Question

A magnesium ribbon burns with a dazzling flame in air (oxygen) and changes into a white substance 'X'. The X is?

• A. MgCO3
• B. Mg
• C. Mg(OH)2
• D. MgO

Answer 1

Answer:

D. MgO

• When magnesium burns in oxygen, it forms magnesium oxide (MgO), a white powdery substance

• The chemical reaction between magnesium metal and oxygen to generate magnesium oxide, for example, is called oxidation of magnesium

• Observations: Due to the burning, the magnesium oxide turns into a white powder.

• To produce this white powdery product, magnesium gives away two electrons to oxygen atoms