2023 · Q31
Consider the following statements regarding burning of magnesium ribbon in air:
- 1White powder of MgO is formed.
- 2It is an example of combustion reaction.
- 3Heat and light are produced.
Which of the statements given above are correct?
General KnowledgeChemistry
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3
Explanation
Statement 1 is true: magnesium burns in air to form a white powder of magnesium oxide (2Mg + O2 -> 2MgO). Statement 2 is true: burning in oxygen/air is a combustion reaction. Statement 3 is true: the reaction is highly exothermic, producing intense heat and a dazzling white light (used in flares). All three statements are correct.