation state.
2 The common oxidation states of cerium are +3 and +4
3 Cerium (IV) acts as an oxidising agent
4 The +4 oxidation state of cerium is not known in solutions.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321738 Diamagnetic lanthanoid ions are

1 \({\mathrm{\mathrm{La}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
2 \({\mathrm{\mathrm{Lu}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
3 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
4 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321739 Which of the following statements related to lanthanoids is incorrect?

1 Lanthanoids are silvery white soft metals.
2 Samarium shows +2 oxidation state
3 \({\mathrm{\mathrm{Ce}^{+4}}}\) solutions are widely used as oxidising agents in titrimetric analysis.
4 Colour of Lanthanoid ion in solution is due to d-d transition .
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321740 Consider the following statements
(I) \(\mathrm{\mathrm{La}(\mathrm{OH})_{3}}\) is the least basic among hydroxides of lanthanides.
(II) \(\mathrm{\mathrm{Zr}^{4+}}\) and \(\mathrm{\mathrm{Hf}^{4+}}\) possess almost the same ionic radii.
(III) \(\mathrm{C e^{4+}}\) can act as an oxidizing agent.
Which of the above is/are true?

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

321741 Lanthanide for which \(+\mathrm{II}\) and \(+\mathrm{III}\) oxidation states are common is

1 \(\mathrm{La}\)
2 \(\mathrm{Nd}\)
3 \(\mathrm{Ce}\)
4 \(\mathrm{Eu}\)
AIIMS - 2013
CHXII08:THE D- & F-BLOCK ELEMENTS

321742 Cerium \(\mathrm{(Z=58)}\) is an important member of the Lanthanoids. Which of the following statements about cerium is incorrect?

1 The +3 oxidation state of cerium is more stable than the +4 oxidation state.
2 The common oxidation states of cerium are +3 and +4
3 Cerium (IV) acts as an oxidising agent
4 The +4 oxidation state of cerium is not known in solutions.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321738 Diamagnetic lanthanoid ions are

1 \({\mathrm{\mathrm{La}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
2 \({\mathrm{\mathrm{Lu}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
3 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
4 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321739 Which of the following statements related to lanthanoids is incorrect?

1 Lanthanoids are silvery white soft metals.
2 Samarium shows +2 oxidation state
3 \({\mathrm{\mathrm{Ce}^{+4}}}\) solutions are widely used as oxidising agents in titrimetric analysis.
4 Colour of Lanthanoid ion in solution is due to d-d transition .
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321740 Consider the following statements
(I) \(\mathrm{\mathrm{La}(\mathrm{OH})_{3}}\) is the least basic among hydroxides of lanthanides.
(II) \(\mathrm{\mathrm{Zr}^{4+}}\) and \(\mathrm{\mathrm{Hf}^{4+}}\) possess almost the same ionic radii.
(III) \(\mathrm{C e^{4+}}\) can act as an oxidizing agent.
Which of the above is/are true?

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

321741 Lanthanide for which \(+\mathrm{II}\) and \(+\mathrm{III}\) oxidation states are common is

1 \(\mathrm{La}\)
2 \(\mathrm{Nd}\)
3 \(\mathrm{Ce}\)
4 \(\mathrm{Eu}\)
AIIMS - 2013
CHXII08:THE D- & F-BLOCK ELEMENTS

321742 Cerium \(\mathrm{(Z=58)}\) is an important member of the Lanthanoids. Which of the following statements about cerium is incorrect?

1 The +3 oxidation state of cerium is more stable than the +4 oxidation state.
2 The common oxidation states of cerium are +3 and +4
3 Cerium (IV) acts as an oxidising agent
4 The +4 oxidation state of cerium is not known in solutions.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321738 Diamagnetic lanthanoid ions are

1 \({\mathrm{\mathrm{La}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
2 \({\mathrm{\mathrm{Lu}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
3 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
4 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321739 Which of the following statements related to lanthanoids is incorrect?

1 Lanthanoids are silvery white soft metals.
2 Samarium shows +2 oxidation state
3 \({\mathrm{\mathrm{Ce}^{+4}}}\) solutions are widely used as oxidising agents in titrimetric analysis.
4 Colour of Lanthanoid ion in solution is due to d-d transition .
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321740 Consider the following statements
(I) \(\mathrm{\mathrm{La}(\mathrm{OH})_{3}}\) is the least basic among hydroxides of lanthanides.
(II) \(\mathrm{\mathrm{Zr}^{4+}}\) and \(\mathrm{\mathrm{Hf}^{4+}}\) possess almost the same ionic radii.
(III) \(\mathrm{C e^{4+}}\) can act as an oxidizing agent.
Which of the above is/are true?

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

321741 Lanthanide for which \(+\mathrm{II}\) and \(+\mathrm{III}\) oxidation states are common is

1 \(\mathrm{La}\)
2 \(\mathrm{Nd}\)
3 \(\mathrm{Ce}\)
4 \(\mathrm{Eu}\)
AIIMS - 2013
CHXII08:THE D- & F-BLOCK ELEMENTS

321742 Cerium \(\mathrm{(Z=58)}\) is an important member of the Lanthanoids. Which of the following statements about cerium is incorrect?

1 The +3 oxidation state of cerium is more stable than the +4 oxidation state.
2 The common oxidation states of cerium are +3 and +4
3 Cerium (IV) acts as an oxidising agent
4 The +4 oxidation state of cerium is not known in solutions.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321738 Diamagnetic lanthanoid ions are

1 \({\mathrm{\mathrm{La}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
2 \({\mathrm{\mathrm{Lu}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
3 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Eu}^{3+}}}\)
4 \({\mathrm{\mathrm{Nd}^{3+}}}\) and \({\mathrm{\mathrm{Ce}^{4+}}}\)
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321739 Which of the following statements related to lanthanoids is incorrect?

1 Lanthanoids are silvery white soft metals.
2 Samarium shows +2 oxidation state
3 \({\mathrm{\mathrm{Ce}^{+4}}}\) solutions are widely used as oxidising agents in titrimetric analysis.
4 Colour of Lanthanoid ion in solution is due to d-d transition .
KCET - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS

321740 Consider the following statements
(I) \(\mathrm{\mathrm{La}(\mathrm{OH})_{3}}\) is the least basic among hydroxides of lanthanides.
(II) \(\mathrm{\mathrm{Zr}^{4+}}\) and \(\mathrm{\mathrm{Hf}^{4+}}\) possess almost the same ionic radii.
(III) \(\mathrm{C e^{4+}}\) can act as an oxidizing agent.
Which of the above is/are true?

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

321741 Lanthanide for which \(+\mathrm{II}\) and \(+\mathrm{III}\) oxidation states are common is

1 \(\mathrm{La}\)
2 \(\mathrm{Nd}\)
3 \(\mathrm{Ce}\)
4 \(\mathrm{Eu}\)
AIIMS - 2013
CHXII08:THE D- & F-BLOCK ELEMENTS

321742 Cerium \(\mathrm{(Z=58)}\) is an important member of the Lanthanoids. Which of the following statements about cerium is incorrect?

1 The +3 oxidation state of cerium is more stable than the +4 oxidation state.
2 The common oxidation states of cerium are +3 and +4
3 Cerium (IV) acts as an oxidising agent
4 The +4 oxidation state of cerium is not known in solutions.