(a) Low-density polyethylene
(b) Polycarbonate
(c) Polyethylene terephthalate
(d) Polyvinyl chloride
Ans: b
Explanation:
PC (polycarbonate) has good transparency and average thermal stability, It also belongs to engineering plastics, such as organic glass, such as polymethyl methacrylate, polycarbonate, etc.
PC is a widely used material, such as phone cases, laptops, etc. It is particularly used in the manufacturing of baby bottles, space cups, etc. In recent years, milk bottles have been controversial due to their presence of bisphenol A. The residual bisphenol A in PC releases more and faster at higher temperatures. Therefore, PC water bottles should not be used to hold hot water.
Bisphenol A (BPA) is a banned in many countries in food contact materials, due to its potentially harmful health impact. The ban means that BPA will not be allowed in products that come into contact with food or drink, such as the coating on metal cans, reusable plastic drink bottles, water distribution coolers and other kitchenware.
| BPA is a high production volume (HPV) chemical widely used in manufacturing polycarbonate plastics and epoxy resins used in nearly every industry. Humans appear to be exposed primarily through food packaging manufactured using BPA |
Bureau of Indian Standards (BIS) banned the use of chemical Bisphenol A (BPA) in the manufacture of infant feeding bottles.
Hence, option b is correct.
Read: Solved PYQs Science & Technology With Explanation 2021 UPSC Prelims