Q1. [1] straightforward initial-understanding
When a magnesium ribbon is burnt in air, a white powdery product is formed. Name this product and write the chemical equation for the reaction.
Generated by claude-sonnet-4-6 · 2026-06-26 00:53 · grounding rag
Model Answer
The product is magnesium oxide (MgO).
$$2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$$
Source: Chapter 1, Section 1.1 / Chapter 3, Section 3.2.1
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Explanation
- The question asks two things: name the product and write the equation — both must be included even in a 1-mark answer (they together form one complete response).
- Always write the balanced equation; the skeletal form `Mg + O₂ → MgO` is unbalanced and will lose marks.
- The product name "magnesium oxide" and its formula "MgO" are both acceptable; writing both is safest.
- No need for state symbols here unless specifically asked.