WorksheetsChemistry Bonding, Chemical Reactions, Acids and Bases Practice
Total questions: 38
Worksheet time: 19mins
Name
Class
Date
1.
When Lavoisier broke water apart into hydrogen and oxygen he was most pleased that the mass of the water was equal to the mass of the two gases created in his reaction. The results of his experiment laid the foundation for what principle?
a)
law of thermal dynamics
b)
law of conservation of energy
c)
law of conservation of mass
d)
the principle of gases
2.
Each substance written to the left of the arrow in a chemical equation is a ____.
a)
reactant
b)
product
c)
precipitate
d)
catalyst
3.
Which of the following compounds does NOT have ionic bonds?
a)
LiF
b)
NaCl
c)
CO2
d)
MgF2
4.
What is the group number for elements that have a stable number of electrons in their outer energy level?
a)
18 (noble gases)
b)
17 (halogens)
c)
2 (alkaline earth metals)
d)
1 (alkali metals)
5.
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 products is sometimes greater.
c)
The mass of reactants is greater.
d)
The masses are always equal.
6.
CH4 + 2O2 → CO2 + 2H2O
This equation models the combustion of methane. What products result?
This equation models the combustion of methane. What products result?
a)
CH4 + 2O2
b)
CO2 + 2H2O
c)
carbon dioxide
d)
methane and water
7.
The combination of symbols that represent the elements in a compound makes up the _______.
a)
chemical formula
b)
chemical equation
c)
chemical symbol
d)
chemical product
8.
If you count the number of atoms in the reactants in the chemical reaction
CH4 + 2O2 → CO2 + 2H2O there are _______________.
CH4 + 2O2 → CO2 + 2H2O there are _______________.
a)
4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
b)
1 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
c)
1 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
d)
4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
9.
When K+ and I- combine, a(n) _________ bond results.
a)
covalent
b)
ionic
c)
metallic
d)
polyatomic
10.
How many atoms of calcium are in a molecule of calcium phosphate whose formula is Ca3(PO4)2?
a)
one
b)
two
c)
three
d)
four
11.
Which statement is true of ionic compounds?
a)
They are electrically neutral when dissolved in water
b)
They are good conductors as solids
c)
They are formed of metals and nonmetals bonded together
d)
They are made by sharing electrons
12.
In the process of ionic bonding, ions come together because
a)
opposite charges repel
b)
positive and negative ions attract
c)
salt is magnetic
d)
like charges attract each other
13.
The maximum number of electrons in the second energy level of an atom is ____.
a)
two
b)
four
c)
eight
d)
ten
14.
How many dots are shown in the electron dot diagram for oxygen, element number 8?
a)
one
b)
six
c)
eight
d)
two
15.
The kind of bond created when atoms share electrons is called ________.
a)
electron bond
b)
covelant bond
c)
ionic bond
d)
metallic bond
16.
Which chemical equation is balanced?
a)
Na + O2 → Na2O
b)
2Na2 + O2 → 2Na2O
c)
2Na + 2O2 → 2Na2O
d)
3Na + O2 → 2Na2O
17.
The energy levels of an atom are occupied by ____.
a)
electrons
b)
protons
c)
neutrons
d)
ions
18.
According to this pH strip, the tested material most likely is __________.
a)
pickle juice
b)
a soda
c)
a cleaning product
d)
water
19.
Aspartame is an artificial sweetener; its formula is C13H16N2O5. Which element in the formula has the largest number of atoms
a)
carbon
b)
hydrogen
c)
nitrogen
d)
oxygen
20.
Dot diagrams are used to represent ____.
a)
protons
b)
outer electrons
c)
atomic mass
d)
the structure of the nucleus
21.
An atom which loses or gains an electron is called a(an) ____________?
a)
proton
b)
isotope
c)
ion
d)
molecule
22.
A balanced chemical equation must have the same number of which of these on both sides of the equation?
a)
molecules
b)
reactants
c)
compounds
d)
atoms
23.
When the pH of a substance becomes more acidic the number on the pH scale
a)
decreases
b)
increases
c)
triples
d)
stays the same
24.
An unknown substance, when tested, turned blue litmus paper red, did not change the color of the red litmus paper, and left the phenolphthalein clear. Based on these tests, what can we know about the unknown substance?
a)
it is a base
b)
it is neutral
c)
is is an acid
d)
it is impossible to identify
25.
Which set of diagrams shows a balanced chemical equation?
a)
A
b)
B
c)
C
d)
D
26.
Bleach, Detergent, Ammonia
What property do these common household substances have in common?
What property do these common household substances have in common?
a)
They all have a pH above 7.
b)
They all are acidic
c)
They all turn litmus paper red.
d)
They all taste sour.
27.
A solution with a pH of 13 is a ____.
a)
weak acid
b)
weak base
c)
strong acid
d)
strong base
28.
If a solution is acidic, it can be neutralized by adding
a)
a strong acid
b)
heat
c)
a weaker acid
d)
a base
29.
How does a solution with a pH of 2 compare to a solution with a pH of 5?
a)
The pH 2 solution is a weaker acid.
b)
The pH 2 solution is a stronger acid.
c)
The pH 2 solution is a weaker base.
d)
The pH 2 solution is a stronger base.
30.
A solution was found to have a pH of 8.5. What does this indicate about the substance?
a)
It is a weak acid
b)
It is a strong acid
c)
It is a weak base
d)
It is a strong base
31.
Which of the following properties is NOT characteristic of acidic solutions?
a)
has a sour taste
b)
conducts electricity
c)
feels slippery
d)
is corrosive to certain metals
32.
N2 O2 CO2 H2O
This lists the most common gases in the atmosphere. Which of these substances is NOT on the list.
This lists the most common gases in the atmosphere. Which of these substances is NOT on the list.
a)
oxygen
b)
hydrogen
c)
nitrogen
d)
carbon dioxide
33.
2NaOH + 3HCl → 2H2O + 2NaCl
How many sodium atoms are present on the reactant side?
How many sodium atoms are present on the reactant side?
a)
one
b)
two
c)
three
d)
four
34.
2NaOH + 3HCl → 2H2O + 2NaCl
How many hydrogen atoms are present on the reactant side of the equation?
How many hydrogen atoms are present on the reactant side of the equation?
a)
five
b)
two
c)
three
d)
four
35.
2NaOH + 3HCl → 2H2O + 2NaCl
How many sodium atoms are present on the product side of the equation?
How many sodium atoms are present on the product side of the equation?
a)
five
b)
two
c)
three
d)
four
36.
2NaOH + 3HCl → 2H2O + 2NaCl
How many hydrigen atoms are present on the product side of the equation?
How many hydrigen atoms are present on the product side of the equation?
a)
five
b)
two
c)
three
d)
four
37.
2NaOH + 3HCl → 2H2O + 2NaCl
Using the information from questions 33-36, is this equation balanced?
Using the information from questions 33-36, is this equation balanced?
a)
yes
b)
no
38.
Which one of the following Lewis dot structures is correct for chlorine?
a)
Cl with 8 dots
b)
Cl with no dots
c)
Cl with 6 dots
d)
Cl with 7 dots
100 %
