Chemistry 9701 · AS & A Level · Electrochemistry

Electrochemistry — practice question

In which compound do two different elements have the same oxidation state?

  • A$\text{HClO}$
  • B$\text{Mg(OH)}_2$
  • C$\text{Na}_2\text{SO}_4$
  • D$\text{NH}_4\text{Cl}$

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