17. Identify the relationship between these 21 . Which of the following is a mes

Question

17. Identify the relationship between these 21 . Which of the following is a meso two structure. compound? A)H B) Cl Cl A. Diastereomers B The same compound C. Enantiomers 9 D) 18. Which of the following groups has the highest priority using the Cahn-Ingold- Prelog rules? B) C)-OH ci D)-O-CH3 E) 22. Which of the following is a true statement? A) All chiral molecules possess a plane of symmetry B) All achiral molecules are meso. C) All molecules which possess a single chirality center of the S configuration are levorotatory D) A mixture of achiral compounds will be optically inactive. E) All molecules which possess two or more chirality centers will be chiral 19. The specific rotation of a pure substance is 1.68°. What is the observed rotation of a mixture containing 75% of this isomer and 25% of the ( isomer? A) +1.68C)+1.26 E)+042 B) 0° D) +0.84° 20. Which of the following is chiral? 23. Which of the following describes the A) cis-1-bromo-3-chlorocyclobutane B) trans-1-bromo-3-chlorocyclobutane C) cis-1,4-dimethylcyclohexane D) cis-1,3-dimethylcyclohexane E) trans-1,3-dimethylcyclohexane reaction shown below? A.) > 0 and A" > 0 B) AH>0 and AS

Explanation / Answer

Ans 17 : B) The same compound

The two compounds shown in the picture are same , as they have the same molecular formula. The connectivity of the atoms in the molecules is same , only there representation is different. They are also not mirror images of each other.

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