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WorksheetsChapter 19 PS review
Total questions: 32
Worksheet time: 40mins
Name
Class
Date
1.
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
In the above equation, what name do we give to the red 2?
In the above equation, what name do we give to the red 2?
a)
superscript
b)
subscript
c)
coefficient
d)
exponent
2.
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
In the above equation, what does the arrow mean?
In the above equation, what does the arrow mean?
a)
equals
b)
yields
3.
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
In the above equation, what name is given to the portion to the left of the arrow?
In the above equation, what name is given to the portion to the left of the arrow?
a)
reactant
b)
product
c)
yields
d)
subscript
4.
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
In the above equation, what is the name of the portion to the right of the arrow?
In the above equation, what is the name of the portion to the right of the arrow?
a)
reactant
b)
product
c)
yields
d)
coefficient
5.
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
In the above equation, what name is given to the blue 3?
In the above equation, what name is given to the blue 3?
a)
superscript
b)
subscript
c)
coefficient
d)
exponent
6.
What kind of reaction is shown in the picture
a)
Endothermic
b)
Exothermic
c)
Explosive
d)
Boring
7.
_________________ are the elements and compounds that enter into a chemical reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
8.
The energy needed to start a chemical reaction is the _____________________.
a)
Activation Energy
b)
Products
c)
Reactants
d)
Enzymes
9.
_______________ can speed up the rate of reactions and/or lower the amount of energy needed for
the reaction to take place.
the reaction to take place.
a)
Carbohydrates
b)
Fuel source
c)
Chemical
d)
Catalyst
10.
Enzymes are _____________________.
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
11.
Enzymes work by lowering the _______________________ for chemical reactions.
a)
Products
b)
Solutes
c)
Activation Energy
d)
Reactants
12.
___________________ are the elements are compounds that leave (are formed in) a chemical
reaction.
reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
13.
Chemical reactions that release energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Reactions
14.
Chemical reactions that absorb energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Explosive
15.
In the formula: C + O2 CO2, CO2 is the ____________________.
a)
Products
b)
Solution
c)
Answer
d)
Reactants
16.
The substances that are present before a reaction are the...
a)
reactants
b)
products
c)
both of these
d)
neither of these
17.
In a chemical equation, the substances that are on the right side of the arrow are the...
a)
reactants
b)
products
c)
catalysts
d)
inhibitors
18.
The substances on the left side of the arrow are...
a)
products
b)
reactants
c)
inhibitors
d)
catalysts
19.
A reaction that gives off heat to its surroundings is...
a)
exothermic
b)
endothermic
c)
endergonic
d)
none of these
20.
Which type of reaction will feel warm?
a)
endothermic
b)
exothermic
c)
endergonic
d)
none of these
21.
Which type of reaction will feel cold?
a)
exothermic
b)
exergonic
c)
endothermic
d)
none of these
22.
Substances that enter into a chemical reaction (found to the left side of the arrow)
a)
product
b)
reactant
c)
chemical
d)
balanced equation
23.
_______________ can speed up the rate of reactions and/or lower the amount of energy needed for
the reaction to take place.
the reaction to take place.
a)
Carbohydrates
b)
Fuel source
c)
Chemical
d)
Catalyst
24.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
25.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
not true
c)
obeyed
d)
used sometime
26.
____ N2 + ____ F2 ---> ____ NF3
a)
2,6,5
b)
1,2,1
c)
1,1,1
d)
1,3,2
27.
____ SO2 + ____ Li2Se --->____ SSe2 + ____ Li2O
a)
1,2,1,2
b)
1,4,1,4
c)
1,1,1,1
d)
1,3,1,4
28.
____ NaOH + ____ H2SO4 ---> ____ Na2SO4+ ____ H2O
a)
2,1,1,2
b)
1,1,1,1
c)
4,1,3,1
d)
1,2,1,2
29.
____ Pb(OH)2 + ____ HCl --->____ H2O + ____ PbCl2
a)
1,2,2,1
b)
1,1,1,1
c)
2,4,4,1
d)
1,2,1,1
30.
____ Na3PO4 + ____ KOH --->____ NaOH + ____ K3PO4
a)
1,2,1,2
b)
1,3,3,1
c)
1,1,1,1
d)
2,6,6,2
31.
____ N2 + ____ H2 ---> ____ NH3
a)
1,1,1
b)
3,1,2
c)
1,3,2
d)
2,6,4
32.
____ K + ____ Cl2 --->____ KCl
a)
1,1,1
b)
2,1,2
c)
1,2,2
d)
4,2,4
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