3. Why are plastics used for storing various kinds of materials including chemicals?
4. Which plastic is used for non-stick coating on cook wares and why?
5. Why should the polythenes and chips wrappers be thrown in the dustbin?
please ans these its urgent
Answers
Answer:
3. This is why there are a variety of plastic materials used for storing acids and bases – so that each container can accommodate the unique properties of individual chemicals. For example, the plastic polypropylene can be used to store corrosive chemicals.
4. PTFE (Polytetrafluoroethylene) is used as a non-stick coating for pans and other cookware. Telefon allow to dry the food without sticking the food to pan as it is non stick cookware. Teflon is used to make non stick pan as PTFE(polytetrafluoroethylene) coating is present which is a non stick chemical coating help in not sticking fat, oil like subtance in it.
5. We should not throw the polythene and chip wrappers in the dustbin because it can cause pollution which is very harmful for our mother earth. The polythene and plastic bags should be thrown into the dustbin to recycle as recycling could save the environment.
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Answer:
6.The egg placed in water swells due to ( )
A. endosmosis. B. exosmosis. C .endocytosis D .A and B