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WorksheetsChapter 2 Practice Test
Total questions: 22
Worksheet time: 44mins
Name
Class
Date
1.
The three particles that make up atoms are
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
2.
If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number would be
a)
3
b)
4
c)
7
d)
11
3.
Isotopes are atoms of the same element with the same number of protons and
a)
a different number of electrons
b)
a different number of molecules
c)
a different number of neutrons
d)
the same number of neutrons
4.
Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?
a)
compound
b)
isotope
c)
nucleus
d)
enzyme
5.
What type of electron is available to form bonds?
a)
valence
b)
nucleus
c)
ionic
d)
covalent
6.
The most abundant compound in most living things is
a)
carbon dioxide
b)
water
c)
sodium chloride
d)
sugar
7.
In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a result, the oxygen atom is
a)
slightly negative
b)
very negative
c)
slightly positive
d)
very positive
8.
When salt is dissolved in water, water is the
a)
reactant
b)
solution
c)
solute
d)
solvent
9.
If the pH of stomach acid and of oven cleaner were measured,
a)
both would be below 7
b)
both would be above 7
c)
the pH of stomach acid would be above 7, but the pH of oven cleaner would be below 7
d)
the pH stomach acid would be below 7, but the pH of oven cleaner would be above 7
10.
Amino acid is to protein as
a)
fat is to lipid
b)
DNA is to RNA
c)
sugar is to fat
d)
simple sugar to starch
11.
Which of the following is NOT a monomer
a)
a glucose molecole
b)
an amino acid
c)
nucleotide
d)
a protein
12.
Which statement is true?
a)
simple sugars are made of polysaccharides
b)
glycerol is made of fatty acids
c)
RNA molecules are made of nucleotides
d)
amino acids are made of proteins
13.
When hydrogen and oxygen combine to form water, water is
a)
a product
b)
a reactant
c)
both a product and a reactant
d)
neither a product or a reactant
14.
What is the process that changes one set of chemicals into a another set of chemicals?
a)
cohesion
b)
adhesion
c)
chemical reaction
d)
dissolving
15.
Chemical reactions that release energy
a)
will not occur
b)
will never explode
c)
will always explode
d)
often occur spontaneously
16.
Which of the following is a form of energy that may be released during a chemical reaction?
a)
heat
b)
sound
c)
light
d)
all of the above
17.
A substance that accelerates the rate of a reaction is called a(n)
a)
catalyst
b)
lipid
c)
molecule
d)
element
18.
Carbohydrates contain large amounts of Carbon, Hydrogen, Nitrogen.
a)
true
b)
false
19.
Adhesion is responsible for the surface of water in a graduated cylinder that is slightly curved at the sides
a)
true
b)
false
20.
Buffers are weak acids or bases that can react with strong acids or bases to prevent sudden changes in pH
a)
true
b)
false
21.
Polysaccharides are formed through a process known as polymerization
a)
true
b)
false
22.
Proteins that speed up the rate of chemical reactions in a cell without requiring high temperatures are antibodies
a)
true
b)
false
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