Question

The products formed when Aluminium and Magnesium are burnt in the presence of air respectively are ______.

Options

• Al₃O₄ and MgO₂

• Al₂O₃ and MgO

• Al₃O₄ and MgO

• Al₂O₃ and MgO₂

Answer 1

The products formed when Aluminium and Magnesium are burnt in the presence of air respectively are Al₂O₃ and MgO.

Explanation:

When Aluminium (Al) and Magnesium (Mg) are burned in the presence of air, they react with oxygen to form their respective metal oxides.

Aluminium Reaction with Oxygen:

\[\ce{4Al + 3O2 -> 2Al2O3}\]

Forms Aluminium oxide (Al₂O₃), a stable and protective oxide layer.

Magnesium Reaction with Oxygen:

\[\ce{2Mg + O2 -> 2MgO}\]

Forms Magnesium oxide (MgO), a white powder.