QuestionJuly 1, 2025

Which of the following is a true statement? All chiral molecules possess a plane of symmetry. All achiral molecules are meso. All molecules which possess a single chirality center of the S configuration are levorotatory. A mixture of achiral compounds will be optically inactive. All molecules which possess two or more chirality centers will be chiral

Which of the following is a true statement? All chiral molecules possess a plane of symmetry. All achiral molecules are meso. All molecules which possess a single chirality center of the S configuration are levorotatory. A mixture of achiral compounds will be optically inactive. All molecules which possess two or more chirality centers will be chiral
Which of the following is a true statement? All chiral molecules possess a plane of symmetry. All achiral molecules are meso. All molecules which possess a single chirality center of the S configuration are levorotatory. A mixture of achiral compounds will be optically inactive. All molecules which possess two or more chirality centers will be chiral

Solution
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Answer

A mixture of achiral compounds will be optically inactive. Explanation 1. Evaluate each statement 1. Chiral molecules do not possess a plane of symmetry; they lack it. 2. Achiral molecules are not necessarily meso; meso compounds have multiple chirality centers and internal symmetry. 3. Chirality center configuration (R/S) does not determine optical activity direction (dextrorotatory/levorotatory). 4. A mixture of achiral compounds is optically inactive because achiral compounds do not rotate plane-polarized light. 5. Molecules with two or more chirality centers can be achiral if they have a plane of symmetry (meso compounds).

Explanation

1. Evaluate each statement<br /> 1. Chiral molecules do not possess a plane of symmetry; they lack it.<br /> 2. Achiral molecules are not necessarily meso; meso compounds have multiple chirality centers and internal symmetry.<br /> 3. Chirality center configuration (R/S) does not determine optical activity direction (dextrorotatory/levorotatory).<br /> 4. A mixture of achiral compounds is optically inactive because achiral compounds do not rotate plane-polarized light.<br /> 5. Molecules with two or more chirality centers can be achiral if they have a plane of symmetry (meso compounds).
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