Which of the following is used in plastics?
A. Butane
B. Ethylene
C. Krypton
D. Ammonia
Answer: Option B
A. Butane
B. Ethylene
C. Krypton
D. Ammonia
Answer: Option B
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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