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Edexcel IAL Chemistry 5.1 Alkenes and carbon–carbon double bonds

Count sigma bonds along each internuclear axis and pi bonds above and below the plane, then use ring and double-bond unsaturation to verify the molecular formula.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Count sigma and pi bonds from displayed or skeletal alkene structures.
  • Compare head-on sigma overlap with sideways pi overlap above and below the bond axis.
  • Apply alkene and cycloalkene general formulae to molecular and empirical formulae.

5.1—The general formula of alkenes and understand that alkenes and cycloalkenes are hydrocarbons which are unsaturated (have question 1

[Maximum number: 1]

Geometric isomerism is shown by 2-chlorobut-2-ene.

What is the total number of sigma bonds in Z-2-chlorobut-2-ene?

A

3

B

4

C

10

D

11

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