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WorksheetsDecomposition Reaction
Total questions: 10
Worksheet time: 3mins
Choose the general equation for decomposition reaction:
A + B → A - B
A - B → AB
None of the above
AB → A + B
Fill in the missing product: 2Ni 2O3 → + 3O2
4Ni
Ni
2O
Hydrogen peroxide gradually decomposes to and when it is exposed to light.
water; oxygen
hydrogen; oxygen
hydrogen; oxygen
All of the above
Decomposition reaction is the opposite of a reaction
Synthesis
Photosynthesis
Combustion
Double-replacement
Examples of decomposition include:
2H2O2 → 2H2O + O2
NH3 + H2O → NH4OH
Two of the above
2NaCI → 2Na + CI2
Products of a decomposition reactions are always individual elements.
False
True
Which of the following chemical equation represents a decomposition reaction?
H2SO3 → H2O + SO2
2K + 2H2O → 2KOH + H2
None of the above
Two of the above
When a reactant breaks down to form two or more products, it is an addition reaction.
True
False
The reaction 2AI2O3 → 4AI + 3O2 is a decomposition reaction.
True
False
The substances that start a chemical reaction are called:
Reactants
Products
Hydrogen molecules
