Question 1
Alloys of iron that contain 1.0–1.5% carbon and some manganese, phosphorus, silicon, and sulfur are called
◦ steel.
◦ cast iron.
◦ coke.
◦ pig iron.
◦ hematite.
Question 2
Aluminum hydroxide, Al(OH)
3, is
◦ an acid.
◦ an amphoteric hydroxide.
◦ a base.
◦ an explosive hydroxide.
◦ used to make amalgams.