Chemistry · Oct / Nov 2024 · Paper 42 · Question 5
0620
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The question as text
Alkenes are manufactured by cracking larger alkane molecules.
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5(a)[1]
petroleum
5(b)[2]
M1 high temperature
M2 catalyst
5(c)(i)[2]
C12H26 → 3C4H8 + H2
M1 C4H8
M2 correct equation
5(c)(ii)[1]
thermal decomposition
5(d)(i)[1]
poly(propene)
5(d)(ii)[3]
M1 chain of six C atoms joined by single bonds in a chain
M2 three correctly placed CH3 groups
M3 correct structure AND continuation bonds
5(d)(iii)[1]
addition
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