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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 363307 times)

Offline Ghost Of Highbury

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #525 on: May 04, 2010, 11:13:44 am »
5g) Manganese Oxide/Catalysr, reasons : Black solid(Transition Metals have color), Effervescence because of Oxygen released as it speeds up the breaking with H2O2, glowing splint relit because of oxygen again.

Q6) This is a very common question, learn the steps to extract a color from a solution.

       Add water, crush the berries, finally, decant it to remove the insoluble waste. U can also warm it.

    b) use the indicator in an acid, base and a neutral solution , if its an effective indicator it shud give out three different colors.
« Last Edit: May 04, 2010, 11:17:18 am by A@di »
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Offline CatAly$t

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #526 on: May 04, 2010, 11:15:33 am »
does anybody know who got A* in chemistry??

i've never heard anybody got an A* in chem....

is it ossible to get an A* or is it very hard??
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Offline saywhatsaykobe

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #527 on: May 04, 2010, 11:17:31 am »
Many have gotten A stars. You are an assured an A* if u get 90 or above...
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Offline Ghost Of Highbury

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #528 on: May 04, 2010, 11:19:03 am »
There are many who get A* in Chemistry, i got an A* too. Yes, above 90%ile, i got 95%ile.
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Offline CatAly$t

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #529 on: May 05, 2010, 04:05:23 pm »
Quote from: A@di on May 04, 2010, 11:19:03 am
There are many who get A* in Chemistry, i got an A* too. Yes, above 90%ile, i got 95%ile.

woww man!! so now i can ask u questions....
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Offline Ghost Of Highbury

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #530 on: May 05, 2010, 04:06:06 pm »
U can ask anyone, specially Nid. ~A.F~ and The Mysterious Dude are great too.
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #531 on: May 05, 2010, 04:08:26 pm »
Bring 'em on.
I got 95 too...

but i take time to answer cuz im preparing myself for physics(my not so good subject) ::)
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Offline CatAly$t

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #532 on: May 06, 2010, 08:52:17 am »
can somebody describe to me what is fermentation in  one sentence??

thx
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Offline Ghost Of Highbury

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #533 on: May 06, 2010, 09:02:02 am »
Fermentation is the breakdown of organic material with effervescence and release of heat.


For years, ethanol has been made by fermentation of glucose.

Glucose --> Ethanol + Carbondioxide
 

          (Yeast, Absence of Air)
« Last Edit: May 06, 2010, 10:40:21 am by A@di »
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Offline haris94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #534 on: May 06, 2010, 09:03:54 am »
the conversion of a carbohydrate such as sugar into an acid or an alcohol  (from teacher's notes)

the anaerobic conversion of sugar to carbon dioxide and alcohol by yeast  (from a book)
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Offline CatAly$t

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #535 on: May 06, 2010, 10:32:20 am »
thanks!!
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Offline The Golden Girl =D

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #536 on: May 06, 2010, 02:53:41 pm »
there is smthn i really need  and i've been tryin my best to find it but i still didn't find it ........ i did chem ig paper 1 june & November   1999 as well as 2000  and i need the answers for these papers  :-\



can someone plz give me a link of the m.s. of these two papers  ?  :'(

thx alot   :-[
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #537 on: May 06, 2010, 04:12:16 pm »
I'm not sure if these are available.

Post your questions here, I'll answer as soon as I can :)

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Offline haris94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #538 on: May 06, 2010, 08:37:34 pm »
Quote from: the golden girl on May 06, 2010, 02:53:41 pm
there is smthn i really need  and i've been tryin my best to find it but i still didn't find it ........ i did chem ig paper 1 june & November   1999 as well as 2000  and i need the answers for these papers  :-\



can someone plz give me a link of the m.s. of these two papers  ?  :'(

thx alot   :-[

here
http://www.freeexampapers.com/Dndex.php?d=SUdDU0UvQ2hlbWlzdHJ5L0NJRS8xOTkzLTIwMDM=
this file contains ms for p1, p3, and p6 from 1993-2000
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Offline winnie101

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #539 on: May 06, 2010, 10:00:19 pm »
can someone plz explain to me the nitrogen cycle
Thanks
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