General Science • ChemistryMedium
Which of the following polymers is classified as a thermosetting plastic that does not soften upon reheating once molded?
A. Bakelite✓ Correct Answer
B. Polythene
C. Polyvinyl chloride
D. Nylon six six
💡 Solution & Explanation
Bakelite is a condensation polymer formed from phenol and formaldehyde, characterized by extensive cross-linking between polymer chains during curing, making it a thermosetting plastic that retains its shape permanently when heated. In contrast, polythene, polyvinyl chloride, and nylon are thermoplastics that soften repeatedly upon heating. Thermosetting polymers find extensive use in electrical switches and handles due to heat resistance.
More General Science Chemistry questions
- In the context of chemical kinetics, what does the molecularity of a reaction represent?
- Which chemical compound is commonly known as 'blue vitriol' and is used as a fungicide and algicide?
- Which of the following polymers is classified as a biodegradable polyester formed by bacterial fermentation…
- During the electrolysis of concentrated aqueous sodium chloride solution, commonly known as the chlor-alkali…
- Which metal is liquid at room temperature and is often used in thermometers?