Which of the following is the first man made plastic that is bad conductor of heat?
A. Teflon
B. Polythene
C. Bakelite
D. Nylon
Answer: Option C
A. Teflon
B. Polythene
C. Bakelite
D. Nylon
Answer: Option C
The fibers, such as nylon and polyester, that are made from chemical substances are called:
A. Natural fibres
B. Wool
C. Synthetic fibres
D. Silk
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