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WorksheetsChemistry Benchmark
Total questions: 51
Worksheet time: 26mins
A Change in Matter that produces a new substance is called a:
Chemical Reaction
Physical Change
Mixture
Solution
Using the chemical equation below to answer:
H2 + O2 🡪 H2O
Is this equation balanced?
Yes
No
H2 + O2 🡪 H2O
What are the reactants in this equation?
Hydrogen gas and Oxygen gas
Only Hydrogen gas
Only Oxygen gas
Only Water
What does the arrow stand for in a chemical equation
equals
coefficient
plus
yields
A solid that forms when mixing 2 liquids during a chemical reaction is called a(n):
element
mixture
bond
precipitate
A substance that tastes bitter and feels slippery is a(n):
acid
base
indicator
precipitate
If a solution has a pH of 7, the solution is:
an acid
a base
neutral
a precipitate
Carbon Dioxide and Water are examples of:
elements
compounds
mixtures
precipitates
You can find the pH of a substance by using:
Litmus paper
A thermometer
pH paper
Phenolphthalein
What is the independent variable in this experiment: “Will the chemical reaction speed up if I heat up the chemicals?”
The color change
The precipitate
The speed of the chemical reaction
The temperature of the chemicals
How does a balanced chemical equation support the law of conservation of matter?
It shows that all the matter present at the beginning of a reaction is still there at the end of a chemical reaction.
It shows that matter is both created and destroyed in a chemical reaction.
It shows that matter was created in a chemical reaction.
It shows that matter was destroyed in a chemical reaction.
Which of these is a chemical property of oxygen?
It boils at -182.95°C.
It will result in rust when combined with iron and water.
It is colorless.
It is a gas at 25°C.
When liquid water evaporates into water vapor, it is undergoing a state change. This is a:
physical change
chemical change
In a fit of rage, Ms. Holcomb crushes a rock with a hammer. Now the rock is in a million pieces on the floor. This is a:
physical change
chemical change
It is so cold in Ms. Holcomb's classroom that Ms. Holcomb builds a campfire. When wood burns, it changes into ashes and smoke. This is a:
physical change
chemical change
I have an element that is malleable, shiny, and conducts electricity. What type of element is this?
acid
base
metal
nonmetal
Helium, Neon, Argon, Krypton, Xenon, and Radon make up the last column on the periodic table and all have similar properties. What do we call these elements?
cousins
sisters
a family
a period
Soil, Air and Saltwater are all examples of:
elements
compounds
mixtures
precipitates
Which elements in the table above are probably metals based on the information given?
v, x, and z
w and y
w only
x only
The graduated cylinder shown to the right contains three liquids labeled 1, 2 and 3. The objects (A, B, and C) in the cylinder are made from three different substances. Which of the following statements is true?
Object A is more dense than liquid 1
Object C is more dense than liquid 2
Object B is more dense than liquid 2
Liquid 1 is more dense than liquid 3
Which of the following is a heterogeneous mixture?
calcium
kool-aid
salad
sugar
Which of the following is NOT matter?
water
air
sound
dirt
The temperature at which a liquid becomes a gas is called:
sublimation
melting point
condensation
boiling point
Matter is:
anything that has mass
anything that takes up spave
anything that has mass and takes up space
anything that does NOT have mass and does NOT take up space
What does 37 stand for the element of Rubidium (Rb)?
Element symbol
Element weight
Atomic number
Atomic mass
The chemical formula for calcium cyanamide is CCaN2. What is the ratio of carbon (C) to calcium (Ca) to nitrogen (N) in this compound?
1:1:2
0:0:2
1:0:2
2:2:1
The chemical formula for glucose is C6H12O6. What elements make up this compound?
carbon, halogen and argon
carbon, nitrogen and oxygen
carbon, hydrogen and oxygen
carbon, helium and oxides
coffee has the a pH of 5.0 - what color would coffee turn litmus paper?
blue
Magenta
Purple
Red
Which of the substances in the chart below is the most acidic?
Pure water - 7.0
coffee - 5.0
Apple juice: 3.5
cola: 2.5
Cola
Apple juice
Pure water
Coffee
Which of the following indicates that a chemical reaction is taking place?
Temperature change
Color change
Formation of precipitate
All of the above
You test an unknown element, and its melting point is 232°C. What might it be?
lead
mercury
oxygen
tin
Which of these is a chemical change?
boiling water
a rusting car
ripping paper
both A and B
Which best describes physical and chemical changes?
In a physical change, the matter might change some properties but it is the same substance; in a chemical change the original material changes into a different substance with different properties.
In a physical change, the original material changes into a different substance with different properties; in a chemical change the matter might change some properties but it is the same substance
In both physical and chemical changes, the matter might change some properties, but it is the same substance.
In both physical and chemical changes, the original material changes into a different substance with different properties.
In which set below are each of the chemical names paired with their correct chemical formula?
salt – NaCl
carbon dioxide – CO2
oxygen - O2
salt – C6H12O6
carbon dioxide – O2
oxygen – CO2
salt – O2
carbon dioxide – CO2
oxygen – C6H12O6
salt – O2
carbon dioxide – NaCl
oxygen – CO2
While using a periodic table, the elements that are _______ have similar chemical properties.
in the same group or family
in the same period
beside each other
the same number
Nonmetals are on the
Right side of the periodic table
Left side of the periodic table
In the middle of the periodic table
The last two rows of the periodic table
Zn + Ag2S 🡪 ZnS + ?Ag
The coefficient should be used in place of the questions mark to balance the equation above ?
1
2
3
4
Which lake is the most acidic?
** see graph
Lake A
Lake B
Lake C
Lake D
Lake trout are fish that live in many freshwater lakes. When the pH of the water in a lake drops below 5.5, this species of fish can no longer reproduce, because its eggs cannot hatch. Which of the following statements is most likely true?
Lake trout have probably stopped reproducing in all the lakes.
In terms of reproducing, lake trout are not in danger of in any of the lakes.
Lake trout will probably be able to reproduce in Lake A, B, and G, but not in the others.
Lake trout have probably stopped reproducing only in lakes C, D, and F.
Antoine Lavoisier is credited with the discovery of the law of conservation of matter. This law states that during a chemical reaction, matter is not created or destroyed. Which equation below correctly models this law?
**Hint: the law of conservation of matter says that matter needs to be equal on both sides of the equation: So which is balanced?
H2 + O2 🡪 H2O
Na + Cl2 🡪 NaCl
2Cu + O2 🡪 2CuO
FeS + 2HCl 🡪 FeCl + 2H2S
You are given a sample of a clear liquid, a piece of blue litmus paper, a piece of red litmus paper, and a drop of phenolphthalein. When you place the blue litmus paper into the liquid, it remains blue. When you place the red litmus paper into the liquid, it turns blue. When you place the drop of phenolphthalein into the liquid it turns magenta. Based on these observations, how would you identify this unknown substance?
An Acid with a pH of less than 7
An acid with a pH of greater than 7
A base with a pH of less than 7
A base with a pH of greater than 7
You have a glass of pure water. Which is the correct classification for the water in the glass?
compound
element
mixture
solution
Suppose a tablespoon of sugar is added to the glass or water above. Which would best describe the contents of the glass after the sugar has been added?
compound
element
mixture
precipitate
True or False?
Soap is a base.
True
False
True or False?
The periodic table has over 1,000 elements
True
False
True or False?
The periodic table has over 1,000 elements
True
False
True or False?
In a chemical reaction, matter can be both created AND destroyed
True
False
True or False?
H2O is the chemical formula for water
True
False
True or False?
All matter is made up of atoms
True
False
True or False?
Water is an element
True
False
What is the symbol for the element Gold
Au
Ag
G
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