Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
Correct answer: D. Bakelite
- A. Nylon 66
- B. urotropine
- C. Aniline formaldehyde plastic
- D. Bakelite
Explanation
Phenol and formaldehyde undergo acid-catalysed condensation, forming phenol-formaldehyde resin, commonly called Bakelite after curing. The likely mistake is choosing urotropine, which is formed from formaldehyde and ammonia, not from formaldehyde and phenol.
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About Polymers
Polymers are large molecules made from repeating monomer units joined by covalent bonds. The topic distinguishes addition polymers such as polyethylene, PVC and polystyrene from condensation polymers such as nylon and polyester, and relates chain structure to thermoplastics, thermosetting polymers, elastomers, properties, uses and environmental concerns.
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