JEE Main 2015 · 4 Apr · Shift 1 · Chemistry Q52

ChemistrySingle correct+4 / -1Question 52 of 90

Which of the following compounds will exhibit geometrical isomerism ?

1 - Phenyl - 2 - butene

3 - Phenyl - 1 - butene

2 - Phenyl - 1 - butene

1, 1 - Diphenyl - 1 - propane

Answer and worked solution

Official answer: A

1-Phenyl-2-butene, $\ce{C6H5CH2CH=CHCH3}$ , has two different groups on each alkene carbon, so it shows cis-trans isomerism.

The other three each have a terminal $\ce{=CH2}$ or two identical groups on one carbon.

JEE Main 2015 · 4 Apr · Shift 1, Chemistry question 52