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9701 MCQ Solution 37
Question 37:
[Organic > Introductory Organic]:
Which compounds show cis-trans isomerism?
1 but-2-ene
2 but-1-ene
3
2-methylpropene
Reference: Past Exam Paper – November 2002 Paper 1 Q37
Solution 37:
Answer: D.
In but-2-ene the unsaturated carbons have 2 pairs of the same group thus
can exhibit cis-trans isomerism.
In but-1-ene one of the unsaturated carbons
have a repeated group thus it cannot exhibit cis-trans isomerism.
Since 2 is incorrect
3 must also be incorrect and the only valid option is D.
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