Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
In the context of organic chemistry, which of the following reactions is an example of a light-dependent reaction?
A
Hydrogenation of alkenes
B
Photosynthesis in chloroplasts
C
Grignard reaction
D
Friedel-Crafts acylation
Verified step by step guidance
1
Understand the concept of light-dependent reactions: These are reactions that require light to proceed. In organic chemistry, this often involves photochemical reactions where light energy is absorbed to initiate a chemical change.
Identify the reactions listed: Hydrogenation of alkenes, Photosynthesis in chloroplasts, Grignard reaction, and Friedel-Crafts acylation.
Analyze each reaction: Hydrogenation of alkenes typically involves the addition of hydrogen in the presence of a catalyst, not light. Grignard reactions involve organomagnesium compounds reacting with electrophiles, and Friedel-Crafts acylation involves the introduction of an acyl group into an aromatic ring, both of which do not require light.
Focus on photosynthesis: Photosynthesis in chloroplasts is a well-known light-dependent process where light energy is converted into chemical energy, specifically in the light-dependent reactions of photosynthesis.
Conclude that among the given options, photosynthesis in chloroplasts is the only example of a light-dependent reaction, as it directly involves the absorption of light to drive the chemical process.