Chirality in chemistry

Chirality in chemistry - Test

1. What does it mean for a molecule to be chiral?

A) It has no stereocenters.
B) It has no optical rotation.
C) It has a linear structure.
D) It cannot be superimposed on its mirror image.

2. What is a stereocenter?

A) An atom that is bonded to three different groups.
B) An atom that is bonded to four different groups.
C) An atom that is bonded to four identical groups.
D) An atom that is bonded to two groups.

3. How many stereoisomers can a chiral molecule with one stereocenter have?

A) 1
B) 3
C) 4
D) 2

4. Which type of light is used in optical rotation experiments?

A) Plane-polarized light.
B) Ultraviolet light.
C) Visible light.
D) Infrared light.

5. How can chirality be determined experimentally?

A) By counting the number of carbons in a molecule.
B) By analyzing the color of the substance.
C) By measuring optical activity with a polarimeter.
D) By checking the molecular weight of a compound.

6. What is a racemic mixture?

A) A mixture of meso compounds.
B) A 50:50 mixture of two enantiomers.
C) A mixture of diastereomers.
D) A mixture of structurally different molecules.

7. Why are enantiomers important in drug development?

A) They are easier to synthesize.
B) They have no medicinal value.
C) They have the same properties in the body.
D) They can have different biological effects.

8. What is an optically active compound?

A) A compound with no stereocenters.
B) A compound that rotates the plane of polarized light.
C) A compound that absorbs light.
D) A compound with high molecular weight.

9. How does chirality affect the physical properties of a molecule?

A) Diastereomers have identical boiling points.
B) Enantiomers have identical physical properties except for optical activity.
C) Racemic mixtures have higher melting points than pure enantiomers.
D) Chiral molecules are always more soluble than achiral molecules.

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