Author Question: Reduction of which of the following aldoses provides an optically active alditol? A) 1 B) ... (Read 124 times)

Ebrown

  • Hero Member
  • *****
  • Posts: 567
Reduction of which of the following aldoses provides an optically active alditol?
   
 
   
  A)
  1
  B)
  2
  C)
  3
  D)
  1 and 2
  E)
  3 and 4

Question 2

The configurations at C2, C3, and C4 of
   
   
   
   
  are:
  A)
  2R, 3R, 4R
  B)
  2R, 3S, 4R
  C)
  2S, 3R, 4S
  D)
  2S, 3R, 4R
  E)
  2R, 3S, 4S

Question 3

A Newman projection formula for
   
   
   
   
  is:
  A)
   
 
  D)
   
 
  B)
   
 
  E)
   
 
  C)
   
 

Question 4

The term that best describes the relationship between
   
   
   
   
   
  is
  A)
  conformers.
  B)
  epimers.
  C)
  enantiomers.
  D)
  meso forms.
  E)
  constitutional isomers.

Question 5

The equilibrium rotation of an aqueous solution of a and bD-glucose is +50, and the rotations of the pure a and b forms are +102 and +24, respectively.
  Assuming no other forms are present, the percent a form at equilibrium is:
  A)
  66.7
  B)
  50.0
  C)
  22.5
  D)
  33.3
  E)
  24.0

Question 6

Oxidation of optically active D-erythrose with nitric acid produces optically inactive meso-tartaric acid (below). What is the structure of D-erythrose?
   
   
   
   
   
   
  A)
   
 
  D)
   
 
  B)
   
 
  E)
   
 
  C)
   
 

Question 7

The difference between a and b-glucopyranose is:
  A)
  the stereochemistry at the anomeric carbon
  B)
  the number of carbons in the ring
  C)
  the position of all the OH's on the ring
  D)
  all of these reasons
  E)
  none of these reasons



ktidd

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

a

Answer to Question 2

b

Answer to Question 3

d

Answer to Question 4

b

Answer to Question 5

d

Answer to Question 6

b

Answer to Question 7

a



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

The human body produces and destroys 15 million blood cells every second.

For a complete list of videos, visit our video library