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WorksheetsChemistry final
Total questions: 60
Worksheet time: 34mins
Name
Class
Date
1.
The amount of one material in a specified volume of another material (the amount of solute in a solvent)
a)
explosion
b)
saturation
c)
concentration
d)
solution
2.
What is diffusion?
a)
when molecules move
b)
when molecules move from a high concentration to a low.
c)
no movement
d)
molecules move everywhere
3.
Where is there a low concentration of dye?
a)
at the bottom of cup
b)
in the color
c)
at the top of cup
d)
no concenteraion gradient
4.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
5.
The solution with ________ solutes is hypertonic.
a)
lower
b)
higher
6.
The solution with __________ solutes is hypotonic.
a)
lower
b)
higher
7.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
8.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
9.
Turns litmus blue.
a)
Acids
b)
Bases
c)
Salts
d)
All
10.
Turns litmus red.
a)
Acids
b)
Bases
c)
Salts
d)
Water
11.
Feels slippery.
a)
Acids
b)
Bases
c)
All
12.
pH less than 7.
a)
Acids
b)
Bases
c)
All
13.
pH greater than 7.
a)
Acids
b)
Bases
c)
All
14.
A sample of pure water is neutral because it contains
a)
some H+ ions.
b)
equal amounts of hydroxide and hydrogen ions.
c)
some hydroxide ions.
d)
only H2O molecules.
15.
BASE + ACID ----> SALT +?
a)
water
b)
oxygen
c)
hydrogen ion
d)
hydroxide ion
16.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
d)
Molecules
17.
Amount of solute in a given amount of solvent or solution
a)
Concentration
b)
Miscible
c)
Solute
d)
solubility
18.
Substance dissolved in a solution
a)
concentration
b)
solute
c)
solvent
d)
solution
19.
This is a heterogeneous mixture in which particles settle out unless it is constantly stirred.
a)
colloid
b)
suspension
c)
solution
d)
alloy
20.
substance that dissolves the solute
a)
solution
b)
solvent
c)
saturation
21.
What type of chemical reaction is this one?
Al(OH)3 --> Al2O3 + H2O
Al(OH)3 --> Al2O3 + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
22.
What type of chemical reaction is this one?
CUO + CO2 --> CuCO3
CUO + CO2 --> CuCO3
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
23.
Dissolving sugar in water is an example of a
a)
physical change
b)
chemical change
24.
The burning of coal is an example of a
a)
chemical change
b)
physical change
25.
The melting of wax is an example of a
a)
chemical change
b)
physical change
26.
Digesting your food is an example of
a)
chemical change
b)
physical change
27.
What is a compound?
a)
A combination of two chemicals
b)
The base of a reaction
c)
A substance made of two or more atoms bonded together
28.
What is a mixture?
a)
A combination of two or more substances
b)
A flat substance
c)
A pair of atoms
29.
What is an element?
a)
A substance that cannot be broken down
b)
A collection of atoms
c)
Neutrons that make up the mass of an object
30.
Most atoms form bonds using ___.
a)
protons
b)
neutrons
c)
valence electrons
d)
electrons
31.
How many electrons fill the outermost orbital? (making the atom chemically stable)
a)
4
b)
6
c)
8
d)
10
32.
What is the charge of an aluminum ion that has 13 protons and 10 electrons?
a)
+1
b)
+3
c)
-3
d)
-1
33.
Most molecules are composed of what?
a)
one or more elements
b)
two or more elements
c)
three or more elements
d)
four or more elements
34.
What is the force that holds atoms together to form a molecule?
a)
gravity
b)
chemical bond
c)
the nuclear force
d)
electromagnetic
35.
What kind of chemical bond forms between a metal and a nonmetal?
a)
Covalent bond
b)
Ionic bond
c)
Can be either covalent or ionic
d)
Hydrogen bond
36.
What kind of bond forms between two nonmetals?
a)
Covalent bond
b)
Ionic bond
c)
Can be either covalent or ionic
d)
Hydrogen bond
37.
What is the name for an ion with a positive charge?
a)
Anion
b)
Cation
c)
Dogion
d)
Ion
38.
What is the name for an ion with a negative charge?
a)
Anion
b)
Cation
c)
Dogion
d)
Ion
39.
What kind of bond forms when atoms share electrons?
a)
Chemical bond
b)
Ionic bond
c)
Covalent bond
d)
Electron bond
40.
What kind of bond forms when one kind of atom gives electrons to another kind of atom?
a)
Chemical bon
b)
Ionic bond
c)
Covalent bond
d)
Electron bond
41.
An ion of copper has a +1 charge; this means
a)
copper gains an electron
b)
copper loses an electron
c)
copper shares and electron
42.
Which of the following is NOT a property of ionic bonds?
a)
high melting point
b)
gains/loses electrons to become stable
c)
brittle
d)
between 2 nonmetals
43.
What happens when you try to mix polar and nonpolar substances
a)
They will react chemically
b)
water and a salt will form
c)
an acid and a base will form
d)
they will not mix
44.
C6H12O6
What are the 6's and the 12?
What are the 6's and the 12?
a)
coefficients
b)
covalents
c)
subscripts
d)
merry rays of sunshine bringing joy into your life :-)
45.
When a molecule shares electrons unequally it is said to be
a)
nonpolar
b)
polar
c)
a penguin
d)
a polar bear
46.
What type of chemical reaction is this one?
Al(OH)3 --> Al2O3 + H2O
Al(OH)3 --> Al2O3 + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
47.
What type of chemical reaction is this one?
CUO + CO2 --> CuCO3
CUO + CO2 --> CuCO3
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
48.
What type of chemical reaction is this one?
Mg + O2 --> MgO
Mg + O2 --> MgO
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
49.
What type of chemical reaction is this one?
Ca + MgCl2 --> CaCl2 + Mg
Ca + MgCl2 --> CaCl2 + Mg
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
50.
Enzymes work by lowering the _______________________ for chemical reactions.
a)
Products
b)
Solutes
c)
Activation Energy
d)
Reactants
51.
Chemical reactions that release energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Reactions
52.
_________________ are the elements and compounds that enter into a chemical reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
53.
The energy needed to start a chemical reaction is the _____________________.
a)
Activation Energy
b)
Products
c)
Reactants
d)
Enzymes
54.
Chemical reactions that absorb energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Explosive
55.
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
56.
Why must chemical equations be balanced?
a)
So that the equation doesn't explode
b)
The reaction won't happen until it is balanced
c)
Matter cannot be created or destroyed
d)
None of these
57.
Which type of reaction starts with a single reactant? (AB --> A + B)
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
58.
How many oxygen atoms are present on the REACTANT side of the equation?
4Fe + 3O2 --> 2Fe2O3
4Fe + 3O2 --> 2Fe2O3
a)
4
b)
2
c)
6
d)
3
59.
A calcium carbonate molecule has 1 calcium atom, 3 oxygen atoms and 1 carbon atom. Which of the following shows the chemical formula for calcium carbonate?
a)
3CaCO
b)
Ca2CO2
c)
CaCO3
d)
CaO2C3
60.
When is the law of conservation of matter true?
a)
all the time
b)
under some conditions, but not others
c)
when energy is given off
d)
only in February
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