WBCS.LIVE practice question

Mg (s) + O2 (g) → Mg (s) + energy, this reaction may be classified as a/an:

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Combination reaction
  2. Oxidation reaction
  3. Exothermic reaction
  4. All of the above

Correct answer and explanation

Correct answer: All of the above

Explanation: The reaction of Mg with O₂ is a combination, oxidation, and exothermic reaction - hence “All of the above.” 📚 Other Information: ▪️ Magnesium burns in oxygen with a dazzling white flame. ▪️ Reaction: 2Mg + O₂ → 2MgO + energy. ▪️ It is a combination reaction (two reactants form one product). ▪️ It is an oxidation reaction (Mg gains oxygen). ▪️ It is exothermic, releasing a large amount of heat and light. ▪️ The product magnesium oxide is basic in nature. ▪️ Magnesium ribbon must be cleaned before burning to remove oxide coating. ▪️ The reaction is commonly demonstrated in school chemistry labs.