AMelamine
BGlycol
CStyrene
DFormaldehyde
Answer:
D. Formaldehyde
Read Explanation:
Bakelite is formed by the condensation of phenol with formaldehyde.
Classification: It is a thermosetting polymer, meaning once it is molded and cross-linked by heating, it hardens permanently and cannot be remelted or reshaped.
Chemical Reaction Type: It is produced through a condensation polymerization reaction (also known as a step-growth polymerization) between phenol and formaldehyde.
Catalysts Used: The reaction can be catalyzed by either an acid or a base.
Acid catalysts typically produce linear chains called Novolac (used in paints and adhesives).
Base catalysts under heat drive extensive three-dimensional cross-linking to produce Bakelite.
Properties and Industrial Uses
Property | Primary Application |
|---|---|
High Electrical Resistance | Used in electrical switches, plugs, sockets, and wire insulation. |
Heat Resistance | Used to make the heat-insulated handles of kitchen utensils, frying pans, and irons. |
Historical Significance | Developed by Leo Baekeland in 1907, it was the world's first fully synthetic plastic. |
