Environmental problems of alkanes

Question 1

what causes ozone to form

Answer 1

hydro carbons and nitrogen oxides reacting in the presence of sunlight

Question 2

why are fossil fuels that contain sulfur harmful

Answer 2

This is because it dissolves in the moisture and is converted into sulfuric acid(acid rain). Which can corrode buildings and kill fish

Question 3

how are oxides of nitrogen formed

Answer 3

high pressure and temperature in car engines causes nitrogen and oxygen from the air to react

Question 4

how to remove sulfur from flue gases in powerstations

Answer 4

mix it with calcium oxide (flue gas desulfurisation)

Question 5

what does incomplete combustion produce

Answer 5

Carbon (soot) (C) - causes breathing problems
carbon monoxide(CO)- poisonous. But can be removed from exhaust gases by catalytic convertors

Question 6

PRoblems with CFC’s and why r they banned now

alternative?

Answer 6

CFC’s cause damage to the ozone layer
and the advantages could couldnt outweigh the environmental problems
so they were banneddddddd

An alternative to this would be HFC’s which do not contain chlorine.