Q10 / 200 · Manipal (MET) 2013 · Chemistry

Select incorrect statements.

  • A
    Ionisation energies of $5 d$ - elements are greater than those of $3 d$ and $4 d$ elements.
  • B
    Cu (I) is diamagnetic while Cu (II) is paramagnetic.
  • C
    $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ is colored while $\left[\mathrm{Sc}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{+}$is colourless.
  • Correct answer
    D
    Transition elements cannot form complexes.

Solution

Transition elements form comprexers . due to their straller'size, higher nuclear charge and presence of low energy vacant orbitals to accept lone pair of electrons donated by ligands.

Hence, the correct answer is option: 'D'.

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