[study-freak]

Originally Posted by Jeidor

1) D. le Chatelier's Principle
2) C. Production of vinyl chloride is an industrial process. Hence monitoring for maximum yield is important as well as explosions etc. D in this question would also require such monitoring but not to the extent that C would require.
3) D. conquering chem says so.

Originally Posted by Pwnage101

1 is C because none of the others require spoecificproducts to be formed - A, no one cares what is produced, as long as it burns, B same - its not really monitored in real life, and D - as long as you have the right temperature and materials, it will be fine - C is teh answert because so much can go wrong - different poroducts will be produced under different conditions (ewspecially since we r using oxygen - can turn into ethanol or ethanoic acid), which is no good if there is one specific product required

3 well D is a natural source of SO2 - B and C relate to NO2 and are thus incorrect - so we have to choose between natural and industrial sources of SO2 - and to be honest, its tough, but they could justify naural causes because rosting of sulfides i believe can now be controlled via scrubbers and the like.

Originally Posted by http://www.environment.gov.au/atmosphere/airquality/publications/sulfurdioxide.html

About 99% of the sulfur dioxide in air comes from human sources. The main source of sulfur dioxide in the air is industrial activity that processes materials that contain sulfur, eg the generation of electricity from coal, oil or gas that contains sulfur.

The Australian government strongly disagrees. (B) would be the most consistent with their information.