Table of contents

1. A Review of General Chemistry(0)
2. Molecular Representations(0)
3. Acids and Bases(0)
4. Alkanes and Cycloalkanes(0)
5. Chirality(0)
6. Thermodynamics and Kinetics(0)
7. Substitution Reactions(0)
8. Elimination Reactions(0)
9. Alkenes and Alkynes(0)
10. Addition Reactions(0)
11. Radical Reactions(0)
12. Alcohols, Ethers, Epoxides and Thiols(0)
13. Alcohols and Carbonyl Compounds(0)
14. Synthetic Techniques(0)
15. Analytical Techniques:IR, NMR, Mass Spect(0)
16. Conjugated Systems(0)
17. Ultraviolet Spectroscopy(0)
18. Aromaticity(0)
19. Reactions of Aromatics: EAS and Beyond(0)
20. Phenols(0)
21. Aldehydes and Ketones: Nucleophilic Addition(0)
22. Carboxylic Acid Derivatives: NAS(0)
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides(0)
24. Enolate Chemistry: Reactions at the Alpha-Carbon(0)
25. Condensation Chemistry(0)
26. Amines(0)
27. Heterocycles(0)
28. Carbohydrates(0)
29. Amino Acids(0)
30. Peptides and Proteins(0)
31. Catalysis in Organic Reactions(0)
32. Lipids (0)
33. The Organic Chemistry of Metabolic Pathways(0)
34. Nucleic Acids(0)
35. Transition Metals(0)
36. Synthetic Polymers(0)

28. Carbohydrates

Reducing Sugars

28. Carbohydrates

Reducing Sugars: Videos & Practice Problems

Video Lessons Practice Worksheet

Reducing Sugars Practice Problems

10 problems

1PRACTICE PROBLEM

Write the name of the following monosaccharide and determine whether it is a reducing or a non-reducing sugar.

Chemical structure of α-D-galactose, a reducing sugar in organic chemistry.

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2PRACTICE PROBLEM

Determine whether the molecules below are reducing sugars or not.

(i) α-D-galactopyranose

(ii) methyl β-D-xylofuranoside

3PRACTICE PROBLEM

Identify whether the following sugars are reducing or not. What can you say about the common name trehalose of (i)?

4PRACTICE PROBLEM

Determine the name of the molecule given below and state whether it is a reducing sugar or not.

5PRACTICE PROBLEM

Give the plausible name of the molecule given below and determine whether it is a reducing sugar or not.

6PRACTICE PROBLEM

A hexose is extracted from a plant called Erythrina variegata. This hexose undergoes mutarotation; does not react with bromine water; and produces D-mannonic acid and D-gluconic acid when reacted with Fehling's solution. Identify the hexose.

7PRACTICE PROBLEM

An unknown plant sample is subjected to acidic hydrolysis and one of the water-soluble components found in the hydrolysate is fructose. Provide a Fischer projection structure for the open-chain form of fructose.

The following information is known about fructose:

i. Has a molecular formula of C₆H₁₂O₆

ii. Exhibits mutarotation.

iii. Unreactive with Br₂/H₂O.

iv. Reduces Fehling's solution to give D-gluconic acid and D-mannonic acid.

8PRACTICE PROBLEM

i. Draw the structure of 4-O-(α-D-mannopyranosyl)-D-talopyranose.

ii. Is it a reducing sugar?

iii. Can it undergo mutarotation?

9PRACTICE PROBLEM

i. Provide the structure of α-D-ribofuranosyl- β-D-galactopyranoside.

ii. Is it a reducing sugar?