Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

2. Molecular Representations

Functional Groups

Organic Chemistry

2. Molecular Representations

Functional Groups

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Multiple Choice

Which of the following statements is true concerning lactic acid?

Lactic acid contains an aldehyde group.

Lactic acid contains a hydroxyl group and a carboxyl group.

Lactic acid is an example of an amine.

Lactic acid is a ketone.

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Verified step by step guidance

Identify the functional groups present in lactic acid by examining its chemical structure. Lactic acid has the molecular formula C₃H₆O₃.

Recognize that lactic acid is an alpha-hydroxy acid, which means it contains both a hydroxyl group (-OH) and a carboxyl group (-COOH).

Understand that an aldehyde group is characterized by the presence of a carbonyl group (C=O) bonded to a hydrogen atom, which is not present in lactic acid.

Note that an amine contains a nitrogen atom bonded to one or more alkyl or aryl groups, which is not a feature of lactic acid.

Recognize that a ketone contains a carbonyl group (C=O) bonded to two carbon atoms, which is also not present in lactic acid. Therefore, the statement that lactic acid contains a hydroxyl group and a carboxyl group is true.