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JEE Main Chemistry question

ChemistryOrganic Chemistry - Some Basic Principles and TechniquesJEE Main

How many of the following will exhibit geometrical isomerism: but-2-yne, but-2-ene, propene, 2-methylbut-2-ene, 1-phenylpropene, 1-phenylbut-1-ene, 1,1-diphenylpropene?

Answer: 3

Solution

But-2-yne (a linear triple bond) cannot show cis/trans isomerism. But-2-ene (each alkene carbon bears –CH₃ and –H, both different) can. Propene's terminal =CH₂ carries two identical H's — cannot. 2-Methylbut-2-ene has one

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Question ID VK-140478