Respuesta :

  • Two hydroxide ions means two OH^- ions .
  • The valency of reactants must be 2

Only possible with alkaline earth metals

Let's see an example

[tex]\\ \sf\longmapsto X(OH)_2[/tex]

  • X belongs to group || i.e alkaline earth metals

The elements are

  • Magnesium (Mg)
  • Calcium (Ca)
  • Beryllium(Be)
  • Scandium(Sc)
  • Barium (Ba)
  • Renedium (Rn)

Option C is correct

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