Lesson_1_quiz

Which of the following best defines stereochemistry?

• The study of the three-dimensional arrangement of atoms in molecules
• The study of the composition of molecules
• The study of chemical reactions
• The study of the physical properties of molecules

Isomers are molecules that have:

• The same molecular formula but different structures
• Different molecular formulas but the same structure
• The same physical properties
• Different chemical properties

Structural isomers (constitutional isomers) differ in:

• The connectivity of atoms
• The arrangement of atoms in space
• The number of atoms
• Their molecular weight

Which of the following is an example of structural isomers?

• n-butane and isobutane
• cis-2-butene and trans-2-butene
• D-glucose and L-glucose
• Enantiomers

Configurational isomers are stereoisomers that can be interconverted only by:

• Breaking and reforming chemical bonds
• Rotation around a single bond
• Changing the temperature
• Changing the pressure

Which of the following is NOT a type of configurational isomer?

• Conformational isomers
• Enantiomers
• Diastereomers
• Geometric isomers

Wedge and dash notation is used to represent:

• The three-dimensional structure of molecules
• The connectivity of atoms
• The number of atoms in a molecule
• The molecular weight of a molecule

In wedge and dash notation, a solid wedge represents a bond:

• Coming out of the plane of the paper
• In the plane of the paper
• Going into the plane of the paper
• Broken

In wedge and dash notation, a dashed line represents a bond:

• Going into the plane of the paper
• In the plane of the paper
• Coming out of the plane of the paper
• Broken

Geometric isomers (cis-trans isomers) occur due to:

• Restricted rotation around a double bond or ring
• The presence of a chiral center
• The presence of a plane of symmetry
• The absence of a plane of symmetry