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Types Of Chemical Reactions
Test Description: Chemical reaction types
Instructions: Answer all questions to get your test result.
1) A + B ------ AB is what type of reaction?
A
double replacement
B
synthesis
C
decompostion
D
single replacement
2) A reaction that has oxygen as a reactant and usually has carbon dioxide and water as products is a _____ reaction.
A
single replacement
B
double replacement
C
combustion
D
synthesis
3) AB ---- A + B is a ______ reaction
A
double replacement
B
decomposition
C
single replacement
D
synthesis
4) When two aqueous solutions mix and two things trade places with each other, a ______ reaction has occurred
A
synthesis
B
double replacement
C
single replacement
D
decomposition
5) Starting substances in a reaction are known as:
A
thingies
B
doo-hickeys
C
products
D
reactants
6) The symbol (aq) means:
A
gas
B
enzyme
C
liquid
D
solid
7) The reaction A + BC ---- B + AC is a _____ reaction
A
double replacement
B
synthesis
C
single replacement
D
combustion
8) In a combustion reaction, ____ is required in order for the reaction to take place
A
oxygen
B
water
C
carbon dioxide
D
nitrogen
9) In what kind of reaction does one element replace a similar element in a compound?
A
single replacement
B
synthesis
C
combustion
D
double replacement
10) According to the law of conservation of mass, the total mass of the reacting substances is
A
always equal to the total mass of the products.
B
always more than the total mass of the products.
C
sometimes more and sometimes less than the total mass of the products.
D
always less than the total mass of the products.
11) Which statement correctly describes how the following chemical equation violates the law of conservation of mass? H2 + O2 → 2HO2
A
There are the same number of hydrogen atoms on the left side of the arrow as there are on the right side.
B
There are more oxygen atoms on the right side of the arrow then on the left side.
C
There are more hydrogen atoms on the left side of the arrow then on the right side.
D
There are more hydrogen atoms on the right side of the arrow then on the left side.
12) In chemical reactions, the number of atoms in the product is __________.
A
the same as the number of atoms in the reactants
B
less than the number of atoms in the reactants
C
greater than the number of atoms in the reactants
D
the same as the number of molecules in the reactants
13) The mass of the reactants in a chemical reaction is 4.00 kg. After the reaction takes place completely, there will be __________.
A
4.00 kg of reactants
B
2.00 kg of products
C
2.00 kg of products
D
4.00 kg of products
14) Meals, Ready to Eat are an instant hot meal developed by the U.S. military for troops. The meal heats up when water is added to the magnesium metal tray because the chemical reaction between water and magnesium is an _________.
A
endothermic reaction
B
energy conserving action
C
evaporating
D
exothermic reaction
15) When substances are mixed, changes in heat energy provide evidence to show if a chemical reaction or a physical change has occurred. In chemical reactions, heat energy is often
A
created
B
released or absorbed
C
destroyed
D
created and destroyed
16) An iceberg melting in an ocean is an example of an endothermic process because:
A
A chemical reaction occurs between the iceberg and the ocean.
B
The iceberg releases thermal energy from the surrounding water.
C
It affects nearby wildlife.
D
The iceberg absorbs thermal energy from the surrounding water.
17) What type of reaction is the following: CH4 + 2O2 = CO2 + 2H2O
A
double displacement
B
synthesis
C
single displacement
D
combustion
18) What type of reaction is the following: 2NH3 = N2 + 3H2
A
redox
B
combustion
C
decompostion
D
single replacment
19) What type of reaction is the following: 2NaCl + H2SO4 = Na2SO4 + 2HCl
A
single replacement
B
synthesis
C
combustion
D
double replacement
20) What type of reaction is the following: Fe + S = FeS
A
single displacement
B
combustion
C
synthesis
D
double displacement
*select an answer for all questions
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