3. Answer the following.
a. Thermocol is produced from which material
b. Write uses of PVC.
c. Write the natural or manmade raw
material of the following items.
Mattress, beaker, bangle, chair, gunny bag, broom, knife, pen.
d. Which are the main ingredients of glass?
e. How the plastic is produced?
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Answer:
a) Thermocol contains an important thermoplastic compound, called polystyrene which is obtained by the polymerisation of styrene or phenylethene. The chemical properties of phenylethene are identical to polyethene. It responds very slowly to bacterial decomposition in the soil, thus making the soil infertile b)Economical, versatile polyvinyl chloride (PVC, or vinyl) is used in a variety of applications in the building and construction, health care, electronics, automobile and other sectors, in products ranging from piping and siding, blood bags and tubing, to wire and cable insulation, windshield system components and more.
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