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11th Standard English Medium Chemistry Subject Fundamentals of Organic Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions

Published on: 13/05/2022

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Std: 11th Standard - Chemistry

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

Draw the cis, trans isomeric structures of 1, 3-butadiene.

Trans isomer is more stable than cis isomer. Justify this statement.

Define geometrical isomerism with an example.

Define stereo-isomerism.

Explain ring chain isomerism with the formula C₄H₈

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Answers Key:

Generic 2

5 x 2 = 10

Trans isomer is more stable than cis isomer. This is because in the cis isomer, the bulky groups are on the same side of the double bond. The steric repulsion of the groups makes the cis isomers less stable than the trans isomers in which bulky groups are on the opposite side.

Geometrical isomers are the stereoisomers which have different arrangement of groups or atoms around a rigid framework of double bonds. This type of isomerism occurs due to restricted rotation of double bonds or about single bonds in cyclic compounds.

The isomers which have same bond connectivity but different arrangement of groups or atoms in space are known as stereoisomers. This phenomenon is known as stereoisomerism.

In ring chain isomerism, compounds have the same molecular formula but differ in terms of bonding of carbon atoms to form open chain and cyclic structures.