Classify the following into thermosetting and thermoplastics-
combs, bakelite, melamine, toys.
Thermosetting plastics – bakelite, melamine
Thermoplastics – combs, toys
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- Choose the thermoplastics and thermosetting plastics from the following: Melamine, Polythene, Bakelite, Polyvinyl chloride
- Explain the difference between thermoplastics and thermosetting plastics.
- (a) What are thermoplastics? Give two examples of thermoplastics.(b) What are thermosetting plastics? Give two examples of thermosetting plastics.
- Classify the following into good conductors, resistors and insulators:Rubber, Mercury, Nichrome, Polythene, Aluminium, Wood, Manganin, Bakelite, Iron, Paper, Thermocol, Metal coin
- Which of the two is a thermosetting plastic: PVC or bakelite?
- Which of the following are thermosetting polymers?(A) Melamine (B) Terylene (C) Polythene (D) BakeliteA and BB and CA and DB and D
- Which of the following plastics is used for making electric switches?A. Teflon B. melamine C. PET D. Bakelite
- Classify the following into acidic oxides and basic oxides:Na2O, SO2, MgO, CO2
- Classify the following salts into acidic, basic and neutral:Ammonium chloride, Sodium carbonate, Sodium chloride, Potassium sulphate.
- The non-stick coating on frying pans is that of a plastic called:A. polyvinyl chloride B. melamine C. bakelite D. Teflon
- PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?
- Classify the following into true solutions and colloidal solutions :Ink, Salt solution, Starch solution, Blood, Sugar solution
- Classify the following into elements and compounds :(i) H2O(ii) He(iii) Cl2(iv) CO(v) Co
- The plastic which is coated on the uniforms of firemen to make them fire-resistant is:A. Bakelite B. polythene C. Teflon D. melamine
- Classify the substances given in Fig. 2.2 into elements and compounds."
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