Chapter 18:
Chemical Reactions
Practice Test
1.
Which of the following is an example of a chemical reaction?
a.
burning a newspaper
b.
ice melting to form water
c.
cutting up a newspaper
d.
All of the above.
Hint
2.
What element is used in the process of galvanizing steel?
a.
zinc
b.
magnesium
c.
aluminum
d.
iron
Hint
3.
Which enzyme found in saliva helps break down starch into sugar?
a.
trypsin
b.
amylase
c.
pepsin
d.
lipase
Hint
4.
How does an inhibitor affect a chemical reaction?
a.
An inhibitor slows down a chemical reaction.
b.
An inhibitor decreases the amount of energy released by reaction.
c.
An inhibitor speeds up the reaction but remains unchanged.
d.
An inhibitor speeds up a chemical reaction.
Hint
5.
How does a catalyst affect a chemical reaction?
a.
A catalyst increases the amount of energy released by the reaction.
b.
A catalyst speeds up the reaction but remains unchanged.
c.
A catalyst decreases the speed of a chemical reaction and is unchanged.
d.
A catalyst speeds up a chemical reaction and is consumed.
Hint
6.
What chemical reaction is involved in space travel?
a.
citric acid + ammonium hydroxide → ammonium citrate + water
b.
hydrogen peroxide → oxygen + water
c.
carbonic acid + calcium carbonate → calcium hydrogen carbonate
d.
liquid hydrogen + liquid oxygen → water + energy
Hint
7.
Which of the following statements regarding ozone is correct?
a.
The ozone layer absorbs ultraviolet rays from the sun.
b.
Ozone is a product of a reaction between light and oxygen in the atmosphere.
c.
Ozone damages plants and reacts with body tissue in a harmful way.
d.
All of the above.
Hint
8.
How do catalytic converters deal with automobile exhaust?
a.
The converter filters harmful substances out of the exhaust.
b.
The converter changes harmful gases to platinum, palladium, and rhodium.
c.
The converter reacts with harmful gases and neutralizes them.
d.
The converter speeds up the reaction of oxygen with harmful gases.
Hint
9.
Which of the following is an example of a chemical reaction inside you?
a.
digestion
b.
respiration
c.
growing teeth and bones
d.
All of the above.
Hint
10.
Which of the following reactions is classified as exothermic?
a.
photosynthesis
b.
ozone production in the stratosphere
c.
growing teeth and bones
d.
All of the above.
Hint
11.
In the presence of water, oxygen in the air chemically reacts with iron to form what compound?
a.
steel
b.
carbon dioxide
c.
iron sulfide
d.
rust
Hint
12.
Which of the following word equations represents a typical acid-base reaction?
a.
salt → acid + base
b.
acid → salt + water
c.
acid + base → salt + water
d.
acid → base + water
Hint
13.
Which of the following reactions may be classified as endothermic?
a.
liquid hydrogen + liquid oxygen → water + energy
b.
aluminum oxide + energy → aluminum + oxygen
c.
aluminum + oxygen → aluminum oxide + energy
d.
All of the above.
Hint
14.
What chemical reaction is commonly involved in cave formation?
a.
carbonic acid + calcium carbonate → calcium hydrogen carbonate
b.
liquid hydrogen + liquid oxygen → water + energy
c.
hydrogen peroxide → oxygen + water
d.
citric acid + ammonium hydroxide → ammonium citrate + water
Hint
15.
Which of the following describes the corrosion of iron to rust?
a.
The products iron and oxygen produce the reactant iron oxide.
b.
The reactant iron and oxygen produce the product iron oxide.
c.
The reactants iron and oxygen are produced by iron oxide.
d.
The products iron and oxygen are produced by iron oxide.
Hint
