PDF chapter test TRY NOW
Give brief answers to the following questions:
1. 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?
The significant difference is that thermosetting plastics cannot be on heating if once moulded. On the other hand, thermoplastics, while heated, get deformed.
Examples of the plastic are given below-
Thermoplastic - PVC and .
Thermosetting plastic - and Bakelite.
2. Unscramble the jumbled words given below, related to synthetic materials.
(a). anory = Rayon (b). lopmery = (c). relyteen =
(d). laspict = (e). yespolter = (f). felton
(d). laspict = (e). yespolter = (f). felton
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