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Which of the following statements best explains... - WAEC Chemistry 1989 Question

Which of the following statements best explains cracking ? It is a process
A
in which an alkene adds on itself repeatedly to form long chain polymers
B
in which large hydrocarbon molecules are broken into smaller units
C
for measuring theoctane number of petrol
D
in which carbon chain results in a zigzag arrangement
correct option: b
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