WorksheetsChemical Reactions, Equations, Acids & Bases
Total questions: 66
Worksheet time: 43mins
Name
Class
Date
1.
What type of bond requires an element gain or lose electrons?
a)
Ionic Bond
b)
Covalent Bond
c)
Numerical Bond
d)
Metallic Bond
2.
What type of bond shares electrons?
a)
Ionic Bond
b)
Covalent Bond
c)
Numerical Bond
d)
Metallic Bond
3.
Is Hydrogen considered a metal or a non-metal?
a)
Metal
b)
Non-metal
4.
Are the atoms more stable when they are bonded together or when they are apart?
a)
Bonded Together
b)
Apart
5.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons
c)
The transfer of electrons
d)
None Of the above
6.
What happens when the sodium atom loses an electron?
a)
It become negatively charged
b)
It become positively charged
c)
none
7.
The charged particle that is formed when an atom gains or loses valence electrons is a(an):
a)
ion
b)
catalyst
c)
electrolyte
d)
molecule
8.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
9.
How many electrons do atoms need to be stable?
a)
1
b)
2
c)
6
d)
8
10.
How many valence electrons do elements in Group 1, the Alkali Metals, have?
a)
1
b)
2
c)
6
d)
7
11.
How many valence electrons do elements in Group 2, the Alkaline Earth Metals, have?
a)
1
b)
2
c)
6
d)
7
12.
Which of the following is an example of an IONIC COMPOUND?
a)
NaCl
b)
H2O
c)
CO2
d)
NO
13.
Which of the following is an example of a COVALENT COMPOUND?
a)
H2S
b)
KI
c)
CaCl2
d)
MgO
14.
Covalent bonds are formed by sharing an electron from a _______ to a ________.
a)
Metal to a metalloid
b)
Metalloid to a nonmetal
c)
Nonmetal to a nonmetal
d)
Metal to a nonmetal
15.
The number of _____ is most important in determining how an atoms will bond.
a)
Neutrons
b)
Protons
c)
Valence Electrons
d)
Electron sin the innermost shell
16.
How many valence electrons are in Phosphorus?
a)
15
b)
4
c)
5
d)
31
17.
How many valence electrons does nitrogen have?
a)
3
b)
2
c)
5
d)
1
18.
What are the products of the chemical reaction pictured?
a)
CH4 and CO2
b)
CH4 and O2
c)
CO2 and H2O
d)
O2 and H2O
19.
Consider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
20.
What is the left part of a chemical equation called?
H2 + O → H2O
H2 + O → H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
21.
What is the right part of a chemical equation called?
H2 + O → H2O
H2 + O → H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
22.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
23.
Identify the reactant(s) and product(s) of the reaction.
a)
All three are reactants and none are products.
b)
Hydrogen and water are the reactants, and oxygen is the product.
c)
Water and oxygen are the reactants, and hydrogen is the product.
d)
Hydrogen and oxygen are the reactants, and water is the product.
24.
In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.
a)
reactants
b)
products
c)
neutrals
d)
energizers
25.
Chemical formulas and symbols that represent a chemical reaction.
a)
Chemical Change
b)
Physical Change
c)
Chemical Equation
d)
Chemical Reaction
26.
Which of the following always results from a chemical reaction?
a)
Fire
b)
Bubbles
c)
A new substance that is a solid
d)
A new substance that can be a solid, liquid, or gas
27.
What happens when chemical bonds break and new bonds form?
a)
a physical change
b)
a chemical reaction
c)
matter is destroyed
d)
surface area increases
28.
The only sure evidence for a chemical reaction is
a)
the formation of a gas.
b)
a color change.
c)
the production of one or more new substances.
d)
changes in properties.
29.
A chemical reaction that absorbs energy in the form of heat is described as
a)
endothermic
b)
exothermic
c)
combustion
d)
unbalanced
30.
