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

2. What is a stereocenter?

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

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

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

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

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

5. How can chirality be determined experimentally?

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

6. What is a racemic mixture?

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

7. Why are enantiomers important in drug development?

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

8. What is an optically active compound?

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

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

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

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