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Aldehydes and ketones (A-level only)

Aldehydes and ketones (A-level only)

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Question 11

Butanone (CH3COCH2CH3\text{CH}_3\text{COCH}_2\text{CH}_3CH3​COCH2​CH3​) reacts with sodium cyanide (NaCN\text{NaCN}NaCN) in the presence of dilute sulfuric acid to form a hydroxynitrile.

a.

State one hazard associated with the use of sodium cyanide (NaCN\text{NaCN}NaCN).

[1]
b.

Suggest a chemical reason, other than safety, why sodium cyanide is used in this preparation instead of hydrogen cyanide (HCN\text{HCN}HCN) alone.

[2]
c.

Outline the nucleophilic addition mechanism for the reaction of butanone with NaCN\text{NaCN}NaCN followed by dilute acid.

[4]
Markscheme

Aldehydes and ketones (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Aldehydes and ketones (A-level only)

14 exam-style questions on AQA A Level Chemistry Aldehydes and ketones (A-level only), covering Aldehydes and ketones (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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