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WorksheetsCh. 19 - Chemical Reactions
Total questions: 89
Worksheet time: 1hrs 10mins
Name
Class
Date
1.
In a chemical equation, is it true that -
a)
the reactant side and product side can have different numbers of atoms for each element
b)
there can be different elements on the reactant side and the product side
c)
an element or compound must be accompanied by a phase change
d)
the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made
2.
Which of the following models best demonstrates a balanced chemical equation?
a)
F
b)
G
c)
H
d)
J
3.
AB + CD →AD + CB
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
4.
2 RbNO3 + BeF2 --> Be(NO3)2 + 2 RbF
a)
single displacement
b)
double displacment
c)
decomposition
d)
synthesis
5.
2 C5H5 + Fe --> Fe(C5H5)2
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
6.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
7.
Which of the following is the general formula for a decomposition reaction?
a)
A + B → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
8.
2 AgNO3 + Cu --> Cu(NO3)2 + 2 Ag
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
9.
NO2 →N2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
10.
The force that holds 2 atoms together is called a ________________.
a)
Chemical Reaction
b)
Chemical Bond
c)
Diatomic Chemical
d)
Glue
11.
A molecule made of 2 atoms is called a ____________________.
a)
Diatomic Molecule
b)
Chemical Bond
c)
Product
d)
Reactant
12.
What type of reaction involves 2 substances combining to form 1 new compound?
a)
Decomposition Reaction
b)
Single Displacement Reaction
c)
Double Displacement Reaction
d)
Synthesis Reaction
13.
What is a shorthand notation that represents a compound or molecule called?
a)
Chemical Equation
b)
Chemical Formula
c)
Chemical Reaction
d)
Chemical
14.
According to the law of conservation of mass...
a)
sometimes atoms are lost
b)
sometimes atoms are gained
c)
atoms are never lost nor gained
d)
atoms are lost and gained
15.
What do we call a substance that increases the rate of a reaction without participating in the reaction?
a)
catalyst
b)
inhibitor
c)
accelerator
d)
decelerator
16.
What type of reaction is shown in image?
a)
exothermic reaction
b)
endothermic reaction
c)
synthesis reaction
d)
decomposition reaction
17.
What type of reaction is shown in image?
a)
exothermic reaction
b)
endothermic reaction
c)
single displacement reaction
d)
double displacement reaction
18.
In an endothermic reaction energy is...
a)
released
b)
absorbed
c)
protons
d)
neutrons
19.
Which of the following will increase the rate of a reaction?
a)
raising the temperature of reactants
b)
grinding the reactants into a powder
c)
increasing the concentration of reactants
d)
all of the above
20.
Balance this equation-
__P4 + __O2 --> __P2O3
__P4 + __O2 --> __P2O3
a)
it is already balanced
b)
2, 1, 3
c)
1, 2, 3
d)
1, 3, 2
21.
Balance this equation
_N2 + _H2 --> _NH3
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
22.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
23.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
24.
What is the arrow in a chemical equation...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
25.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
26.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
27.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
28.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
29.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
30.
The minimum amount of energy needed to start a reaction is the.......
a)
activation energy
b)
exothermic energy
c)
chemical energy
d)
endothermic energy
31.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
32.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
33.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
34.
Is the combustion of gasoline endothermic or exothermic?
a)
Endothermic
b)
Exothermic
35.
What are the reactants in the chemical equation below?
Na+Cl2 → 2NaCl
Na+Cl2 → 2NaCl
a)
Na and Cl
b)
Na only
c)
NaCl
d)
2NaCl
36.
How do you know that energy is being absorbed during a chemical reaction?
a)
Temperature increases
b)
Temperature decreases
37.
A glow stick giving off light is an example of an...
a)
Endergonic reaction
b)
Exergonic reaction
c)
Endothermic reaction
d)
Exothermic reaction
38.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
39.
A substance that increases speed of chemical reaction without being being changed is called:
a)
Catalyst
b)
Acid
c)
Base
d)
pressure
40.
Activation energy is required to start a chemical reaction. What is activation energy?
a)
The energy needed for a reaction to occur
b)
The minimum amount of energy needed for a reaction to potentially occur
c)
The energy added by a catalyst
d)
The energy possessed by the products
41.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Cause particles to lose speed
d)
Increase collision between the particles thus increasing the rate.
42.
The amount of a substance in a given volume.
a)
concentration
b)
temperature
c)
surface area
d)
catalyst
43.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
44.
Exposing more particles for collisions is an increase in
a)
concentration
b)
surface area
c)
temperature
d)
catalyst
45.
Increasing the concentration increases the speed of reaction by
a)
lowering activation energy
b)
increasing collisions
c)
speeding up the reactants
d)
exposing more reactant
46.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
47.
Which of the following slows down the rate of a chemical reaction?
a)
Place the reactants in hot water
b)
Place the products in ice bath
c)
Place the reactants in a ice bath
d)
Keep stirring the reactants with a stirring rod
48.
B represents
a)
energy absorbed
b)
energy released
c)
activation energy
49.
This slows down or even stops a chemical reaction.
a)
de-activator
b)
catalyst
c)
enzyme
d)
inhibitor
50.
