Question Detail Contact lenses are made from ? Polyvinyl chlorideTeflonPolystyreneLucite Answer: Option A Similar Questions : 1. Which is not a type of elements ? MetalsNon MetalsMetalloidsGases Answer: Option D 2. Oxides of metals are alkaline. TRUEFALSE Answer: Option A 3. What is extracted from Bauxite ? MicaAluminiumCopperTin Answer: Option B 4. The aqueous solution of which acids is called Vinegar ? Acetic acidHydrochloric acidCitric acidOxalic acid Answer: Option A 5. Chemical used in photography is sodium sulphatesodium sulphitesodium thiosulphatesodium oxalate Answer: Option C Read more from - Chemistry Questions Answers