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

321696 Across the lanthanide series, the basicity of the lanthanide hydroxides

1 increases
2 decreases
3 first increases and then decreases
4 first decreases and then increases.
CHXII08:THE D- & F-BLOCK ELEMENTS

321697 What are the formulae of the compounds formed when lanthanoids \((\mathrm{Ln})\) react with nitrogen and halogen respectively?

1 \(\mathrm{LnN}\) and \(\mathrm{LnX}_{3}\)
2 \(\mathrm{LnN}_{3}\) and \(\mathrm{LnX}\)
3 \((\mathrm{Ln})_{2} \mathrm{~N}_{3}\) and \(\mathrm{LnX}_{2}\)
4 \(\operatorname{LnN}\) and \(\operatorname{LnX}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321698 Which of the following is not the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\mathrm{[X e] 4 f^{14} 5 d^{10} 6 s^{1}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321699 Which of the following is the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\left[ {{\rm{Xe}}} \right]{\rm{4}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{5}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{6}}{{\rm{s}}^{\rm{2}}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321696 Across the lanthanide series, the basicity of the lanthanide hydroxides

1 increases
2 decreases
3 first increases and then decreases
4 first decreases and then increases.
CHXII08:THE D- & F-BLOCK ELEMENTS

321697 What are the formulae of the compounds formed when lanthanoids \((\mathrm{Ln})\) react with nitrogen and halogen respectively?

1 \(\mathrm{LnN}\) and \(\mathrm{LnX}_{3}\)
2 \(\mathrm{LnN}_{3}\) and \(\mathrm{LnX}\)
3 \((\mathrm{Ln})_{2} \mathrm{~N}_{3}\) and \(\mathrm{LnX}_{2}\)
4 \(\operatorname{LnN}\) and \(\operatorname{LnX}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321698 Which of the following is not the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\mathrm{[X e] 4 f^{14} 5 d^{10} 6 s^{1}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321699 Which of the following is the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\left[ {{\rm{Xe}}} \right]{\rm{4}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{5}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{6}}{{\rm{s}}^{\rm{2}}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321696 Across the lanthanide series, the basicity of the lanthanide hydroxides

1 increases
2 decreases
3 first increases and then decreases
4 first decreases and then increases.
CHXII08:THE D- & F-BLOCK ELEMENTS

321697 What are the formulae of the compounds formed when lanthanoids \((\mathrm{Ln})\) react with nitrogen and halogen respectively?

1 \(\mathrm{LnN}\) and \(\mathrm{LnX}_{3}\)
2 \(\mathrm{LnN}_{3}\) and \(\mathrm{LnX}\)
3 \((\mathrm{Ln})_{2} \mathrm{~N}_{3}\) and \(\mathrm{LnX}_{2}\)
4 \(\operatorname{LnN}\) and \(\operatorname{LnX}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321698 Which of the following is not the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\mathrm{[X e] 4 f^{14} 5 d^{10} 6 s^{1}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321699 Which of the following is the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\left[ {{\rm{Xe}}} \right]{\rm{4}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{5}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{6}}{{\rm{s}}^{\rm{2}}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321696 Across the lanthanide series, the basicity of the lanthanide hydroxides

1 increases
2 decreases
3 first increases and then decreases
4 first decreases and then increases.
CHXII08:THE D- & F-BLOCK ELEMENTS

321697 What are the formulae of the compounds formed when lanthanoids \((\mathrm{Ln})\) react with nitrogen and halogen respectively?

1 \(\mathrm{LnN}\) and \(\mathrm{LnX}_{3}\)
2 \(\mathrm{LnN}_{3}\) and \(\mathrm{LnX}\)
3 \((\mathrm{Ln})_{2} \mathrm{~N}_{3}\) and \(\mathrm{LnX}_{2}\)
4 \(\operatorname{LnN}\) and \(\operatorname{LnX}\)
MHTCET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321698 Which of the following is not the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\mathrm{[X e] 4 f^{14} 5 d^{10} 6 s^{1}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321699 Which of the following is the configuration of lanthanoid?

1 \(\mathrm{[\mathrm{Xe}] 4 f^{10} \cdot 6 s^{2}}\)
2 \(\mathrm{[X e] 4 f^{1} 5 d^{1} .6 s^{2}}\)
3 \(\left[ {{\rm{Xe}}} \right]{\rm{4}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{5}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{6}}{{\rm{s}}^{\rm{2}}}\)
4 \(\mathrm{[X e] 4 f^{7} 5 d^{1} 6 s^{2}}\)