Q113 · Practice questionComplex familiar1 mark
QUESTION 113
How many distinct non-cyclic alkane structural isomers have molecular formula ?
(A)
3
(B)
4
(C)
6
(D)
5
WORKED SOLUTION
1 markAnswer D
Answer
D
Working
The five are hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane and 2,3-dimethylbutane. Rotated drawings do not create additional isomers.
Marking criteria
- Select D. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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