Oxidation of alcohols

Chemia IBPaper 1B, maj 2026, TZ1wzorowane2 pktotwarteśrednie (szac.)

Zadanie 2a

(a) Outline two features of this experiment that ensure that the propanal intermediate is not a major product.

• Materiał graficzny

Chemia IBPaper 2, maj 2026, TZ1wzorowane1 pktotwartełatwe (szac.)

Zadanie 3d

Pentan-2-ol will react with acidified potassium dichromate, K₂Cr₂O₇, which is an oxidizing agent. State the name of the product of this reaction.

Chemia IBPaper 1A, maj 2026, TZ3wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 27

When heated under reflux with excess acidified potassium dichromate(VI), how many of the structural isomers of the alcohol C₅H₁₁OH are oxidized to a carboxylic acid? A. 3 B. 7 C. 4 D. 8

Chemia IBPaper 2, maj 2025, TZ1wzorowane5 pktotwarteśrednie (szac.)

Zadanie 6b

The compound X shown below occurs naturally in cocoa and coffee and is used as a flavouring agent. (i) State the name of the functional group found in compound X. (ii) Deduce the IUPAC name of X. (iii) Draw a structural isomer of X taken from a different…

• Materiał graficzny

Chemia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 28

Which alcohol and which conditions would give the highest yield of 3-methylbutanoic acid on oxidation with acidified potassium dichromate(VI)? A. 3-methylbutan-2-ol, reflux B. 3-methylbutan-1-ol, distillation C. 3-methylbutan-1-ol, reflux D.…

Chemia IBPaper 1A, maj 2025, TZ2wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 29

Which change represents oxidation of the functional group? A. CH₃COCH₃ → CH₃CH(OH)CH₃ B. CH₃CH(OH)CH₃ → CH₃COCH₃ C. CH₃CH₂COOH → CH₃CH₂CHO D. CH₃CH=CH₂ → CH₃CH₂CH₃

Chemia IBPaper 2, listopad 2025, TZ3wzorowane5 pktotwarteśrednie (szac.)

Zadanie 3e

A compound used to make polymers, hexanedioic acid, can be produced by a series of reactions starting from cyclohexane. (i) Deduce how reactant A is related to hex-1-ene. (ii) For the C=O functional group present in intermediate C, state its structural…

• Tabela do uzupełnienia
• Materiał graficzny

Chemia IBPaper 1A, listopad 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 26

Which compounds are oxidized when heated with acidified potassium dichromate(VI) solution? I. CH₃CH₂C(CH₃)₂OH II. (CH₃)₂CHCH₂OH III. CH₃CH(OH)CH₃ A. I and II only B. I and III only C. II and III only D. I, II and III

Chemia IBPaper 2, maj 2024, TZ2wzorowane1 pktotwarteśrednie (szac.)

Zadanie 1e

When A is refluxed with excess acidified potassium dichromate(VI), K₂Cr₂O₇, the product is compound E, whose molar mass is greater than that of A. From this information alone, identify one functional group in E.

Chemia IBPaper 1, maj 2024, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 26

What is the organic product when butan-2-ol, CH₃CH(OH)CH₂CH₃, is heated under reflux with an excess of an acidified oxidizing agent? A. CH₃CH₂CH₂COOH B. CH₃COCH₂CH₃ C. CH₃CH₂CH₂CHO D. CH₃CH(OH)CH₂CH₃

Chemia IBPaper 1, listopad 2024wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 25

Which compound can be oxidized to a carboxylic acid by heating under reflux with an excess of an acidified oxidizing agent? A. CH₃CH(OH)CH₂CH₃ B. (CH₃)₃COH C. (CH₃)₂CHCH₂OH D. CH₃COCH₂CH₃

Chemia IBPaper 1, maj 2023, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 25

Which products could be obtained by heating isomers of C₄H₁₀O under reflux with excess acidified potassium dichromate(VI)? I. 2-methylpropanal II. butanone III. butanoic acid A. I only B. II and III only C. I and III only D. I, II and III

Chemia IBPaper 2, listopad 2023, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 3f

State the name of a compound that forms the carboxylic acid isomer from 3e when it is heated under reflux with an excess of an oxidizing agent.

Chemia IBPaper 2, listopad 2023, TZ2wzorowane1 pktotwarteśrednie (szac.)

Zadanie 3f

State the name of a compound that would form the carboxylic acid you drew in part 3e when it is heated under reflux with an excess of an oxidizing agent.

Chemia IBPaper 1, listopad 2023, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 27

2-Methylpropan-1-ol is heated with an acidified oxidizing agent and the first product is distilled off as it forms. What is this product? A. (CH₃)₂CHCOOH B. (CH₃)₂CHCHO C. (CH₃)₂CHCH₂OH D. CH₃COCH₂CH₃

Chemia IBPaper 1, listopad 2023, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 27

Butan-1-ol is heated with an acidified oxidizing agent, and the first product formed is distilled off as soon as it forms. Which compound is collected? A. CH₃CH₂COCH₃ B. CH₃CH₂CH₂CH₂OH C. CH₃CH₂CH₂CHO D. CH₃CH₂CH₂COOH

Chemia IBPaper 2, maj 2022, TZ1wzorowane1 pktotwartełatwe (szac.)

Zadanie 3e

Compound B is shown below. Deduce what would be observed when each of Compound B and pentan-2-ol is warmed separately with acidified aqueous potassium dichromate(VI).

• Materiał graficzny

Chemia IBPaper 1, maj 2022, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 26

Which procedure is best for converting butan-1-ol into butanoic acid? A. Heat under reflux with an acidified oxidizing agent B. Heat under reflux with a reducing agent C. Heat with an acidified oxidizing agent and distil off the product as it forms D. Heat…

Chemia IBPaper 1, listopad 2022wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 26

Which conditions best favour the oxidation of butan-1-ol to butanal rather than to butanoic acid? A. Excess oxidizing agent, heated under reflux B. Excess oxidizing agent, heated with the product distilled off as it forms C. Limited oxidizing agent, heated…