Drawing and naming the alcohols
3 marks · EasyDraw the displayed formula of methanol.
Give the molecular formula for methanol.
State the functional group present in methanol.
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(a) — · must show central carbon atom bonded to three hydrogens and one oxygen, oxygen bonded to a hydrogen (O–H shown separately, not as OH), all bonds shown
(b) CH4O
(c) hydroxyl group (–OH) · must show ‘hydroxyl group’ or ‘–OH’
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Marking points
B1 (a) · 1 mark · Displayed formula shows C bonded to 3 H and an O, and O bonded to H with all bonds shown.
B1 (b) · 1 mark · Correct molecular formula: CH4O.
B1 (c) · 1 mark · States hydroxyl group or –OH as the functional group.
Worked solution
b) Molecular formula is CH4O.
c) The functional group is the hydroxyl group, written as –OH.