Chemistry 0620 · IGCSE · Alcohols

Alcohols — practice question

(a(i))[1]

In Fig. 6.1, circle the alcohol functional group.

(a(ii))[1]

State the structural feature of crotyl alcohol that proves it is unsaturated.

(a(iii))[1]

Deduce the molecular formula for crotyl alcohol.

(a(iv))[2]

Suggest how fractional distillation may be used to separate a mixture containing crotyl alcohol and water.

(b)[2]

Describe two conditions needed for producing ethanol by the fermentation of aqueous glucose.

(c)[1]

Select from the list the general formula for the homologous series that ethene belongs to. C$_n$H$_n$ C$_n$H$_{2n}$ C$_n$H$_{2n+2}$ C$_{2n}$H$_n$

(d(i))[1]

Ethane is an alkane. State the kind of bonding found in alkanes.

(d(ii))[1]

Draw the displayed formula for a molecule of ethane.

(d(iii))[1]

Complete the sentence. Alkanes are unreactive except in combustion and substitution with …………………

(d(iv))[2]

Complete the symbol equation for the complete combustion of methane. CH$_4$ + ….O$_2$ → ……… + 2H$_2$O

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: draw a circle around the OH group

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