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Multiple Choice
Which of the following statements best describes chirality in organic molecules?
A
Chirality is the phenomenon where two molecules have the same molecular formula but different connectivity of atoms.
B
Chirality refers to the presence of a carbon atom bonded to four different groups, resulting in non-superimposable mirror images.
C
Chirality occurs when a molecule has a plane of symmetry, making it superimposable on its mirror image.
D
Chirality is the ability of a molecule to rotate plane-polarized light in a clockwise direction.
Verified step by step guidance
1
Understand the concept of chirality: Chirality in organic chemistry refers to a property of a molecule that makes it non-superimposable on its mirror image. This is similar to how left and right hands are mirror images but cannot be perfectly aligned on top of each other.
Identify the key feature of chiral molecules: 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: The first statement describes isomerism related to connectivity, not chirality. The second statement correctly identifies chirality as involving a carbon atom bonded to four different groups, leading to non-superimposable mirror images.
Analyze the third statement: It incorrectly associates chirality with a plane of symmetry. A chiral molecule lacks a plane of symmetry, which is why it is not superimposable on its mirror image.
Consider the fourth statement: It describes optical activity, which is a property of chiral molecules, but it does not define chirality itself. Chirality is about the structural feature of having a chiral center.