oxidation

Question 1

Reagents and conditions for mild oxidation of alkenes and product formed

Answer 1

Reagents and conditions: KMnO4, dilute NaOh, cold

Product: Diol

Question 2

Reagents and conditions for oxidative cleavage of alkenes and product formed

Answer 2

Reagents and conditions: KMnO4, dilute H2SO4, heat 
Product: 
1. No side chains -> CO2 + H2O 
2. 1 side chain -> -COOH 
3. 2 side chains -> Ketones

Question 3

Reagents and conditions for oxidation of methanoic / ethanodenoic acid and products formed

Answer 3

Reagents and conditions: KMnO4, dilute H2SO4, heat

Products: CO2 + H2O

Question 4

Reagents and conditions for side-chain oxidation of methylbenzene and product formed

Answer 4

Reagents and conditions: KMnO4, dilute H2SO4, heat

Products: Benzoic acid

Question 5

Reagents and conditions for oxidation of primary alcohols and products formed

Answer 5

Reagent and condition 1: KMnO4, dilute H2SO4, heat under reflux
Product 1: Carboxylic acid

Reagent and condition 2: K2Cr2O7, dilute H2SO4, heat with immediate distillation
Product 2: Aldehyde

Question 6

Reagents and conditions for oxidation of secondary alcohol and products formed

Answer 6

Reagent and condition: K2Cr2O7 / KMnO4, dilute H2SO4, heat under reflux

Product: Ketone

Question 7

Reagents and conditions for oxidation of aldehydes and products formed

Answer 7

Reagent and condition: K2Cr2O7 / KMnO4, dilute H2SO4, heat under reflux

Product: Carboxylic acids

Question 8

General observations when using KMnO4 as an oxidising agent

Answer 8

Purple KMnO4 solution decolourises

Question 9

General observations when using K2Cr2O7 as an oxidising agent

Answer 9

Orange K2Cr2O7 solution turns green