Question

the alkene that exhibits geometrical isomerism is:
a. Propene
b. 2-methylpropene
c. But-2-ene
d. 2-methylbut-2-ene​

Answer 1

Answer:

option c

Explanation:

So, the alkene But-2-ene shows geometrical isomerism. In option D, 2-methylbut-2-ene, there are two methyl groups attached to one of the double bonded carbon atoms, if rotated cannot show geometrical isomerism. So, the correct answer is Option C.

Answer 2

Answer:

option C

Explanation:

2-butene exist as cis or trans.

Due to restricted rotation around double bond, it exhibits geometric isomerism.

In other options one carbon of (C=C) have same groups, so does not show geometrical.

H H

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C = C. cis-2- butene

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CH3 CH3

H CH3

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C = C trans-2-butene

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CH3 H