Chemistry 5070 · O Level · Alcohols

Alcohols — practice question

Ethanol, $\text{C}_2\text{H}_5\text{OH}$, belongs to the homologous series of alcohols.
(a)[1]

Give the general formula for the homologous series of alcohols.

(b)[2]

Members of a homologous series possess the same general formula and also show similar chemical properties. State two other general characteristics of a homologous series.

(c(i))[3]

Calculate the volume of hydrogen produced at room temperature and pressure when $1.35\text{ g}$ of sodium reacts with excess ethanol. Give your answer to two significant figures.

(c(ii))[1]

Water is introduced into the reaction mixture to form an aqueous solution. Then a few drops of litmus are added. The litmus turns blue. Suggest the name of the ion in the aqueous solution responsible for this colour change.

(d)[2]

State two ways in which ethanol is used.

(e)[3]

Describe how ethanol is made from ethene. Include the other reactant and the conditions used in the process.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: $C_nH_{2n+1}OH$

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