Section 4.1
The Variety of Compounds
Practice Test
1.
Molten sodium chloride conducts electricity because ______________________.
a.
the chlorine atoms carry a charge
b.
chlorine gas escapes
c.
the ions are free to move
d.
solid sodium conducts, too
Hint
2.
Green plants take in this gas and give off oxygen during photosynthesis.
a.
ammonia
b.
carbon dioxide
c.
hydrogen
d.
nitrogen
Hint
3.
Carbon dioxide is __________ in water.
a.
blue
b.
insoluble
c.
a solid
d.
soluble
Hint
4.
These two elements combine to form water.
a.
carbon and hydrogen
b.
carbon and oxygen
c.
hydrogen and chlorine
d.
hydrogen and oxygen
Hint
5.
In an ionic crystal, these attract each other.
a.
negative ions
b.
positive ions
c.
positive and negative atoms
d.
positive and negative ions
Hint
6.
This compound is commonly found in all three states of matter on Earth's surface.
a.
carbon dioxide
b.
iron oxide
c.
sodium chloride
d.
water
Hint
