Podcast
Questions and Answers
What is the effect of long exposure to air and sunlight on plastic articles containing chlorinated paraffin wax?
What is the effect of long exposure to air and sunlight on plastic articles containing chlorinated paraffin wax?
- They become hard and brittle (correct)
- They become soft and flexible
- They remain unchanged
- They become more soluble in organic solvents
Which type of polymers are formed by addition reaction?
Which type of polymers are formed by addition reaction?
- Condensation polymers
- Thermoplastic polymers
- Thermosetting polymers
- Addition polymers (correct)
What is a characteristic of thermoplastic polymers?
What is a characteristic of thermoplastic polymers?
- They become hard on heating
- They are insoluble in organic solvents
- They have three-dimensional cross-linked structures
- They can be remoulded and reshaped (correct)
What is the molecular mass of condensation polymers?
What is the molecular mass of condensation polymers?
What is the characteristic of thermosetting polymers in terms of solubility?
What is the characteristic of thermosetting polymers in terms of solubility?
What is the reason for thermoplastics becoming brittle on long exposure to air and sunlight?
What is the reason for thermoplastics becoming brittle on long exposure to air and sunlight?
What is the characteristic of high density polyethene?
What is the characteristic of high density polyethene?
What is the name of the polymer obtained by condensation copolymerization of terephthalic acid with 1, 4-diaminobenzene?
What is the name of the polymer obtained by condensation copolymerization of terephthalic acid with 1, 4-diaminobenzene?
What type of polymer is used to make baby-feed bottles and fridge containers?
What type of polymer is used to make baby-feed bottles and fridge containers?
What is the characteristic of carry bags made of low density polyethene?
What is the characteristic of carry bags made of low density polyethene?
What is the primary reason for the softening of thermoplastic polymers when heated?
What is the primary reason for the softening of thermoplastic polymers when heated?
What is the characteristic of thermosetting polymers when heated?
What is the characteristic of thermosetting polymers when heated?
What is the role of plasticizers in polymers?
What is the role of plasticizers in polymers?
What is the characteristic of thermoplastic polymers?
What is the characteristic of thermoplastic polymers?
Why do thermosetting polymers become hard and infusible when heated?
Why do thermosetting polymers become hard and infusible when heated?
What type of polymer is formed when a single type of monomer is used in the polymerisation process?
What type of polymer is formed when a single type of monomer is used in the polymerisation process?
Which of the following copolymers is formed by the polymerisation of vinyl chloride with vinylidene chloride?
Which of the following copolymers is formed by the polymerisation of vinyl chloride with vinylidene chloride?
What is the characteristic of a copolymer formed by the polymerisation of two or more different monomers?
What is the characteristic of a copolymer formed by the polymerisation of two or more different monomers?
What is the result of copolymerisation of monomer mixtures?
What is the result of copolymerisation of monomer mixtures?
What is an example of a homopolymer formed from a single type of monomer?
What is an example of a homopolymer formed from a single type of monomer?
What is the main difference between addition polymers and condensation polymers?
What is the main difference between addition polymers and condensation polymers?
Which type of polymer is characterized by a three-dimensional network structure?
Which type of polymer is characterized by a three-dimensional network structure?
What is the likely reason for the low tensile strength of branched chain polymers?
What is the likely reason for the low tensile strength of branched chain polymers?
Which of the following polymers is an example of a condensation polymer?
Which of the following polymers is an example of a condensation polymer?
What is the typical characteristic of branched chain polymers?
What is the typical characteristic of branched chain polymers?
What type of intermolecular forces are present in elastomers?
What type of intermolecular forces are present in elastomers?
What is a characteristic of fibres?
What is a characteristic of fibres?
What happens to thermoplastics when heated?
What happens to thermoplastics when heated?
What is a key difference between elastomers and fibres?
What is a key difference between elastomers and fibres?
What is a characteristic of thermoplastic polymers?
What is a characteristic of thermoplastic polymers?
