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IB Chemistry SL 3.3 Electron Sharing Reactions Question Bank

Practise IB Chemistry SL 3.3 with questions on radical notation, homolytic fission and initiation, propagation and termination in substitution.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

3.3 Electron sharing reactions (Radicals) question 1

[Maximum number: 1]

Antioxidants are a type of food additive.

Antioxidants such as BHT and 3-BHA prevent the unwanted reactions of free radicals. State what a free radical is.

3.3 Electron sharing reactions (Radicals) question 2

[Maximum number: 2]

Alkenes, such as A (shown below), are important intermediates in the petrochemical industry because they undergo addition reactions to produce a wide variety of products, such as the conversion shown below.

Figure for Question 3.3 Electron sharing reactions (Radicals) question 2 — IB Chemistry SL

Question (a)

(a)

Another way to make B is the reaction shown below.

Figure for Question (a) — IB Chemistry SL
[ 2 ]

Question (i)

(i)

State the conditions required for this reaction to occur.

[ 1 ]

Question (ii)

(ii)

Outline why it would give a poor yield of the desired product.

[ 1 ]

3.3 Electron sharing reactions (Radicals) question 3

[Maximum number: 1]

Chlorine undergoes many reactions.

State the type of reaction occurring when ethane reacts with chlorine to produce chloroethane.

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