One clue of a chemical change is the formation of a precipitate. A precipitate is formed when
a)
Two liquids react and a gas is produced
b)
A solid dissolves in a liquid
c)
One liquid dissolves in another
d)
Two liquids react and a solid is formed
51.
In a chemical reaction, if the reactants are heated, the reaction usually happens
a)
Faster
b)
Slower
c)
At the same rate
d)
In a smaller volume
52.
For the reaction...
SO2 + O2 <−> SO3
If the equilibrium shifts to the right, the concentration of SO3 will ___________.
SO2 + O2 <−> SO3
If the equilibrium shifts to the right, the concentration of SO3 will ___________.
a)
increase
b)
decrease
c)
remain the same
d)
double
53.
For the reaction...
SO2 + O2 <−> SO3
If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.
SO2 + O2 <−> SO3
If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.
a)
left
b)
right
c)
left and right
d)
neither left nor right
54.
Which of the following is NOT a name of Ninja Turtle?
a)
Michelangelo
b)
Donatello
c)
Galileo
d)
Raphael
55.
Who is the oldest Kardashian sister?
a)
Kim
b)
Kourtney
c)
Khole
d)
Kendall
56.
What is the most used app?
a)
Twitter
b)
Facebook
c)
Instagram
d)
Pinterest
57.
What is the most spoken language in the world?
a)
Chinese
b)
English
c)
French
d)
Spanish
58.
According to USA Today 2016 survey, which is the most popular fast food restaurant in the United States?
a)
Subway
b)
Taco Bell
c)
Burger King
d)
McDonald's
59.
What was Pixar’s first movie?
a)
Toy Story
b)
A Bug's Life
c)
Finding Nemo
d)
Cars
60.
Who is the author of the Harry Potter series?
a)
Rick Riordan
b)
Walter Dean Myers
c)
Stephen King
d)
J.K. Rowling
61.
When is Sponge Bob's birthday ?
a)
July 14, 1986
b)
january 25,1986
c)
february 19
d)
December 30,1986
62.
What is Sponge Bob's snail's name ?
a)
gerry
b)
garry
c)
garfield
d)
gation
63.
What is the name of mr.krabs kid
a)
Krabs.jr
b)
Pearl
c)
Bob
d)
Can head
64.
Who is this
a)
Sandy
b)
Chippy
c)
Plankton
65.
Who is this?
a)
Chum Bucket Owner
b)
Plankton
c)
Chum
d)
Bucket
66.
Who is Sponge bob's pet?
a)
Gary
b)
The flying Dutchman
c)
Mrs.Puff
d)
Fish #7
67.
What is this show?
a)
Victorious
b)
iCarly
c)
Rocko's Modern Life
d)
Zoey 101
68.
What is this show?
a)
Sponge-Bob SquarePants
b)
Doug
c)
Rugrats
d)
The Fairly Odd Parents
69.
What is this show?
a)
Doug
b)
Rocko's Modern Life
c)
CatDog
d)
Victorious
70.
What is this show?
a)
Victorious
b)
Rocko's Modern Life
c)
iCarly
d)
Sam and Cat
71.
What is this show?
a)
iCarly
b)
Drake and Josh
c)
Victorious
d)
Rocko's Modern Life
72.
What is this show?
a)
Dora The Expolerer
b)
The Amanda Show
c)
Bubble Guppies
d)
Rocko's Modern Life
73.
What is this show?
a)
Victorious
b)
iCarly
c)
Zoey 101
d)
Full House
74.
What is this show?
a)
The Loud House
b)
Victorious
c)
BTR
d)
Big Time Crush
75.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
76.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
77.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
78.
When iron nails get rusty, heat is released. What process is this?
a)
Exothermic
b)
Endothermic
79.
Is respiration an Endothermic or an Exothermic reaction?
a)
Endothermic
b)
Exothermic
80.
If they energy required to break the bonds is greater than the energy given out by making new bonds the reaction is
a)
Exothermic
b)
Endothermic
c)
Neutralisation
81.
What type of reaction does this graphic represent?
a)
Decomposition
b)
Double-replacement
c)
Single-replacment
d)
Synthesis
82.
What type of reaction does this graphic represent?
a)
Decomposition
b)
Double-replacment
c)
Single-replacment
d)
Synthesis
83.
What type of reaction does this graphic represent?
a)
Decomposition
b)
Double-replacment
c)
Single-replacement
d)
Synthesis
84.
What type of reaction does this graphic represent?
a)
Decomposition
b)
Double-replacment
c)
Single-replacment
d)
Synthesis
85.
Each substance on the left side of the arrow in a chemical equation is a ____.
a)
catalyst
b)
coefficient
c)
product
d)
reactant
86.
If heat must be added to a chemical reaction for the reaction to take place (ex.- baking a cake), the reaction is ____.
a)
balanced
b)
endothermic
c)
exothermic
d)
non-thermic
87.
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
a)
There is no relationship.
b)
The mass of the products is greater.
c)
The mass of the reactants is greater.
d)
The masses are equal.
88.
What is an insoluble compound that forms during a chemical reaction?
a)
aqueous
b)
liquid
c)
precipitate
d)
solid
89.
The burning of wood in a campfire that produces heat and light would be both an ____ and an____ reaction.
a)
endergonic, exothermic
b)
exergonic, endothermic
c)
endergonic, endothermic
d)
exergonic, exothermic
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