What is PETP Where it is used
3. What quality of teflon makes it as raw material for making non-stick cookwares?
la) Maniles of cooking utensils are made of plastic
Bakelite is used to make electrical switches
5. What is photo degradation ? What are its effects ?
1. Name three sunthetic fibres and mention two uses of each.
2. What are biodegradable and non-biodegradable substances ?
Mention two advantages and two disadvantages of synthetic fibres.
1. Mention a few problems associated with the excessive use of synthetic plastics.
What are sunthetie fibres
4. reason for the following:
LONG ANSWER TYPE QUESTIONS
3.
cein-Depth - 8
60
Answers
Explanation:
Polytetrafluoroethylene prefers to socialize only with itself. The unique properties of PTFE keep food from sticking to nonstick cookware because it has an amazingly low coefficient of friction. That low friction means things like butter or oil aren't needed to keep food from sticking to the bottom of the pan.
Handle in cooking utensils are made of plastic because on heating uteutensiit became hot as metal are good good conductor of heat where as plastic is a bad conductor of heat thus on heating utensils became hot but handle don not so as to easily to hold utensils.
Rayon. a. Inthe medical field for making bandages and surgical dressings. b. In making bed sheets, curtains, blankets etc.
Nylon. a. Used in making socks, tents, toothbrushes, car seat belts, curtains, etc. b. ...
Polyester. a. In making the fabrics for the sarees, dress materials and curtains. b. ...
Acrylic.