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WorksheetsChemical Reactions & Equations MCQ
Total questions: 10
Worksheet time: 5mins
What type of chemical reaction is represented by the following equation: 2H2 + O2 -> 2H2O?
Acid-base reaction
Single displacement reaction
Combination reaction
Decomposition reaction
What type of reaction is represented by the following equation: 2Mg + O2 -> 2MgO?
Combination reaction
Decomposition reaction
Acid-base reaction
Single displacement reaction
In a double displacement reaction, what happens?
Atoms combine to form new molecules
Positive ions and negative ions of two ionic compounds switch places
The reaction does not result in any products
Only one reactant is involved
What is the product of a combustion reaction involving hydrocarbons?
Nitrogen and sulfur dioxide
Methane and oxygen
Carbon monoxide and nitrogen oxides
Carbon dioxide and water
What type of reaction is represented by the following equation: Fe + S -> FeS?
Single displacement reaction
Synthesis reaction
Decomposition reaction
Combustion reaction
What happens in a decomposition reaction?
No substances are formed
A compound remains unchanged
A single compound breaks down into two or more simpler substances.
A single compound combines with another compound
What type of reaction is represented by the following equation: 2NaCl -> 2Na + Cl2?
Synthesis reaction
Single displacement reaction
Combustion reaction
Decomposition reaction
What is the general formula for a synthesis reaction?
AB -> A + B
A -> AB + B
A + B -> AB
A + B -> BA
What type of reaction is represented by the following equation: 2H2O -> 2H2 + O2?
Single displacement reaction
Synthesis reaction
Combustion reaction
Decomposition reaction
What is the key characteristic of a single displacement reaction?
One element replaces another element in a compound
Two elements replace each other in a compound
No elements are replaced in a compound
The compound remains unchanged
