Which of the following gases can be detected by its fruit-like odor and is produced from the burning of organic materials?

The gas that can be detected by its fruit-like odor and is produced from the burning of organic materials is indeed acetaldehyde. This compound is an organic chemical that emits a sweet, fruity scent, making it identifiable by smell. Acetaldehyde is commonly produced during the decomposition of organic matter and through various combustion processes involving organic materials.

In contrast, hydrogen sulfide has a distinct odor resembling rotten eggs, carbon dioxide is odorless and colorless, making it challenging to detect without specialized equipment, and ammonium hydroxide has a sharp, pungent odor that is quite different from the sweet smell of acetaldehyde. Understanding the characteristics of these gases is vital for hazardous material response and safety in firefighting environments.