Enantiomers have identical chemical and physical properties in achiral environments, while diastereomers have different properties in chiral and achiral surroundings. What can be deduced based on the observation that A smells like citrus fruits, while B has an odor of pine trees?

1.A and B are diastereomers.
2.A and B are an exception to the rule and do not have the same properties.
3.The sense of smell cannot be used to deduce anything about the stereochemistry of A and B.
4.The receptors responsible for smell are chiral.
5.As can be observed by looking into a mirror, our noses are chiral.
Question 2Which of the following structures represents the lowest-energy form of (1S, 3S)-3-chloromethylcyclohexane?
Question 3What is the relation between the following two compounds?

1. diastereomers
2. enatiomers
3. identical
4. constitutional isomers
5. meso
Question 4How many stereoisomers exist for 5-methylhepta-2,3-diene?
1.1
2.2
3.3
4.4
5.8