WorksheetsChemical Reactions
Total questions: 34
Worksheet time: 19mins
What type of chemical reaction is the following: C3H8 + 5O2 → 3CO2 + 4H2O?
Combustion reaction
Synthesis reaction
Single displacement reaction
Decomposition reaction
In a synthesis reaction, what is the general form of the chemical equation?
AB + C → D
A + B → AB
A + B → C + D
A + B + C → D
What type of chemical reaction is the following: 2H2O → 2H2 + O2?
Single displacement reaction
Decomposition reaction
Synthesis reaction
Combustion reaction
In a decomposition reaction, what is the general form of the chemical equation?
AB + C → A + B + C
AB → A - B
AB → A + B
A + B → AB
What type of chemical reaction is the following: Zn + 2HCl → ZnCl2 + H2?
Combustion reaction
Single displacement reaction
Double displacement reaction
Decomposition reaction
In a single displacement reaction, what is being displaced?
A solvent
An element
A compound
A catalyst
What type of chemical reaction is the following: AgNO3 + NaCl → AgCl + NaNO3?
Combustion reaction
Decomposition reaction
Single displacement reaction
Double displacement reaction
In a double displacement reaction, what occurs between the reactants?
Negative ions bond
Positive ions switch places
No reaction occurs
The reactants combine to form a single compound
What type of chemical reaction is the following: C6H12O6 + 6O2 → 6CO2 + 6H2O?
Synthesis reaction
Decomposition reaction
Acid-base reaction
Combustion reaction
In a combustion reaction, what are the typical reactants and products?
Hydrogen and nitrogen; methane and sulfur dioxide
Carbon monoxide and nitrogen; hydrogen and oxygen
Fuel and oxygen; carbon dioxide and water
Methanol and carbon dioxide; nitrogen and water
What is a chemical reaction?
A process in which substances remain the same with no change in properties.
A process in which substances are converted into different substances with the same properties.
A process in which one or more substances are converted into different substances with different properties.
A process in which only solid substances are converted into different substances.
What is the difference between exothermic and endothermic reactions?
Exothermic reactions absorb heat energy from the surroundings
Exothermic reactions and endothermic reactions have no difference
Exothermic reactions release heat energy to the surroundings, while endothermic reactions absorb heat energy from the surroundings.
Endothermic reactions release heat energy to the surroundings
What is a catalyst and how does it affect chemical reactions?
A catalyst slows down a chemical reaction without being consumed in the process.
A catalyst has no effect on chemical reactions.
A catalyst only works in combination with other catalysts.
A catalyst speeds up a chemical reaction without being consumed in the process.
What are the signs that a chemical reaction has occurred?
No formation of a precipitate
Change in Color
No release of gas
Change in color, formation of a precipitate, release of gas, change in temperature
What is the law of conservation of mass and how does it apply to chemical reactions?
Mass is transformed into energy in a chemical reaction
Mass is neither created nor destroyed in a chemical reaction, it is only transformed from one form to another.
Mass is created in a chemical reaction and can be destroyed
Mass is only conserved in physical reactions, not chemical reactions
What are the factors that affect the rate of a chemical reaction?
Temperature, concentration, surface area, catalysts, and pressure
Phase of the reactants
Time of the day
Color o the reactants
Are the products or reactants of this reaction storing more energy in their chemical bonds?
Both storing the same
No way to tell
Products
Reactants
Based on the information in the graph, choose the statement that best describes the reaction that the graph represents.
The reaction absorbs energy.
The reaction releases energy.
The reaction fails to proceed because of insufficient energy.
The reaction fails to proceed because it does not involve an energy change.
Using the diagram, what is an accurate conclusion
Reaction is exothermic
Reaction is endothermic
a catalyst increased the activation energy
a catalyst decreased the activation energy
According to this image, which has more energy
reactants
products
Why does a higher temperature increase the rate of a reaction?
it increases both the frequency and energy of particle collisions
it only increases the frequency of particle collisions
it only increases the energy of particle collisions
it reduces the activation energy of the reaction
The blue numbers in the image below represent ________
solvents
coefficients
subscripts
elements
Which of these molecules releases the most energy when formed?
H2
O2
N2
Trick Question. Molecules absorb energy when they are formed
How much energy would be needed to separate this atom?
C-H Bond Energy: 413 kJ/mol
413 kJ/mol
826 kJ/mol
1239 kJ/mol
1652 kJ/mol
A chemical bond __________energy when it breaks.
increases
decreases
absorbs
releases
What is the right ratio of chemicals for the balanced chemical equation?
__Na + __H2O --> __NaOH + __H2
4,4 --> 4,1
1,2 --> 2,4
1,2 --> 2,1
2,2 --> 2,1
What is the right ratio of chemicals for the balanced chemical equation?
__Ca + __H2O --> __Ca(OH)2 + __H2
2,1 --> 2,1
1,2 --> 1,1
1,2 --> 2,4
1,2 --> 2,1
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?
__CH4 + __O2 --> __CO2+ __H2O
1,2 --> 2,1
1,2 --> 1,1
1,2 --> 1,2
2,1 --> 2,1
What is the right ratio of chemicals for the balanced chemical equation?
__H2SO3 + __KOH--> __H2O+ __K2SO3
2,1 --> 2,1
1,2 --> 1,1
1,2 --> 1,2
1,2 --> 2,1
What is the right ratio of chemicals for the balanced chemical equation?
__FeCl3 + __Ca(OH)2 --> __Fe(OH)3 + __CaCl2
4,3--> 2,1
3,2 --> 3,1
2,3 --> 2,2
2,3 --> 2,3
What is the right ratio of chemicals for the balanced chemical equation?
__MnO2 + __HCl --> __MnCl2 + __H2O __Cl2
4,1 --> 2,1,2
1,2 --> 1,1,4
1,4 --> 1,2,1
1,4 --> 2,2,1
What is the right ratio of chemicals for the balanced chemical equation?
__CO + __Fe2O3--> __Fe + __CO2
3,2 --> 1,1
3,2 --> 2,4
3,1 --> 2,3
3,2 --> 2,1
