MediumChemistry
Which of these substances are white paint pigments?
TL;DR
Options 2, 4, and 5: titanium dioxide, aluminium hydroxide, and zinc oxide.
Question
Select one or more substances used as white paint pigments.
Answer choices
- Lake pigment.
- Titanium dioxide.
- Aluminium.
- Hydrated aluminium oxide.
- Zinc oxide.
Explanation
Titanium dioxide (TiO₂) and zinc oxide (ZnO) are known as titanium white and zinc white. Hydrated aluminium oxide, or aluminium hydroxide (Al(OH)₃), is also used as a white pigment or filler, although its hiding power differs from that of TiO₂.
Metallic aluminium produces a silvery metallic effect. In this list, a lake pigment is a coloured pigment. The expected choices are therefore 2, 4, and 5.
