NEW
Font size
S
M
L
XL
WorksheetsChapter 10: Chemical Reactions
Total questions: 38
Worksheet time: 19mins
Name
Class
Date
1.
In the equation, 2Mg + O2 = 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
2.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
3.
Which of the following is a chemical change rather than a physical change
a)
boiling water at 100 C
b)
chopping up a piece of wood.
c)
cooking a cake
d)
ice carbon dioxide sublimating to gas
4.
The process going from a gas to a liquid is called ...
a)
evaporation
b)
melting
c)
condensation
d)
sublimation
5.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
6.
An gel ice pack getting cold after you put it in the freezer for an hour.
a)
Chemical Change
b)
Physical Change
7.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
8.
Which of the following IS a chemical change
a)
using chalk
b)
water freezing
c)
slicing cheese
d)
digestion
9.
Is "a glass of milk becoming sour" physical or chemical?
a)
Chemical change
b)
Physical change
10.
Is "word burning in a fireplace" a chemical or physical change?
a)
Chemical change
b)
Physical change
11.
Is "sugar dissolves in water" a chemical or physical change?
a)
Chemical change
b)
Physical change
12.
Is "mold growing on cheese" a chemical or physical change?
a)
Chemical change
b)
Physical change
13.
Tomato juice is made from ripe tomatoes. Physical or chemical change?
a)
Chemical change
b)
Physical change
14.
A pencil is sharpened. Physical or chemical change?
a)
Physical change
b)
Chemical change
15.
A brass door knob tarnishes. Physical or chemical change?
a)
Chemical change
b)
Physical change
16.
A substance’s _________is the particulartemperature at whichthe substance changes from solid to liquid
a)
melting point
b)
freezing point
c)
boiling point
d)
condensation point
17.
_______ is thetemperature at which a substance changes state from liquid to gas
a)
melting point
b)
boiling point
c)
freezing point
d)
gasification point
18.
_______ is the temperatureat which a substancechanges from a liquid to a solid
a)
melting point
b)
boiling point
c)
freezing point
d)
solifidication point
19.
At what temperature (celcius) does water start to boil?
a)
100 degrees
b)
180 degrees
c)
65 degrees
d)
212 degrees
20.
Changingfrom one state of matterto another does not involve energy
a)
true
b)
false
21.
What is formed by the chemical combination of two or more elements?
a)
compound
b)
physical change
c)
mixture
d)
solute
22.
What two elements make up the compound iron oxide?
a)
iron and carbon
b)
iron and oxygen
c)
iron and sulfur
d)
iron and nitrogen
23.
How many chlorineatoms are found in amolecule of ZnCl2 ?
a)
1
b)
2
c)
3
d)
4
24.
_______ are the original substances at the beginning of a chemical reaction
a)
reactants
b)
products
c)
precipitates
d)
elements
25.
A ________ is the substance at the end of a chemical reaction
a)
reactant
b)
product
c)
surprise
d)
chemical solution
26.
What is the term for a change of matter in size, shape, or state that does not change the type of matter?
a)
chemical change
b)
combination
c)
physical change
d)
altering
27.
What is the term for a change of matter that occurs when atoms link together in a new way, creating a new substance different from the original substance?
a)
chemical change
b)
physical change
28.
A ________ is a substance that tastes sour and turns blue litmus paper red
a)
acid
b)
base
c)
salt
d)
electrolyte
29.
A __________ is a substance that tastes bitter and turns red litmus paper blue
a)
acid
b)
base
c)
salt
d)
electrolyte
30.
What is the pH of water?
a)
4
b)
6
c)
7
d)
12
31.
Atoms or molecules that have gained or lost electrons are called __________
a)
acids
b)
bases
c)
ions
d)
elements
32.
What is a solid brown compound formed when iron combines chemically with oxygen?
a)
rust
b)
copper
c)
nitrogen
d)
sulfur
33.
What is a compound?
a)
the simplest form of a substance
b)
a combination only of 3 elements
c)
a combination of 2 or more elements
d)
a place where people are held
34.
What is a mixture?
a)
a combination of elements to make a new substance
b)
a chemically combined substance
c)
a combination of substances where new substances are formed through a reaction
d)
a combination of substances in which the atoms of the substance do not chemically combine
35.
What would you be able to do with a filter, magnet, or strainer when thinking about a mixture?
a)
separate them
b)
combine them chemically
c)
combine them physically
36.
In a solution which part of the solution is the solute: ice tea mix or water?
a)
ice tea mix
b)
water
c)
ice tea
37.
What is a substance that is dissolved in another substance?
a)
solution
b)
solute
c)
solvent
d)
compound
38.
What is the simplest form that cannot be broken down to anything simpler?
a)
element
b)
solution
c)
compound
Reset
