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Chemical Reactions (Part 1)
Test Description: Chemical Reactions (Part 1)
Instructions: Answer all questions to get your test result.
1) A ________________ DOES NOT produce new substances or products.
A
endothermic chemical reaction
B
chemical change
C
exothermic chemical reaction
D
physical change
2) During a _____________________, one or more substances or reactants CHANGE into new substances or products.
A
condensation event
B
physical change
C
sublimation event
D
chemical change
3) A chemical reaction is a process in which atoms of one or more substances ________________ to form one or more new substances.
A
disappear
B
rearrange
C
duplicate
D
implode
4) Which of the following would be an example of a physical change?
A
Wood Burning
B
Water evaporating
C
An Egg Frying
D
Iron Rusting
5) Which of the following would be an example of a chemical change?
A
an Ice Cube Melting
B
Chopping Wood
C
Crushing a Tin can
D
Fireworks
6) In which of the following circumstances, can you infer that a chemical reaction has occurred?
A
Neither of These
B
Water changes to ice when it is placed in the freezer.
C
Both of These
D
Bright copper turns green when it is placed in air.
7) In which of the following circumstances, can you infer that a chemical reaction has occurred?
A
Neither of These
B
A piece of wood is carved into the shape of a baseball bat.
C
Meat begins to smell after it sits in the hot sun for a few hours.
D
Both of These
8) In which of the following circumstances, can you infer that a chemical reaction has occurred?
A
Both of These
B
Neither of These
C
A nail rusts when it is left out in the rain for two days.
D
A firefly gives off light when it flies in the backyard.
9) A _____________________ is a description of a reaction using element symbols and chemical formulas.
A
chemical equation
B
chemical equilibrium
C
chemical formula
D
mandelbrot set
10) Some elements exist in nature as _____________________ -two atoms bonded together. These will be found with a subscript of 2.
A
Binary Compounds
B
Diatomic Molecules
C
Biatomic Molecules
D
None of These
11) The starting substances in a chemical reaction are referred to as _______________.
A
components
B
ingredients
C
reactants
D
products
12) The substances produced by the chemical reaction are referred to as ____________.
A
diatoms
B
products
C
reactants
D
summative substances
13) Which of the following represents the appropriate structure for a chemical equation? ***Yields*** symbolizes a right pointing arrow
A
product + product ---yields--- reactant + reactant
B
reactant + product ---yields--- reactant + product
C
None of These
D
reactant + reactant ---yields--- product + product
14) The ______________________________ states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction.
A
Law of Mass Equilibrium
B
Law of Molecular Stability
C
Law of Conservation of Energy
D
Law of Conservation of Mass
15) Which of the following represents the correct sequence of actions to follow when balancing a chemical equation?
A
Write the Unbalanced Chemical Equation -- Count Atoms -- Add Coefficients -- Write the Balanced Chemical Equation
B
Write the Balanced Chemical Equation -- Write the Unbalanced Chemical Equation -- Count Atoms -- Add Coefficients
C
Write the Unbalanced Chemical Equation -- Add Coefficients -- Count Atoms -- Write the Balanced Chemical Equation
D
Add Coefficients -- Write the Balanced Chemical Equation -- Write the Unbalanced Chemical Equation -- Count Atoms
16) I will be expected to know how to balance a chemical equation for this Summative Assessment.
A
TRUE - I should review this on R13 and it's Supplement
B
-
C
-
D
FALSE - I should troll people on facebook instead of reviewing this stuff
17) When hydrogen peroxide interacts with sunlight it undergoes a chemical change, which yields Water and Oxygen. What kind of chemical reaction does this represent?
A
Single-Replacement
B
Decomposition
C
Synthesis
D
Combustion
18) In a ________________________ reaction, one compound breaks down and forms two or more substances.
A
synthesis
B
combustion
C
decomposition
D
replacement
19) A ________________ reaction is a type of chemical reaction in which two or more substances combine to from one compound.
A
synthesis
B
decomposition
C
double-replacement
D
combustion
20) Magnesium reacts with Oxygen in the air and forms Magnesium Oxide. The previous sentence describes what kind of reaction?
A
combustion
B
synthesis
C
decomposition
D
single-replacement
*select an answer for all questions
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