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Preparing For Chemistry 5070 P1 / P2

T

Tharindu

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discuss the social, economic and environmental advantages and disadvantages of recycling metals
e.g. aluminium and copper
 
K

khanrocks20

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Explain why this reaction is exothermic in terms of the energy changes that take place
during bond breaking and bond making.
 
M Haseeb Javed

M Haseeb Javed

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syed1995 said:
idher Masha Allah say 33-34 aa jatay hain .. Lekin Insha Allah kal ka paper aisa aayega kay sab kay 40/40 aayeingay :D Saray repeat questions hongay ^^
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Repeat kum hi the balke is bar unhon ne kafi tricky paper bnane ki koshish ki thi!
 
Pallavi Lewis

Pallavi Lewis

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multixamza01 said:
Back to Topic .

Acid Rain :
Sulfur dioxide and Oxides of Nitrogen in the air mix with rainwater to form sulfuric acid and nitric acid respectively . This acid mixture is dilute in nature and so doesn't show any great harm but has many affects :

Limestone (Calcium Carbonate ) is an important component of cement and dissolves in acid rain (acid-carbonate reaction). So buildings and statues corrode .
Galvanished metals corrode more easily .
Fish cannot survive in acidic rainwater .
K+ and Ca+ that are important nutrients for plants get dissolved in acid rain water and get washed away .

Now next would be Ozone Depletion !
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Really helpfull! ;)
 
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