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Question

Which of the following product is formed due to burning of a magnesium ribbon with a spirit lamp?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
Magnesium oxide

Burning Magnesium Reaction

When a magnesium ribbon is burned in the presence of air using a heat source like a spirit lamp, it undergoes a combustion reaction.

Magnesium (Mg) reacts with oxygen (O2) present in the air.

The balanced chemical equation for this reaction is:

$ 2Mg_{(s)} + O_{2(g)} \rightarrow 2MgO_{(s)} $

The solid product formed is magnesium oxide (MgO).

Therefore, burning magnesium ribbon forms magnesium oxide.

Comparing this with the given options:

  • Magnesium sulphate (MgSO4)
  • Magnesium dioxide (This is not a stable compound formed under these conditions)
  • Magnesium oxide (MgO)
  • Magnesium hydroxide (Mg(OH)2)

The correct product is Magnesium oxide.

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