Skip to content

Course home

Sign up

Alkanes

EasyMedium
12345678910111213
Question 1
100%

The chlorination of 2,2-dimethylpropane, C5H12\text{C}_5\text{H}_{12}C5​H12​, occurs via a free-radical substitution mechanism.

Which of the following equations could represent a propagation step in this reaction?

  1. C5H11∙+Cl2→C5H11Cl+Cl∙\text{C}_5\text{H}_{11}\bullet + \text{Cl}_2 \rightarrow \text{C}_5\text{H}_{11}\text{Cl} + \text{Cl}\bulletC5​H11​∙+Cl2​→C5​H11​Cl+Cl∙
  2. C5H12+Cl∙→C5H11∙+HCl\text{C}_5\text{H}_{12} + \text{Cl}\bullet \rightarrow \text{C}_5\text{H}_{11}\bullet + \text{HCl}C5​H12​+Cl∙→C5​H11​∙+HCl
  3. C5H11∙+Cl∙→C5H11Cl\text{C}_5\text{H}_{11}\bullet + \text{Cl}\bullet \rightarrow \text{C}_5\text{H}_{11}\text{Cl}C5​H11​∙+Cl∙→C5​H11​Cl
A

Only 1 and 2

B

Only 1 and 3

C

Only 2 and 3

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.

Question bank