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Which one among the following oxides has the highest melting point?

Options

  1. ANa ₂ O
  2. BMgO
  3. CFe ₂ O ₃
  4. DCuO

Correct answer

B. MgO

Step-by-step solution

Among the options given, the oxide with the highest melting point is MgO (Magnesium oxide). Magnesium oxide has a very high melting point of about 2,852^ C (5,166^ F ) . This high melting point is due to the strong ionic bonds between magnesium and oxygen atoms in the crystal lattice structure of MgO.

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