| 221. | Which plastic is used to pack food items? |
A. poly vinyl chloride | |
B. poly propylene | |
C. poly ethylene | |
D. tetrafluoro ethane |
| 222. | Telephone receivers and radio and television cabinets are made of |
A. teflon | |
B. Bakelite | |
C. Veetal | |
D. glyptal |
| 223. | What is Wax? |
A. ester | |
B. Salt | |
C. aldehyde | |
D. salts |
| 224. | Lac is a – |
A. natural anamorphism | |
B. natural polymers | |
C. synthetic polymers | |
D. None of these |
| 225. | Artificial silk also has the following name |
A. rayon | |
B. dacron | |
C. fiberglass | |
D. Nylon |
| 226. | The first man-made artificial fiber was |
A. rayon | |
B. Nylon | |
C. polyester | |
D. terrycoat |
| 227. | The raw material used to make nylon is |
A. Ethylene | |
B. adipic acid | |
C. urea | |
D. formaldehyde |
| 228. | Nylon is a – |
A. vinyl polymer | |
B. polyamide | |
C. polyester | |
D. polysaccharide |
| 229. | natural rubber is a polymer of |
A. isoprene | |
B. styrene | |
C. butane | |
D. ethylene |
| 230. | Which of the following is used as a raw material for the manufacture of rayon? |
A. Coal | |
B. petroleum | |
C. cellulose | |
D. plastic |