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WorksheetsChemical Reaction/Element/Compound/Mixture
Total questions: 30
Worksheet time: 15mins
Which of the following is a metal?
Helium
Carbon
Sodium
Arsenic
Which of the following is a nonmetal?
Aluminum
Carbon
Boron
Lithium
Which of the following is a metalloid?
Boron
Carbon
Beryllium
Bromine
Which of the following sets of elements are in the same group?
sodium, magnesium, aluminum
lithium, sodium, potassium
Which of the following sets of elements are in the same period?
sodium, magnesium, aluminum
lithium, sodium, potassium
What type of reaction is the following? FeS + HCl → FeCl2 + H2S
synthesis
decomposition
single replacement
double replacement
combustion
What type of reaction is the following? NaNO3 → NaNO2 + O2
synthesis
decomposition
single replacement
double replacement
combustion
What type of reaction is the following? Fe + CuNO3 → Cu + Fe(NO3)2
synthesis
decomposition
single replacement
double replacement
combustion
What type of reaction is the following? Al + S → Al2S3
synthesis
decomposition
single replacement
double replacement
combustion
What type of reaction is the following? C4H10 + O2 → CO2 + H2O
synthesis
decomposition
single replacement
double replacement
combustion
In the classroom demonstration, we had a solution of copper chloride to which we added pieces of aluminum foil. What type of reaction did you witness?
synthesis
decomposition
single replacement
double replacement
combustion
When a chemical reaction absorbs more energy than it releases, we tend to see a temperature drop. What type of reaction is this?
endothermic reaction
exothermic reaction
activation energy reaction
conservation reaction
After mixing 2 solutions in a beaker, you notice the beaker is warm when you touch it. This is evidence of
endothermic reaction
exothermic reaction
single replacement reaction
energy absorption
In the following equation, NaOH + HCl → NaCl + H2O , what are the reactants?
Na, O, H, Cl
NaOH and NaCl
NaCl + H2O
NaOH + HCl
How many electrons are needed in the outer most energy shell of most atoms to be chemically stable?
2
4
6
8
Which occurs before new bonds can form during a chemical reaction?
The atoms in the original substances are destroyed.
The bonds between atoms in the original substances are broken.
The atoms in the original substances are no longer moving.
the bonds between atoms in the original substances get stronger.
A scientist examined a colorless gas, which had a density between 1.30 and 1.60 g/L and a boiling point between -190 and -180 C. The gas reacted with Sodium (Na) metal. Based on the data in the table, what is the most likely identity of the gas?
Argon (Ar)
Fluorine (F2)
Hydrochloric Acid (HCl)
Oxygen (O2)
Which statement best describes the chemicals in the reaction? C + O2 -> CO2
C and O2 are reactants and CO2 is a product
C and O2 are products, and CO2 is a reactant
C and CO2 are products because they contain carbon
C, O2, and CO2 are all reactants because they are involved in a reaction.
Which is an example of a chemical reaction?
The melting of ice
the grinding of salt crystals to powder
The burning of wood
The evaporation of water from a puddle
Animals are made up of many atoms. What happens to the atoms after an animal has died?
The atoms stop moving
The atoms recycle back into the environment
The atoms split into simpler parts and then combine to form other atoms
The atoms no longer exist once the animal has decomposed
When 2 chemicals are mixed together, their temperatures drop. What kind of reaction is this?
Single Replacement
Endothermic
Exothermic
Combustion
What type of reaction is shown in the energy level diagram above?
Endothermic
Exothermic
Which reaction requires more energy to break reactant bonds than to make new bonds?
Endothermic
Exothermic
Which reaction releases energy in the form of Thermal Energy
Endothermic
Exothermic
Air is an example of a(n)
Element
Compound
Homogeneous Mixture (solution)
Heterogeneous Mixture
Nitrogen is an example of a(n)
Element
Compound
Homogeneous Mixture (solution)
Heterogeneous Mixture
Fruit Salad is an example of a(n)
Element
Compound
Homogeneous Mixture (solution)
Heterogeneous Mixture
Sugar (C6H12O6) is an example of a(n)
Element
Compound
Homogeneous Mixture (solution)
Heterogeneous Mixture
Milk is an example of a(n)
Element
Compound
Homogeneous Mixture (solution)
Heterogeneous Mixture
Salt Water is an example of a(n)
Element
Compound
Homogeneous Mixture (solution)
Heterogeneous Mixture
