Answer: A larger fraction of all reactant atoms ends up in the desired product.
- A The percentage yield of the desired organic product is very high
- B The reaction uses the fewest number of reagents
- C A larger fraction of all reactant atoms ends up in the desired product
- D The reaction is fastest
Correct answer: C. A larger fraction of all reactant atoms ends up in the desired product
Explanation: Atom economy measures how much of the reactant mass is incorporated into the useful product; a high atom economy means less waste, independent of the conventional percentage yield.
Classical smog is a reducing mixture of SO₂ and fog, while photochemical smog is an oxidising mixture generated by UV-driven reactions of NOx and hydrocarbons.
Concept context
Understand how human activities alter the atmosphere, water, and soil. Covers air pollutants, smog types, ozone depletion, acid rain, greenhouse effect, water and soil pollution, and the principles of green chemistry.