A student burnt a magnesium ribbon in air and obtained a white powder. Which is the correct conclusion about the powder and the reaction?
Answer and explanation
Correct answer: Magnesium oxide and combination reaction
Magnesium burns in oxygen present in air to form white magnesium oxide: \(2\mathrm{Mg}+\mathrm{O}_2\rightarrow2\mathrm{MgO}\). Since two reactants combine to form one product, this is a combination reaction. In contrast, a decomposition reaction involves one compound breaking down into two or more substances.
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What is the correct answer to this question?
Magnesium oxide and combination reaction
Why is this the correct answer?
Magnesium burns in oxygen present in air to form white magnesium oxide: \(2\mathrm{Mg}+\mathrm{O}_2\rightarrow2\mathrm{MgO}\). Since two reactants combine to form one product, this is a combination reaction. In contrast, a decomposition reaction involves one compound breaking down into two or more substances.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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