Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

Methanol is produced industrially by reacting carbon monoxide with hydrogen. The gases are used at a temperature of 250 ^{\circ}C and a pressure of 75 atmospheres. $\text{CO(g)} + 2\text{H}_2\text{(g)} \rightleftharpoons \text{CH}_3\text{OH(g)}$ The forward reaction releases heat.
(a)[1]

Suggest one source from which hydrogen could be obtained for this industrial process.

(b)[4]

Fill in the table using only increases, decreases or no change.

(c(i))[2]

State two broad characteristics of a homologous series.

(c(ii))[4]

Draw the structures of two different alcohols, each with three carbon atoms. Show every atom and every bond. Name the two alcohols.

(c(iii))[1]

What term is used for compounds that have the same molecular formula but different structural formulae?

(d(i))[1]

Name the ester X.

(d(ii))[2]

Give the names of the carboxylic acid and the alcohol that combine to produce ester X.

(d(iii))[2]

Draw the structure of ester Y. Show every atom and every bond.

Worked solution & mark scheme

This 17-mark question has a full step-by-step worked solution and mark scheme. One marking point: natural gas or hydrocarbons or water

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