Isomerism

Question 1

Constitutional isomerism

Answer 1

Molecules are constitutional isomers of each other when they have the same molecular formula but different structural formula

Question 2

Comparison of chain/positional isomers

Answer 2

They have the same chemical properties but different physical properties such as boiling points

Question 3

Comparison of functional group isomers

Answer 3

Different physical and chemical properties.

Functional group determines the reactions the compound undergo

Question 4

Definition of cis-trans isomerism

Answer 4

A compound is said to exhibit cis-trans isomerism if it exhibits the following:
• a restricted rotation about a carbon-carbon bond, e.g. C=C bond
• has two different groups / atoms attached to each C atom of the C=C double bond

Question 5

Comparison of Cis-trans isomers

Answer 5

They have the same molecular formula and structural formula, but differ in the spatial arrangement of atoms.

Question 6

Chemical and Physical Properties of Cis-Trans Isomers

Answer 6

Cis and trans isomers have the same chemical properties but different physical properties due to polarity difference.