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The d & f Block Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Which one of the following paramagnetic in nature?
  • ✓
    $\ce{CuCl_2}$
  • B
    $\ce{CaCl_2}$
  • C
    $\ce{CdCl_2}$
  • D
    All of these.
✓

Answer

Correct option: A.
$\ce{CuCl_2}$
In $\ce{CuCl_2}, Cu$ is in $+2$ oxidation state. Electronic configuration of $\ce{Cu^{2+}}$ is $\ce{[Ar],3d^9},$ and is coloured and paramagnetic due to presence of an unpaired electron in the $3d$ sub$-$orbital.

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