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Alkanes

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12
Question 2
69%

Which equation(s) represent(s) a propagation step in the mechanism for the free-radical mono-bromination of propane, CH3CH2CH3\text{CH}_3\text{CH}_2\text{CH}_3CH3​CH2​CH3​, to specifically form 2-bromopropane, CH3CHBrCH3\text{CH}_3\text{CHBrCH}_3CH3​CHBrCH3​?

  1. CH3C˙HCH3+Br2→CH3CHBrCH3+Br∙\text{CH}_3\dot{\text{C}}\text{HCH}_3 + \text{Br}_2 \rightarrow \text{CH}_3\text{CHBrCH}_3 + \text{Br}\bulletCH3​C˙HCH3​+Br2​→CH3​CHBrCH3​+Br∙
  2. CH3CH2CH3+Br∙→CH3C˙HCH3+HBr\text{CH}_3\text{CH}_2\text{CH}_3 + \text{Br}\bullet \rightarrow \text{CH}_3\dot{\text{C}}\text{HCH}_3 + \text{HBr}CH3​CH2​CH3​+Br∙→CH3​C˙HCH3​+HBr
  3. CH3CH2CH3+Br∙→CH3CH2C˙H2+HBr\text{CH}_3\text{CH}_2\text{CH}_3 + \text{Br}\bullet \rightarrow \text{CH}_3\text{CH}_2\dot{\text{C}}\text{H}_2 + \text{HBr}CH3​CH2​CH3​+Br∙→CH3​CH2​C˙H2​+HBr
A

Only 1 and 3

B

Only 2 and 3

C

Only 1 and 2

D

1, 2 and 3

Markscheme

Alkanes Questions

  1. A Level
  2. /Chemistry
  3. /Alkanes

15 exam-style questions on OCR A A Level Chemistry Alkanes. Each one has a worked solution and a mark scheme showing where the marks go.

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