What type of reaction is occurring in the diagram? Which response below explains the reason for that type of reaction?
a)
Exothermic. Heat is released when the candle (wax) burns.
b)
Endothermic. Heat is released when the candle (wax) burns.
c)
Exothermic. Heat is taken in when the candle (wax) burns.
d)
Endothermic. Heat is taken in when the candle (wax) burns.
31.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
bubbles of gas appear
d)
dissolving
32.
After you mix two substances together, a new substance forms. This is an example of:
a)
Physical Change
b)
Chemical Change
33.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
34.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
35.
When iron nails get rusty, heat is released. What process is this?
a)
Exothermic
b)
Endothermic
36.
If a substance has a pH of 10 it is considered
a)
Acidic
b)
Basic
c)
Neutral
37.
Acids produce _________ ions when they break down or dissocciate.
a)
Hydroxide (OH-)
b)
Water
c)
Chlorine (Cl-)
d)
Hydronium (H3O+)
38.
When found in food, acids are ________
a)
Sour
b)
Bitter
c)
Salty
d)
Slippery
39.
What color does acid turn litmus paper?
a)
It turns litmus paper purple.
b)
It turns red litmus paper blue.
c)
It turns blue litmus paper blue.
d)
It turns blue litmus paper red.
40.
What color does bases turn litmus paper?
a)
It turns litmus paper purple.
b)
It turns blue litmus paper red.
c)
It turns red litmus paper blue.
d)
It turns red litmus paper re
41.
What are properties of a base?
a)
Slippery, bitter, does not react with metals, pH above 7.
b)
Slippery, bitter, reacts with metals, pH below 7.
c)
Sour, reacts with metals, pH below 7
d)
Sour, reacts with metals, pH above 7.
42.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
43.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
44.
Which of the following substances would have the greatest concentration of H3O+ ions?
a)
Ammonia with
pH 13
b)
Water with
pH 7
c)
Milk with
pH 5
d)
Lemon juice with
pH 2
45.
If an acid has a pH of 1.4 will it be strong or weak?
a)
strong
b)
weak
46.
Which of the following represents the chemical formula for hydronium?
a)
H2O
b)
H+
c)
H3O+
d)
OH-
47.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
48.
Drain cleaner has a pH of 13. What is drain cleaner?
a)
An acid.
b)
A strong base.
c)
Neutral.
d)
A weak base.
49.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
50.
You mix two chemicals in a beaker. If the reaction was endothermic, the beaker would feel _______.
a)
Warm
b)
Cold
51.
In an endothermic reaction, heat is...
a)
taken in
b)
given out
52.
A neutralisation reaction is a reaction between
a)
Acid and a Base
b)
Acid and water
c)
Base and water
d)
None of the above
53.
Substance that breaks into hydroxide (OH-) ions in water
a)
Base
b)
Neither
c)
Acid
54.
Scale that measures how acidic or basic a solution is.
a)
pH scale
b)
pOH scale
c)
Acid Base Indicator
55.
A pH of 0 - 6 indicates a(n)
a)
Acid
b)
Base
56.
A pH of 8 -14 indicates a
a)
Base
b)
Acid
57.
pH level of 7 indicates
a)
acid
b)
base
c)
neutral
58.
Which of the following is a pH for a strong base?
a)
1
b)
8
c)
7
d)
13
59.
Which of the following is a pH for a strong acid?
a)
1
b)
6
c)
7
d)
13
60.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
61.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide (O2)
b)
oxygen (O)
c)
hydrogen (H+)
d)
hydroxide (OH-)
62.
The following reaction shows a(n):
a)
Base
b)
Neutral substance
c)
Acid
63.
The following reaction shows a(n):
a)
Base
b)
Neutral substance
c)
Acid
64.
Look at the periodic table that is provided. What color are the metals?
a)
Blue
b)
Yellow
c)
Red
65.
Look at the periodic table that is provided. What color are the nonmetals?
a)
Blue
b)
Red
c)
Yellow
66.
Look at the periodic table that is provided. What color are the metalloids?
a)
Blue
b)
Red
c)
Yellow
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