A-LevelChemistryIntroduction to organic chemistry9701/12 · Feb/Mar 2025 · Q381 Mark
The diagrams show the structures of two isomeric dicarboxylic acids, X and Y. X can be reduced to compound P with empirical formula C2H5O. Y can be reduced to compound Q, also with empirical formula C2H5O. Which statement is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AX is a cis isomer; compound P and compound Q are identical.
BX is a cis isomer; compound P and compound Q are isomers of each other.
CX is a trans isomer; compound P and compound Q are identical.
DX is a trans isomer; compound P and compound Q are isomers of each other.
✓ Correct answer
A: X is a cis isomer; compound P and compound Q are identical.
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