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Author Topic: Chemistry Paper 1  (Read 6867 times)

nid404

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Re: Chemistry Paper 1
« Reply #45 on: June 10, 2009, 04:11:38 pm »
Quote from: Naruto on June 10, 2009, 03:05:37 pm
hey
i have attached the questions that i dint understood...plzzz telll me the answer so that i can check that whether the answer that i have are right or wrong :-\ and plzzz try to explain your answers thanks

25 is A. Magnesium is more reactive than carbon..carbon cannot reduce magnesium from its oxide. So the mixture remains black and there's no change in limewater

37 is A. Both can be used as fuels

39 is D. Just add the products' molecular formula. CH4 and 2 molecules of C2H4 will give C5H12
« Last Edit: June 10, 2009, 04:23:48 pm by nid404 »
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Offline qwert101

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Re: Chemistry Paper 1
« Reply #46 on: June 10, 2009, 04:14:26 pm »
Quote from: Naruto on June 10, 2009, 04:05:58 pm
ok now i have attached the question so plzz check them above...
thank U :)

all A

last one is D
« Last Edit: June 10, 2009, 04:16:15 pm by qwert101 »
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Offline Ghost Of Highbury

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Re: Chemistry Paper 1
« Reply #47 on: June 10, 2009, 04:14:41 pm »
Quote from: Naruto on June 10, 2009, 03:05:37 pm
hey
i have attached the questions that i dint understood...plzzz telll me the answer so that i can check that whether the answer that i have are right or wrong :-\ and plzzz try to explain your answers thanks
okk no idea abt the 37th one
but the rest 2
q25.) i think its A...because Magnesium oxide cannot be reduced


q38.) ans - "D"  --  C5H12 ==> C2H4 + C2H4 + CH4
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Offline Ghost Of Highbury

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Re: Chemistry Paper 1
« Reply #48 on: June 10, 2009, 04:15:36 pm »
its written 2 molecules of ethene so wont it be "D"
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nid404

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Edited Post
« Reply #49 on: June 10, 2009, 04:15:46 pm »
@ Yu Si-hun: Delete the sites right away or u will be banned
« Last Edit: June 10, 2009, 04:24:33 pm by past-papers »
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Offline Petrol

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Re: Chemistry Paper 1
« Reply #50 on: June 10, 2009, 04:16:28 pm »
THIS IS IGCSE CHEM?
if not WHY is it in the IGCSE thread.. can u plz move it?
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Offline Ghost Of Highbury

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Edited Post
« Reply #51 on: June 10, 2009, 04:16:57 pm »
Quote from: nid404 on June 10, 2009, 04:15:46 pm
@ Yu Si-hun: Delete the sites right away or u will be banned
i strongly feel u shud delete this sites..

u r so surely gonna be banned...

nid..please check my answer posted above
thank u
« Last Edit: June 10, 2009, 04:25:10 pm by past-papers »
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Offline qwert101

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Re: Chemistry Paper 1
« Reply #52 on: June 10, 2009, 04:17:05 pm »
we can read- dont have to space it out ???
« Last Edit: June 10, 2009, 04:24:49 pm by past-papers »
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nid404

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Re: Chemistry Paper 1
« Reply #53 on: June 10, 2009, 04:17:41 pm »
Quote from: eddie_adi619 on June 10, 2009, 04:14:41 pm
Quote from: Naruto on June 10, 2009, 03:05:37 pm
hey
i have attached the questions that i dint understood...plzzz telll me the answer so that i can check that whether the answer that i have are right or wrong :-\ and plzzz try to explain your answers thanks
okk no idea abt the 37th one
but the rest 2
q25.) i think its A...because Magnesium oxide cannot be reduced


q38.) ans - "D"  --  C5H12 ==> C2H4 + C2H4 + CH4

yes naruto it's D for 38..my bad. I didn't see there were two molecules of ethene
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Offline Ghost Of Highbury

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Re: Chemistry Paper 1
« Reply #54 on: June 10, 2009, 04:18:35 pm »
thank u..
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nid404

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Re: Chemistry Paper 1
« Reply #55 on: June 10, 2009, 04:20:37 pm »
pls delete that post christy...ull have to delete it anyway cuz it's got the sites in it
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Offline Christy

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Re: Chemistry Paper 1
« Reply #56 on: June 10, 2009, 04:21:32 pm »
sorry ..... :D ... was kinda fustrated at the link :P
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Offline Ghost Of Highbury

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Re: Chemistry Paper 1
« Reply #57 on: June 10, 2009, 04:24:01 pm »
its deleted

a quick reaction by the admin

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Offline past-papers

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Re: Chemistry Paper 1
« Reply #58 on: June 10, 2009, 04:25:38 pm »
Once again, please no cheating.

Thanks
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Offline Christy

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Re: Chemistry Paper 1
« Reply #59 on: June 10, 2009, 04:26:19 pm »
Quote from: eddie_adi619 on June 10, 2009, 04:24:01 pm
its deleted

a quick reaction by the admin



hehe ... she told me to delete it so i deleted it ... no admin did tht :P
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