Which of the structures above are identical? 1.A and C only 2.B ...

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Which of the structures above are identical?
  1.A and C only
  2.B and D only
  3.A and D only
  4.B, C, and D only
  5.all are the same
 

Question 2

What is the relationship between the two compounds shown below?
 
  1.they are identical
  2.they are constitutional isomers
  3.they are nonsuperimposable mirror images of each other
  4.they are different conformations of the same compound
  5.they have different atom connectivity

Question 3

What are the absolute configurations of the chiral centers in the molecule shown below?
 
  1.1: R, 2: R
  2.1: R, 2: S
  3.1: S, 2: S
  4.1: S, 2: R
  5.because of the ring structure, the compound does not have chiral centers

Question 4

Despite its name, ascorbic acid (vitamin C) is not a carboxylic acid, but rather has the structure shown below. How many stereoisomers of this compound are possible?
 
  1.1
  2.2
  3.3
  4.4
  5.8

Question 5

How many stereogenic centers are present in the following molecule?
 
  1.0
  2.1
  3.2
  4.4
  5.7

Question 6

Which of the following statements about enantiomers is false?
  1.They have identical melting points.
  2.They have identical boiling points.
  3.The magnitude of their specific rotations is identical.
  4.They have identical densities.
  5.They react at the same rate with optically active reagents.

[SeanoH09]

Answer to Question 1

5

Answer to Question 2

3

Answer to Question 3

4

Answer to Question 4

4

Answer to Question 5

5

Answer to Question 6

5

[newbem]

Great answer, keep it coming

[mohan]

TYSM