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Multiple Choice
In the context of chirality, which of the following statements is true about a molecule with a chiral center?
A
It must have a plane of symmetry.
B
It can exist as two enantiomers.
C
It is always optically inactive.
D
It cannot have any stereoisomers.
Verified step by step guidance
1
Understand the concept of chirality: A chiral molecule is one that cannot be superimposed on its mirror image. This is often due to the presence of a chiral center, typically a carbon atom bonded to four different groups.
Identify the characteristics of a chiral center: A chiral center, also known as a stereocenter, is a carbon atom that has four different substituents. This asymmetry allows for the existence of two non-superimposable mirror images, known as enantiomers.
Evaluate the statement about the plane of symmetry: A molecule with a chiral center does not have a plane of symmetry. If it did, it would be achiral, as the plane of symmetry would allow the molecule to be superimposed on its mirror image.
Consider optical activity: A chiral molecule is typically optically active, meaning it can rotate plane-polarized light. Therefore, the statement that it is always optically inactive is incorrect.
Analyze the possibility of stereoisomers: A molecule with a chiral center can have stereoisomers, specifically enantiomers. These are two stereoisomers that are mirror images of each other but not superimposable, confirming that the statement about not having any stereoisomers is false.