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Multiple Choice
Which of the following statements best describes the concept of chirality in organic molecules?
A
Chirality is the property of a molecule having two or more double bonds in a conjugated system.
B
Chirality occurs when a molecule has a plane of symmetry, making it superimposable on its mirror image.
C
Chirality is the ability of a molecule to rotate plane-polarized light in a clockwise direction.
D
Chirality refers to the presence of a carbon atom bonded to four different groups, resulting in non-superimposable mirror images.
Verified step by step guidance
1
Understand the concept of chirality: Chirality in organic chemistry refers to a molecule's property where it cannot be superimposed on its mirror image. This is similar to how left and right hands are mirror images but not superimposable.
Identify the structural feature responsible for chirality: A chiral molecule typically contains a carbon atom bonded to four different groups. This carbon is known as a chiral center or stereocenter.
Evaluate the given statements: Analyze each statement to determine if it accurately describes chirality. The first statement about double bonds in a conjugated system does not relate to chirality. The second statement about a plane of symmetry contradicts chirality, as chiral molecules lack such symmetry.
Consider the optical activity: While chirality is related to the ability of a molecule to rotate plane-polarized light, it is not limited to rotation in a clockwise direction. This property is known as optical activity and is a result of chirality.
Select the correct description: The correct statement is that chirality refers to the presence of a carbon atom bonded to four different groups, resulting in non-superimposable mirror images. This aligns with the definition of a chiral center.