Green Methods in Chemistry — DU Skill Enhancement Courses Previous Year Question Papers

2. Attempt three questions in all. 1. (i)(a)Which of the following is a challenge for green chemists? (i) Awareness of the benefits of green chemistry (ii) Developing chemicals that are recyclable (iii) Training for cleaning up chemical spills (iv) Knowing when to reduce and eliminate hazardous waste (b) What is the U.S. Presidential Green Chemistry Challenge Award? (i) An award related to recycling (ii) An award for industry only (iii) The only chemistry award given by the (iv) Challenges companies to become fuel efficient (c) Since 1996, Presidential Green Chemistry Challenge Award winning technologies have helped save or eliminate at least 1.3 billion pounds of hazardous chemicals and solvents (d) Environmental benefits of green chemistry include. (1) Fewer raw materials and natural resources used (il) Cleaner production technologies & reduced emissions (ili) Smaller quantities of hazardous waste to be treated and disposed of (iv) All of the above (e) The first listed of the 12 Principles of Green (1) Prevent waste (iii) Atom economy (iv) Benign solvent (f) Green chemistry is more expensive than traditional chemistry? (ii) Answer the following :- (a) - and moral arguments are often used when discussing sustainability and green chemistry? (b) Benzene, a — substance, is an important industrial solvent used in the production of pharmaceuticals, plastics, and dyes. (c) . is an excellent 'green' solvent as well as a greenhouse gas? (d) Shortly after mid-night in 1984, a reaction caused poisonous methyl isocyanate gas to leak from a factory in this city, - causing 3,700 (e) Green Chemistry reduce risk by -