Nuclear Chemistry
Practice Test
1.
Cells store energy by forming this compound.
a.
ATP
b.
stearic acid
c.
sucrose
d.
acetone
2.
The maximum energy reached during a reaction's uncatalyzed pathway is ______________ the maximum energy reached during its catalyzed pathway.
a.
greater than
b.
slightly less than
c.
equal to
d.
much less than
3.
An __________ atom is at the center of the hemoglobin molecule.
a.
copper
b.
iron
c.
carbon
d.
nitrogen
4.
The typical maximum efficiency of a coal-fired power plant is ______________.
a.
less than 40%
b.
between 50% and 60%
c.
between 60% and 70%
d.
greater than 70%
5.
_____________ function as biological catalysts, make up your muscles and tendons, and help transport substances in your blood.
a.
Esters
b.
Proteins
c.
Sugars
d.
Carbohydrates
6.
An instant cold pack utilizes an _____________________ reaction.
a.
exothermic combustion
b.
exothermic synthesis
c.
endothermic combustion
d.
endothermic dissolution
7.
Plants appear green because their leaves _____________.
a.
reflect red and blue light
b.
absorb green and yellow light
c.
reflect green and yellow light
d.
reflect UV light
8.
Radioactivity is the spontaneous emission of radiation by a/an ________________.
a.
stable electron
b.
hydrogen bond
c.
covalent bond
d.
unstable atomic nucleus
9.
________________ have the prefixes cis- and trans-.
a.
Di- and Tri- isomers
b.
Geometric isomers
c.
Stereoisomers
d.
Structural isomers
10.
In an ionizing smoke detector, smoke particles interfere with the flow of ions created by _____________ from americium-241.
a.
electrons
b.
gamma rays
c.
atoms
d.
alpha particles
11.
If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?
a.
2
b.
16
c.
8
d.
4
12.
In photosynthesis, ________________ are formed.
a.
fructose and nitrogen
b.
glucose and carbon dioxide
c.
glucose and oxygen
d.
sucrose and water
13.
These devices produce most artificial elements.
a.
fission reactors
b.
centrifuges
c.
particle accelerators
d.
fusion reactors
14.
In Einstein's famous equation E = mc
2
, which relates energy and mass, c represents the ___________________.
a.
speed of sound
b.
caloric content
c.
specific heat
d.
speed of light
15.
Any time energy is produced or is converted from one form to another, some is lost as _________.
a.
mass
b.
heat
c.
hydrogen and oxygen
d.
temperature
16.
____________ plastics harden permanently when molded.
a.
Thermosetting
b.
Polymer
c.
Thermoplastic
d.
Monomer
17.
What is the difference between an aldehyde and a ketone?
a.
Aldehydes have carbonyl groups; ketones have carboxyl groups.
b.
Aldehydes have carbonyl groups at the end of a carbon chain; ketones have carbonyl groups within carbon chains.
c.
Aldehydes have carboxyl groups; ketones have carbonyl groups.
d.
Aldehydes have carboxyl groups at the end of a carbon chain; ketones have carboxyl groups within carbon chains.
18.
____________ containing radioactive P-32 have been used to help clarify complex metabolic pathways.
a.
U-235 atoms
b.
Fusion reactors
c.
Tracers
d.
Protons
19.
In this process, cells generate glucose anaerobically.
a.
respiration
b.
oxidation
c.
glycolysis
d.
fermentation
20.
______________ gives additional strength to a polymer.
a.
Boiling
b.
Single bonding
c.
Cross-linking
d.
Ionic bonding
