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

3. Acids and Bases

Organic Chemistry Reactions

Organic Chemistry

3. Acids and Bases

Organic Chemistry Reactions

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Multiple Choice

In the context of organic chemistry reactions, what is the primary difference between photosynthesis and chemosynthesis?

Photosynthesis occurs in the absence of oxygen, while chemosynthesis requires oxygen.

Photosynthesis uses light energy, while chemosynthesis uses chemical energy.

Photosynthesis produces glucose, while chemosynthesis produces proteins.

Photosynthesis is an exothermic reaction, while chemosynthesis is endothermic.

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Verified step by step guidance

Understand the basic definitions: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy stored in glucose. Chemosynthesis, on the other hand, is the process by which certain organisms synthesize carbohydrates by using energy obtained from the oxidation of inorganic substances, rather than light.

Identify the energy source: Photosynthesis uses light energy, typically from the sun, to drive the synthesis of glucose from carbon dioxide and water. Chemosynthesis relies on chemical energy derived from reactions involving inorganic molecules, such as hydrogen sulfide or methane.

Consider the products formed: In photosynthesis, the primary product is glucose, a simple sugar that serves as an energy source for the plant. Chemosynthesis typically results in the formation of carbohydrates, but the specific products can vary depending on the organisms and the chemicals involved.

Examine the thermodynamics: Photosynthesis is generally considered an endothermic process because it requires the absorption of light energy to drive the reaction. Chemosynthesis can be either exothermic or endothermic, depending on the specific chemical reactions involved.

Clarify the environmental conditions: Photosynthesis typically occurs in environments where light is available, such as on the surface of leaves. Chemosynthesis occurs in environments where light is not available, such as deep-sea hydrothermal vents, where organisms rely on chemical energy sources.