Multiple Choice
In the context of chirality, which of the following best describes a 'semi-conservative' process?
5. Chirality
Chirality
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Which of the following statements correctly describes a chiral molecule?
A
A chiral molecule has an asymmetric carbon atom.
B
A chiral molecule is one that is superimposable on its mirror image.
C
A chiral molecule is always optically inactive.
D
A chiral molecule has identical substituents on all carbon atoms.
Verified step by step guidance1
Understand the concept of chirality: A chiral molecule is one that cannot be superimposed on its mirror image, much like left and right hands.
Identify the key feature of a chiral molecule: It typically has an asymmetric carbon atom, also known as a chiral center, which is a carbon atom bonded to four different groups.
Evaluate the statement about superimposability: A chiral molecule is not superimposable on its mirror image, which is the opposite of what the statement suggests.
Consider optical activity: Chiral molecules are usually optically active, meaning they can rotate plane-polarized light, contrary to the statement that they are always optically inactive.
Assess the substituents: A chiral molecule does not have identical substituents on all carbon atoms; instead, it has different groups attached to the chiral center, leading to asymmetry.
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