NEW
Font size
WorksheetsPractice
Total questions: 20
Worksheet time: 10mins
4Ca(OH)2
Iron reacts with sulfur to produce iron(II) sulfide. Choose the correct word equation.
iron + solid → iron sulfide
iron + sulfur → iron sulfide
iron sulfide + iron→ sulfur
sulfur + iron sulfide → iron
Magnesium can be burned in oxygen to produce solid magnesium oxide. What is the correct skeleton equation ?
Mg + O2→ MgO
Mg+ O→ MgO
Mg + CO2 → MgO + C
Mg + O2→ Mg2O2
Iron reacts with solid sulfur to produce iron(II) sulfide powder. What is the correct skeleton equation ?
Fe + S → Fe2S
Fe + S → FeS
Fe2 + S→ Fe2S2
Fe + S2 → Fe2S
Potassium chlorate solid when heated produces potassium chloride solid and oxygen gas. What is the correct skeleton equation ?
KClO3 --> KCl + O2
PClO3 --> PCl + O2
KClO3 --> KCl + O
KCl --> KCl + O2
Hydrogen gas and chlorine gas produce hydrogen chloride What is the correct skeleton equation ?
H2 + Cl2 --> HCl
H + Cl --> HCl
H2 + Cl2 --> H2Cl2
H + Cl --> H2Cl
_CH4 + _O2 --> _CO2 + _H2O
A chemical change in which two or more substances react to form one single product is a ____________________________.
decomposition reaction
synthesis reaction
double displacement reaction
combustion reaction
How many H's are found in 3(NH₄)₂CrO₄
4
2
8
24
Whiich type of reaction requires energy in the form of heat and light to proceed?
Decompostion
Syntheses
What must methane be combined with to undergo a combustion reaction?
carbon dioxide
energy
oxygen
hydrogen
What is the type of reaction shown above?
Synthesis
Decomposition
Single Replacement
Double Replacement
Identify the reaction type:
C2H6 + O2 --> CO2 + H2O
Double replacement
Synthesis
Acid base
Combustion
Identify the reaction type:
H2O2 --> H2O + O2
Decomposition
Synthesis
Combustion
Acid Base
In a chemical equation, the symbol (aq) indicates that the substance is
water
dissolved in water
an acid
insoluble
In which type of reaction do two or more compounds react to form one product?
synthesis
decomposition
combustion
single-displacement
C + O2 -------> CO2 is a (an) _______ reaction.
syntheses only
combustion only
both syntheses an combustion
