A Both assertion and reason are correct, reason is correct explanation of assertion Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses B Both assertion and reason are correct, reason is not the correct explanation of assertion No worries! We‘ve got your back. Try BYJU‘S free classes today! C Assertion is correct but reason is incorrect. No worries! We‘ve got your back. Try BYJU‘S free classes today! D Assertion is incorrect but reason is correct. No worries! We‘ve got your back. Try BYJU‘S free classes today!
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Solution The correct option is A Both assertion and reason are correct, reason is correct explanation of assertion Bakelite is composed of phenol and formaldehyde, so it is a copolymer. Copolymers are those that are composed of two different monomer units. Bakelite is heavily branched polymer, thus it is a thermosetting material
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I'm a materials science enthusiast with a deep understanding of polymers and plastics. My knowledge extends to the composition, properties, and applications of various polymers. Let's delve into the concepts mentioned in the article about Bakelite and its characteristics.
The article discusses Bakelite, a polymer composed of phenol and formaldehyde, making it a copolymer. Copolymers are polymers formed from two different monomer units. Bakelite, being a heavily branched polymer, falls into the category of thermosetting materials.
Now, let's address the questions posed in the article:
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Which of the two is a thermosetting plastic: PVC or Bakelite?
- Bakelite is a thermosetting plastic.
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Choose the thermoplastics and thermosetting plastics from the following: Melamine, Polythene, Bakelite, Polyvinyl chloride.
- Thermoplastics: Polythene
- Thermosetting plastics: Bakelite
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Assertion: Bakelite is a thermosetting polymer. Reason: Bakelite can be melted again and again without any change.
- The assertion is correct. Bakelite is a thermosetting polymer, but the reason is incorrect. Thermosetting plastics cannot be melted again and again without any change.
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Assertion: Bakelite is the first completely synthesized thermoplastic. Reason: Thermosetting plastics are harder.
- The assertion is incorrect. Bakelite is a thermosetting polymer, not a thermoplastic. The reason is correct; thermosetting plastics are indeed harder.
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Assertion: Bakelite is a thermosetting polymer. Reason: On heating, the polymeric chain becomes a long and straight chain.
- The assertion is correct. Bakelite is a thermosetting polymer. The reason is incorrect; on heating, the polymeric chain in thermosetting polymers does not become a long and straight chain.
Feel free to ask if you have any further questions or if you'd like more information on specific aspects of polymers and plastics!
