Air and Water Flashcards
1
Q
composition of air
A
78 nitrogen
1 noble gas
21 oxygen
2
Q
two tests for water
A
- anhydrous copper (ii) sulphate turns white to blue when water is added
- anhydrous cobalt (ii) chloride turns from blue to pink when water or aqueous solution is added
3
Q
what does anhydrous mean
A
does not contain water
4
Q
3 main pollutants
A
carbon monoxide
sulfur dioxide
oxides of nitrogen
5
Q
source of carbon monoxide
A
incomplete combustion of coal
6
Q
adverse effects of carbon monoxide
A
poisonous because it combines with haemoglobin in the red blood cells to prevent the transport of oxygen
7
Q
source of sulfur dioxide
A
complete combustion of coal
8
Q
adverse effects of sulfur dioxide
A
acid rain :
corrosion of buildings
kills conifer trees
9
Q
source of oxides of nitrogen
A
reaction of nitrogen and oxygen in car engines
10
Q
adverse effects of oxides of nitrogen
A
acid rain :
photochemical smog
irritates lungs and eyes
breathing difficulties, especially those with asthma.
