IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Sciences => Topic started by: Omenbreed898 on May 31, 2009, 01:26:09 pm
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Can you plz tell me the important polymers that we have to know
like starch nylon teryll....etc !! with diagrams plz !!
and can u explain what they want when they tell us to draw when they give us the valances 2+8...
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guyz helpppp plzzzzzzz evn i gt probz here.. :-\
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Can you plz tell me the important polymers that we have to know
like starch nylon teryll....etc !! with diagrams plz !!
and can u explain what they want when they tell us to draw when they give us the valances 2+8...
Like in addition polymerisation, they'll give you monomers and tell u to find polymers so you have to cut out the double bond and if they ask monomer from polymer add the double bond. for condensation polymerisation, starch, glucose.... is to be studied.
Valencies- They give u the electronic structure of the element that helps in drawing BONDING
Plz +rep if it helped !!! ::)
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thnkz guru007 but guyz if u hv probs in chem plz post in da topic wer it says "Chem ques HERE ONLY", u ll get replys more faster...gud luck evry1!! ;)
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gt ya bt cud yu gimme an example as well..plzzzzzz
or cud yu solve one of them and scan o anything
dat yu cn do bt an example to make it clear.. :)
Thanks alot
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Ya if you can show us an example of the valency thingy then that would help
Thanks
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the problem is wen ure abt to post ur ques..there are olready five posts dat r put up
so if u wnt ur thing don't u gt to repeat urslf agn n agn
n diz iz a clear place for ur ans ..it can b later deleted by the admin..
itz juz today dat wer're doin this,i know itz creating problems bt im gona be selfish :P
cuz i truly truly suck at chemi..!!!
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sorry bout the title this was my first time but anyways polymers is obviously Chem
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visit http://www.docbrown.info/page01/ElCpdMix/EleCmdMix.htm for bonding
and http://www.docbrown.info/page04/OilProducts/ExtraOrganic.htm for organic chemistry
great notes......docbrown's clinic is awesome
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the problem is wen ure abt to post ur ques..there are olready five posts dat r put up
so if u wnt ur thing don't u gt to repeat urslf agn n agn
n diz iz a clear place for ur ans ..it can b later deleted by the admin..
itz juz today dat wer're doin this,i know itz creating problems bt im gona be selfish :P
cuz i truly truly suck at chemi..!!!
hmmm lol i guess ur rite..i hv no probs..just as long as da admins or moderators dnt hv a prob...gud luck im sure u all v du well!!! ;)
@nid404 thnkz 4 da sites gr8 help... :)
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Ya if you can show us an example of the valency thingy then that would help
Thanks
eg- 2,8,8,2 so 2 is the outer electron and it needs 6 more to become stable
now they'll give you another element 2,6 to make it stable.
The nos. may vary so you can take 3 or 2 structures of an element and this will help to deduce formula !!
Same for covalent bonding
+rep if it helped !!
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chem exam is over :P