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STD 12 - 4. d and f- block elements — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. d and f- block elements4 Marks
MCQ
Which of the following element does not show variable valency
  • A
    $Ni$
  • ✓
    $Zn$
  • C
    $Cu$
  • D
    $Mn$
✓

Answer

Correct option: B.
$Zn$
b
(b)The electronic configuration of $Zn$ is $(Ar)3{d^{10}}4{s^2}$. Hence due to complete $d-$ subshell, it does not show variable valency.

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