Air and Water Flashcards
1
Q
How is the CO gas formed?
A
incomplete combustion of fossil fuels
2
Q
Examples of sources of CO:
A
car engines , gas boilers
3
Q
Effect of CO?
A
binds more strongly to Hb therefore less O2 can bind
4
Q
What does sulfuric acid, a component of acid rain, do?
A
erodes stone work
increases metal corrosion
increases leaching of soil
harms animal and plant
5
Q
what effects do SO2 have?
A
breathing difficulties
and can trigger asthma attacks
toxic gas
6
Q
What can NOx cause?
A
acid rain
7
Q
why is chlorine ions added to drinking water?
A
to sterilise water to kill harmful bacteria
8
Q
why is fluorine ions added to drinking water?
A
fluoride helps protect against tooth decay
9
Q
how are gases fractionally distillated?
A
- cooled to temp below -200 by increasing pressure and passing over cold water before releasing pressure - to let them condense as liquids
-co2 and water removed as it can solidify and break machinery used - mixture of the gases nitrogen,argos and o2 warmed slowly
-n2 boils off first - collected at top
-argon boils off next - then o2 at the bottom as liquid
10
Q
what are causes of CH4?
A
rice fields
cattle farming
landfills
