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Alkanes

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Question 5

Chloromethane (CH3Cl\text{CH}_3\text{Cl}CH3​Cl) can undergo further reaction with chlorine in the presence of ultraviolet radiation to form dichloromethane (CH2Cl2\text{CH}_2\text{Cl}_2CH2​Cl2​).

Which equation represents a propagation step in the mechanism for this reaction?

A

CH3Cl+Cl∙→CH2Cl2+H∙\text{CH}_3\text{Cl} + \text{Cl}^\bullet \rightarrow \text{CH}_2\text{Cl}_2 + \text{H}^\bulletCH3​Cl+Cl∙→CH2​Cl2​+H∙

B

CH2Cl∙+Cl∙→CH2Cl2\text{CH}_2\text{Cl}^\bullet + \text{Cl}^\bullet \rightarrow \text{CH}_2\text{Cl}_2CH2​Cl∙+Cl∙→CH2​Cl2​

C

CH2Cl∙+Cl2→CH2Cl2+Cl∙\text{CH}_2\text{Cl}^\bullet + \text{Cl}_2 \rightarrow \text{CH}_2\text{Cl}_2 + \text{Cl}^\bulletCH2​Cl∙+Cl2​→CH2​Cl2​+Cl∙

D

CH3Cl+Cl2→CH2Cl2+HCl\text{CH}_3\text{Cl} + \text{Cl}_2 \rightarrow \text{CH}_2\text{Cl}_2 + \text{HCl}CH3​Cl+Cl2​→CH2​Cl2​+HCl

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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