Practice IB Chemistry Topic R3.4 Electron-pair Sharing Reactions with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for R3.4 Electron-pair Sharing Reactions and mirrors Paper 1A, 1B, 2 style where relevant.
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Which part of the haloalkane is attacked by the nucleophile?
Substitution mechanisms depend on molecular structure and carbocation stability.
Compare the mechanisms of and reactions with reference to the number of steps involved.
For the reaction of with , identify the likely mechanism and explain your choice.
Outline the full mechanism for the reaction you chose, using curly arrows.
Leaving groups affect the reactivity of halogenoalkanes.
Define the term leaving group.
Identify the leaving group in the following reaction:
Name another halide that could act as a leaving group.
The first step in a reaction mechanism is shown.
Which statements are correct?
I. The leaving group is the bromide ion.
II. The carbocation has a trigonal planar geometry.
III. The bond undergoes homolytic fission.
The iron(III) ion forms the complex ion , shown.
Which statements are correct?
I. The charge on the complex ion is
II. The water molecules are acting as Lewis bases
III. The complex ion has coordination number 6