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CAIE A-Level Chemistry AS 13.3.4 Terms Planar When Describing the Arrangement Questions

Practise deciding which atoms lie in one plane by applying sp2 trigonal-planar geometry and restricted pi bonding.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • use trigonal-planar sp2 centres to place each atom directly bonded around C=C in the same plane
  • extend planarity only through connected geometry that constrains the atoms, rather than assuming the whole molecule
  • distinguish local planarity at an alkene or carbonyl from tetrahedral sp3 centres that can break overall planarity

CAIE A-Level Chemistry AS 13.3.4 Terms Planar When Describing the Arrangement Questions question 1

[Maximum number: 1]

Quinone is an unsaturated molecule.

quinone

quinone

Which statement about quinone is correct?

A

Quinone is non-planar and has an overall dipole moment.

B

Quinone is non-planar and does not have an overall dipole moment.

C

Quinone is planar and has an overall dipole moment.

D

Quinone is planar and does not have an overall dipole moment.

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