Isomerism in Organic Compounds

Isomerism that arises out of the difference in spatial arrangement of atoms or groups about the doubly bonded carbon atoms is called?

• Structural Isomerism

• Stereoisomerism

• Geometrical Isomerism

• Optical Isomerism

Which among the following does not exhibit geometric isomerism?

• hex-1-ene

• hex-2-ene

• hex-3-ene

• hex-4-ene

Which statement best defines stereoisomerism?

• Same molecular formula but different structural formula

• Same molecular and structural formula but a different spatial arrangement of atoms

• Same molecular formula with the same chemical properties

• Similar chemical properties with different physical properties such as solubility

How to determine that a molecule exhibits E/Z isomerism?

• Restricted rotation in a carbon-carbon single bond of alkenes

• Both carbon atoms of a double bond have 2 different atoms or groups attached to them

• Exist in cyclic compounds only

• Similar chemical properties and a different molecular formula

Two optical isomers have the same

• Empirical formula

• Structural formula

• Molecular formula

Which of the following molecules exhibit geometrical isomerism?

• CH₂=CHCH₃

• C₆H₅CH=CHC₆H₅

• (CH₃)₂C=CHCH₃

• CH₃CH₂N=OH

Another name for enantiomers

• chain isomers

• E/Z isomers

• optical isomers

• positional isomers

Define chiral centre

• also known as chiral carbon

• a type of enantiomer

• a carbon with four different groups or atoms attached to it

• optically active compounds

Can enantiomers rotate plane-polarised light?

• Yes in all directions

• No because it is optically active

• Yes, rotates plane polarised light in opposite directions

• No due to its restricted rotation of carbon-carbon double bond

Do enantiomers have the same physical and chemical properties?

• Yes

• No