Edexcel A-Level Chemistry AS 4.11 Draw and Name the Structural Isomers of Alkanes and Cycloalkanes with Up to Six Carbon Atoms Questions

Use marked Edexcel IAL Chemistry questions to count, draw and name alkane and cycloalkane isomers, checking branching, rings and duplicate structures.

Exam points

Count structural isomers for a given molecular formula without duplicates.
Draw and name alkane and cycloalkane isomers using displayed or skeletal formulae.

[Maximum number: 3]

This question is about cycloalkanes.

(a)

The skeletal formula of cycloalkane D is shown.

Figure for Question (a) — Edexcel A-Level Chemistry AS

[ 1 ]

(i)

Give the name of D.

[ 1 ]

(b)

There are four structural isomers of $\mathrm{C}_{6} \mathrm{H}_{12}$ with a ring of four carbon atoms.

One of these isomers is shown, in the first box.
Complete the skeletal formulae of the other three isomers.

Table for Question (b) — Edexcel A-Level Chemistry AS

[ 2 ]

All 3 correct

- Any 2 correct

(2)

(1)

Examples of isomers:

Figure for Answer to Question (b) — Edexcel A-Level Chemistry AS

Allow isomers in any order

Allow $\mathrm{CH}_{3}$ and $\mathrm{C}_{2} \mathrm{H}_{5}$ for side chains

Ignore bond angles and bond lengths

Do not award any structure with 2 or more rings

(2)

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Edexcel A-Level Chemistry AS 4.11 Draw and Name the Structural Isomers of Alkanes and Cycloalkanes with Up to Six Carbon Atoms Questions question 1

Question (a)

Question (i)

Question (b)