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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
Most acidic among given compound is
  • A
    $Pr(OH)_3$
  • B
    $Gd(OH)_3$
  • C
    $Sm(OH)_3$
  • ✓
    $Er(OH)_3$
✓

Answer

Correct option: D.
$Er(OH)_3$
d
In lanthanoids hydroxides on moving left to right acidic nature increases.

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