DP Chemistry (first assessment 2025)

Question 22M.1A.SL.TZ2.27

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.SL.TZ2.27
Level	SL	Paper	1A	Time zone	TZ2
Command term	Apply	Question number	27	Adapted from	N/A

27.

[Maximum mark: 1]

22M.1A.SL.TZ2.27

Which reaction mechanisms are typical for alcohols and halogenoalkanes?

[1]

Markscheme

Examiners report

Only 25% of the candidates deduced the reaction mechanisms that are typical for alcohols and halogenoalkanes. Candidates were expected to deduce that the reactions would be substitutions since both compounds are saturated.

Syllabus sections

Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.4—Electron-pair sharing reactions » Reactivity 3.4.2—In a nucleophilic substitution reaction, a nucleophile donates an electron pair to form a new bond, as another bond breaks producing a leaving group. Deduce equations with descriptions and explanations of the movement of electron pairs in nucleophilic substitution reactions.

Question 22M.1A.SL.TZ2.27

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