The development of which polymer enabled the British to have effective radar equipment and thus contributed to the British success in the Battle of Britain in World War II?
A) polystyrene
B) polyvinyl chloride
C) Teflon
D) polyethylene
Correct Answer:
Verified
Q34: One of the problems in the production
Q35: Which of the following statements about the
Q36: Polystyrene is not used for
A)condiment bottles.
B)disposable coffee
Q37: Which of the following types of carbon
Q38: The monomer of polypropylene is
A)CH₂ 
Q40: HDPE stands for
A)high-density polyethylene.
B)hot-dipped polyethylene.
C)high-dose polyethylene.
D)highly-diffuse polyethylene.
Q41: Natural rubber can be made from the
Q42: This formula in which n can be
Q43: Vulcanization makes rubber
A)hard.
B)sticky.
C)soft.
D)less elastic.
Q44: This formula in which n can be
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