CAIE A-Level Chemistry AS 16.1.2 Describe Questions

Practise CAIE 9701 alcohol reactions by selecting reagents and conditions, predicting products and writing balanced equations.

Exam points

oxidise primary alcohols to aldehydes by distillation or carboxylic acids under reflux, and secondary alcohols to ketones
dehydrate alcohol vapour over hot aluminium oxide or heat with concentrated sulfuric/phosphoric acid to form alkenes
write substitution, esterification, sodium-metal and complete-combustion equations with correct conditions

[Maximum number: 1]

Fig. 4.1 shows how propane, $\mathrm{C}_{3} \mathrm{H}_{8}$ , can be converted to propanoic acid, $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}$ .

Fig. 4.1

Reaction 3 takes place when $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$ is heated under reflux with acidified potassium dichromate(VI) solution.

Construct an equation to represent reaction 3. Use [O] to represent an atom of oxygen from the oxidising agent.

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}+2[\mathrm{O}] \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{H}_{2} \mathrm{O}$

All question bank results loaded

CAIE A-Level Chemistry AS 16.1.2 Describe Questions question 1