Drawing and naming the alcohols

2 marks · Hard

Draw the displayed formula for propan-2-ol. Clearly show all atoms and bonds, including the –OH group.

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

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Must show: All 3 carbons connected in a chain, –OH bonded to central (2nd) carbon, All hydrogen atoms shown, Bond between O and H is shown

Also accept: C3 backbone drawn horizontally or vertically; Hydrogen atoms placed above/below line; C–O–H bond clearly shown

Common mistakes: Missing bond between O and H; Placing –OH on first or third carbon; Incorrect total hydrogens

Show mark scheme and worked solution

Marking points

M1 · 1 mark · Structure with 3 carbons in a chain, –OH shown attached to central (2nd) carbon

A1 · 1 mark · All hydrogen atoms shown correctly and O–H bond displayed

Worked solution

Propan-2-ol is an alcohol with three carbons and the –OH group on the middle carbon.

Displayed formula:

H H H | | | H–C–C–C–H | | OH H

All atoms and bonds are shown, with the –OH group on the second (middle) carbon.