152. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
153. __________ is produced by polymerisation of chloroprene.
154. Pick out the wrong statement regarding the solubility characteristics of high polymers.
155. Ebonite is a/an
156. Elastomers are
157. Which of the following additives are added to plastics to make it impervious to X-rays ?
158. Paper like thin plastic articles can be produced by
159. Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
160. Benzoyl chloride is not used as a catalyst in the manufacture of
161. Epoxy resin is a polymer containing two or more groups called epoxide group or ethoxyline group. It is a
162. The conversion of caprolactum in the above case is about __________ percent.
163. Polycaprolactum is also known as
164. __________ scrap can be recycled & reutilised.
165. All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic
166. Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
167. Bakelite is a/an
168. Polyvinyl alcohol is used as a
169. Epoxy resins (i.e., epoxide polymers)
170. Which of the following is the lowest cost plastic commercially available ?
171. Terylene is a/an
172. Rayon is a __________ fibre.
173. Commercial production of polypropylene employs __________ polymerisation.
174. Bakelite (phenol-formaldehyde) resin can not be used as
175. ചിത്രകലയെ പരിപോഷിപ്പിച്ച മുഗൾ ചക്രവർത്തി ആരായിരുന്നു?