Chemistry 0620 · IGCSE · Alcohols

Alcohols — practice question

Ethanol is made by two routes: method 1 fermentation of aqueous glucose method 2 catalytic addition of steam to an alkene.
(a)[2]

State two other conditions required for method 1.

(b(i))[2]

State the usual temperature and pressure used in method 2.

(b(ii))[1]

Name the alkene used in method 2.

(b(iii))[1]

State why the reaction in method 2 is called an addition reaction.

(c(i))[1]

State what the term acid means.

(c(ii))[1]

State what weak means in the term weak acid.

(c(iii))[2]

Determine the oxidation number of phosphorus in the $\text{PO}_4^{3-}$ ion. Show your working.

(d)[2]

Give one advantage for each method used to produce ethanol.

(e(i))[1]

Name the acidified oxidising agent.

(e(ii))[1]

State, in redox terms, what kind of reagent ethanol is in this reaction.

(f(i))[1]

Name the salt.

(f(ii))[1]

Write the formula of the salt.

(f(iii))[1]

Identify the other product.

Worked solution & mark scheme

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