EasyChemistryHigh School (9–10)GeneralChemical Reactions › Types of Chemical ReactionsConceptualBoard Exam

Name the type of each reaction. 2CO + O₂ → 2CO₂; 2HgO → 2Hg + O₂; Mg + CuSO₄ → MgSO₄ + Cu; KCl +…

Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

Name the type of each reaction.

$2\text{CO} + \text{O}_2 \rightarrow 2\text{CO}_2$
$2\text{HgO} \rightarrow 2\text{Hg} + \text{O}_2$
$\text{Mg} + \text{CuSO}_4 \rightarrow \text{MgSO}_4 + \text{Cu}$
$\text{KCl} + \text{AgNO}_3 \rightarrow \text{AgCl} + \text{KNO}_3$

Need a reminder? The key ideaShow

Combination: $\text{A} + \text{B} \rightarrow \text{AB}$ . Decomposition: $\text{AB} \rightarrow \text{A} + \text{B}$ , by heat, light or electricity. Displacement: $\text{A} + \text{BC} \rightarrow \text{AC} + \text{B}$ , when A is more reactive. Double displacement: $\text{AB} + \text{CD} \rightarrow \text{AD} + \text{CB}$ , often with a precipitate.

The worked solution

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Name the type of each reaction. 2CO + O₂ → 2CO₂; 2HgO → 2Hg + O₂; Mg + CuSO₄ → MgSO₄ + Cu; KCl +…

The worked solution

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