A product can be made by route 1 or route 2.
Route 1 has an atom economy of 62%. Its only by-product is hydrogen chloride, which the company can sell.
Route 2 has an atom economy of 100% but a percentage yield of only 30%. The unreacted reactants are separated and recycled back into the reactor.
Statement 1: Recycling the unreacted reactants means that little raw material is wasted in route 2, even though its yield is low.
Statement 2: Selling the hydrogen chloride increases the atom economy of route 1.
Statement 3: Route 2 makes no by-products.
Which statements are correct?
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
57 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.