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Alkanes

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Question 5

Which equation represents a propagation step in the free-radical substitution reaction of butane with chlorine to form 2-chlorobutane?

A

CH3CH2CH2CH3+Cl∙→CH3CH2CH(Cl)CH3+H∙\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_3 + \text{Cl}^\bullet \to \text{CH}_3\text{CH}_2\text{CH(Cl)CH}_3 + \text{H}^\bulletCH3​CH2​CH2​CH3​+Cl∙→CH3​CH2​CH(Cl)CH3​+H∙

B

CH3CH2CH∙CH3+Cl2→CH3CH2CH(Cl)CH3+Cl∙\text{CH}_3\text{CH}_2\text{CH}^\bullet\text{CH}_3 + \text{Cl}_2 \to \text{CH}_3\text{CH}_2\text{CH(Cl)CH}_3 + \text{Cl}^\bulletCH3​CH2​CH∙CH3​+Cl2​→CH3​CH2​CH(Cl)CH3​+Cl∙

C

CH3CH2CH∙CH3+Cl∙→CH3CH2CH(Cl)CH3\text{CH}_3\text{CH}_2\text{CH}^\bullet\text{CH}_3 + \text{Cl}^\bullet \to \text{CH}_3\text{CH}_2\text{CH(Cl)CH}_3CH3​CH2​CH∙CH3​+Cl∙→CH3​CH2​CH(Cl)CH3​

D

CH3CH2CH2CH3+Cl2→CH3CH2CH(Cl)CH3+HCl\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_3 + \text{Cl}_2 \to \text{CH}_3\text{CH}_2\text{CH(Cl)CH}_3 + \text{HCl}CH3​CH2​CH2​CH3​+Cl2​→CH3​CH2​CH(Cl)CH3​+HCl

Markscheme

Alkanes Questions

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

9 exam-style questions on AQA A Level Chemistry Alkanes, covering Fractional distillation of crude oil, Modification of alkanes by cracking, Combustion of alkanes, and Chlorination of alkanes. Each one has a worked solution and a mark scheme showing where the marks go.

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