The Chemistry of Life
Practice Test
1.
These lipids include cholesterol, some sex hormones, and vitamin D.
a.
oleic acids
b.
steroids
c.
sucrose polymers
d.
stearic acids
2.
The general formula for an amine is __________.
a.
RX
b.
ROR'
c.
RNH2
d.
ROH
3.
What is the shape of the benzene molecule?
a.
hexagonal planar
b.
trigonal pyramidal
c.
tetrahedral
d.
octahedral
4.
What is the molar mass of arsenic?
a.
74.9 g/mol
b.
74.9 u/mol
c.
33 kg/mol
d.
33 lb/mol
5.
________________ have the prefixes cis- and trans-.
a.
Structural isomers
b.
Di- and Tri- isomers
c.
Geometric isomers
d.
Stereoisomers
6.
H
2
O is most dense at __________.
a.
0
o
C
b.
32
o
F
c.
277 K
d.
-32 K
7.
What is the mass of 0.100 mol of sodium chloride?
a.
0 g
b.
0.355 g
c.
10.0 g
d.
0.585 g
8.
The sum of all the chemical reactions necessary for the life of an organism is its ____________.
a.
metabolism
b.
digestion
c.
respiration
d.
locomotion
9.
What volume of HCl at STP can be produced by the reaction of 12.0 L of hydrogen and 24.0 L of chlorine, both at STP?
a.
36.0 L
b.
100.0 L
c.
12.0 L
d.
24.0 L
10.
Calculate the mass in grams of 0.0790 moles of aluminum.
a.
1.0 g
b.
2.1 g
c.
34 g
d.
21 g
11.
What is the monomer in the natural polymer known as cellulose?
a.
methanol
b.
ribose
c.
sucrose
d.
glucose
12.
Water forms ______________ in a glass tube.
a.
a concave meniscus
b.
hydrogen and oxygen
c.
a convex meniscus
d.
heavy water
13.
A shared pair of electrons is called ___________________.
a.
a covalent bond
b.
compound
c.
an ionic bond
d.
an energy level
14.
____________ plastics harden permanently when molded.
a.
Thermosetting
b.
Monomer
c.
Polymer
d.
Thermoplastic
15.
Regarding solvents and solvents, ________________.
a.
like dissolves like
b.
nonpolar solvents dissolve polar solutes
c.
solutes dissolve solvents
d.
polar solvents dissolve nonpolar solutes
16.
More than 95% of the atoms in your body are these four elements.
a.
oxygen, carbon, hydrogen, and nitrogen
b.
iron, phosphorus, carbon, and hydrogen
c.
oxygen, hydrogen, calcium, and carbon
d.
hydrogen, iron, silicon, and oxygen
17.
What is the product of an endothermic reaction in which an inorganic phosphate group is added to adenosine diphosphate?
a.
ATP
b.
lactic acid
c.
ADP
d.
glucose
18.
A mystery compound dissolves in water to produce a solution that does not conduct electricity. The compound cannot be __________.
a.
ethanol
b.
benzene
c.
butane
d.
sodium chloride
19.
What is the molarity of a solution prepared by dissolving 50.0 g of NaCl to make 500.0 mL of solution?
a.
1.71 M
b.
0.855 M
c.
1.17 M
d.
0.100 M
20.
Alkanes with 20 or more carbon atoms are __________ at room temperature and pressure.
a.
gases
b.
solids
c.
fluids
d.
liquids
