CH4.1 - Stereoisomerism

What is the key feature of a chiral centre in a molecule?

• It has a double bond.

• It is bonded to four different groups.

• It is part of a ring structure.

• It has a triple bond.

Which type of isomerism involves the orientation of atoms around a chiral centre?

• Structural isomerism

• Geometric isomerism

• Optical isomerism

• Conformational isomerism

In E-Z isomerism, what does the 'E' stand for?

• Entgegen (opposite)

• Enantiomer

• Equivalent

• Equal

Which of the following is true about enantiomers?

• They have identical physical properties.

• They rotate plane-polarised light in opposite directions.

• They have different molecular formulas.

• They cannot be separated.

What is the significance of optical isomerism in biochemical compounds?

• It affects the colour of the compound.

• It influences the boiling point.

• It is crucial for the compound's biological activity.

• It determines the compound's solubility in water.

Which of the following is a method to distinguish between enantiomers?

• Mass spectrometry

• Infrared spectroscopy

• Polarimetry

• Ultraviolet spectroscopy

What is the relationship between E-Z isomers?

• They are mirror images.

• They are non-superimposable.

• They differ in the spatial arrangement of groups around a double bond.

• They have different molecular weights.

Which of the following is an example of a chiral molecule?

• Methane

• Ethane

• 2-butanol

• Propane

How do different enantiomers affect plane-polarised light?

• They rotate the light by different angles in the same direction

• They rotate the light by the same angle but in opposite directions

• The do not rotate the light

• They rotate the light by different angles in opposite directions

Which of the following statements is true about E-Z isomerism?

• It occurs in molecules with a chiral centre.

• It is a type of structural isomerism.

• It involves the rotation around a single bond.

• It occurs in compounds with restricted rotation around a double bond.