Q28 · Practice questionSimple familiar1 mark
QUESTION 28
A compound has a strong IR absorption near 1715 cm⁻¹ but no broad O–H absorption. Which class is consistent with this evidence?
(A)
Alcohol
(B)
Carboxylic acid
(C)
Ketone
(D)
Alkane
WORKED SOLUTION
1 markAnswer C
C
The carbonyl absorption with no O–H is consistent with a ketone. Additional evidence would be needed to distinguish it from every other carbonyl class.
- Select C. [1 marks]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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