Chirality in chemistry

Chirality in chemistry - Test

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

A) It has a linear structure.
B) It has no optical rotation.
C) It has no stereocenters.
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 identical groups.
C) An atom that is bonded to four different 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) 4
C) 2
D) 3

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

A) Visible light.
B) Plane-polarized light.
C) Ultraviolet light.
D) Infrared 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 mixture of diastereomers.
D) A 50:50 mixture of two enantiomers.

7. Why are enantiomers important in drug development?

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

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

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