1. Condensation polymerisation of __________ produces bakelite.
2. Polymethyl methacrylate, which is an acrylic resin, is also called
3. Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.
4. __________ scrap can be recycled & reutilised.
5. Lavatory cisterns are normally made of
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