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Chemical Reactions (Part 2)
Test Description: Chemical Reactions (Part 2)
Instructions: Answer all questions to get your test result.
1) In a _________________ reaction, one element replaces another element in a compound.
A
synthesis
B
combustion
C
single replacement
D
double-replacement
2) Replacement reactions involve a rearrangement of metal and nonmetal elements in Ionic Compounds.
A
TRUE
B
-
C
-
D
FALSE
3) Replacement reactions involve a rearrangement of nonmetal elements in Covalent Compounds.
A
FALSE
B
-
C
TRUE
D
-
4) Replacement reactions NEVER involve metal elements.
A
-
B
FALSE
C
TRUE
D
-
5) Combustion reactions always include Carbon Dioxide and Water as reactants.
A
-
B
TRUE
C
-
D
FALSE
6) Combustion reactions always include Carbon Dioxide and Water as products.
A
FALSE
B
-
C
TRUE
D
-
7) Combustion reactions always include diatomic oxygen molecules as reactants.
A
-
B
TRUE
C
FALSE
D
-
8) Combustion reactions always include diatomic oxygen molecules as products.
A
FALSE
B
-
C
-
D
TRUE
9) A combustion reaction usually releases energy as _________________________ energy.
A
thermal and nuclear
B
thermal and magnetic
C
thermal and electrical
D
thermal and light
10) I will be expected to identify what type of chemical reaction is occurring by looking at a chemical equation on this summative assessment.
A
FALSE - I should watch cringe compilations on Youtube instead of reviewing this stuff
B
TRUE - I should review this on R14
C
-
D
-
11) Chemical bonds contain a form of energy called ________________ energy.
A
kinetic
B
chemical
C
magnetic
D
thermal
12) When a chemical bond breaks, __________________.
A
energy is both released and absorbed
B
it releases energy to the surroundings
C
no energy is released or absorbed
D
it absorbs energy from the surroundings
13) When a chemical bond forms, __________________.
A
energy is both released and absorbed
B
no energy is released or absorbed
C
it releases energy to the surroundings
D
it absorbs energy from the surroundings
14) In physics and chemistry, the ______________________ states that the total energy of an isolated system remains constant; it is said to be conserved over time.
A
Law of Conservation of Density
B
Law of Conservation of Mass
C
Law of Conservation of Volume
D
Law of Conservation of Energy
15) Chemical Reactions that ABSORB thermal energy are called ____________________.
A
exothermic reactions
B
ectothermic reactions
C
kinetic reactions
D
endothermic reactions
16) Chemical Reactions that RELEASE thermal energy are called ____________________.
A
ectothermic reactions
B
exothermic reactions
C
kinetic reactions
D
endothermic reactions
17) ________________________ is the minimum amount of energy needed to start a chemical reaction.
A
Catalyst energy
B
Activation energy
C
Kinetic energy
D
Inhibitor energy
18) Which of the following could increase the rate of reaction in a chemical reaction?
A
Increase concentration of particles by pressurizing the reactants
B
Increase temperature of the reactants - speeding up the particles
C
Increase exposed surface area of the reactants
D
All of these could increase the rate of reaction
19) A(n) _________________ is a substance that increases a reaction rate by lowering the activation energy necessary for a reaction to occur. Enzymes serve this function in the chemical reactions that take place in our digestive system.
A
diatomic molecule
B
catalyst
C
inhibitor
D
coefficient
20) A(n) ___________________ is a substance that slows, or even stops, a chemical reaction.
A
inference
B
inhibitor
C
coefficient
D
catalyst
*select an answer for all questions
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