Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

A, B, C, D, E and F are structural isomers, each with molecular formula $\text{C}_4\text{H}_8\text{O$.
(a(i))[3]

Draw the skeletal formulae for A, B and C.

(a(ii))[1]

Name the type of structural isomerism shown by A and B.

(a(iii))[1]

State the observation when a sample of A is warmed with Tollens’ reagent.

(b(i))[5]

Give the structures of D, E and F, showing the two stereoisomers of E and labelling the stereoisomerism present.

(b(ii))[1]

Identify the gas formed when each of these isomers reacts with sodium metal.

(c(i))[1]

Give the equation for the reaction between $\text{C}_3\text{H}_6\text{O}$ and acidified potassium dichromate(VI), using $[\text{O}]$ where suitable.

(c(ii))[1]

Give the equation for the reaction between $\text{C}_3\text{H}_6\text{O}$ and sodium tetrahydroborate, $\text{NaBH}_4$, using $[\text{H}]$ where needed.

(c)

Another compound, G, $\text{C}_3\text{H}_6\text{O}$, has the same functional group as A. Give equations for the reactions of G with both acidified potassium dichromate(VI) and sodium tetrahydroborate, $\text{NaBH}_4$, using [O] or [H] as appropriate.

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: Accurate displayed structures for A/B and C

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI