The correct statement is

  • A
    The extent of actinoid contraction is almost the same as lanthanoid contraction.
  • B
    $Ce^{4+}$ in aqueous solution is not known.
  • C
    The earlier members of lanthanoid series resemble calcium in their chemical properties.
  • D
    In general,lanthanoids and actinoids do not show variable oxidation states.

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Similar Questions

Determine the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ $Lu^{3+}$ and $Yb^{2+}$ are not paramagnetic.
$(b)$ Sheets are made from mischmetal.
$(c)$ Pipes are made from mischmetal.

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The ion with $4f^7$ configuration is

Which of the following Lanthanoid ions are diamagnetic?

Use Hund's rule to derive the electronic configuration of $Ce^{3+}$ ion and calculate its magnetic moment on the basis of 'spin-only' formula.

Which orbitals,$4f$ or $5f$,are more capable of participating in bond formation?

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