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ANSWERING ALL BIO/CHEM PAPER 1 DOUBTS :)

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the thing is that...in respiration it releases CO2 which is absorbed by the soda lime, immediately so no 'exchange' of gases takes place...causing the level to stay in the same position! but here...it is using up oxygen that's why level is rising!

don't mean to offend you btw... :oops:
No, no offense but I don't understand what u mean?:D
 
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yeah...air is in the tube where colored water is there....BUT the soda lime absorbs ALL the co2 in the air and therefore there is ONLY oxygen remaining...get it?
I mean in the other tube where there will be no change in level........co2 is absorbed there also so y it is not changed...or it will change but not noticable?
 
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No, no offense but I don't understand what u mean?:D
there is a gas in the lil tube (where colored water is there) when you take out the gas water ill automatically come up due to more pressure...

the gas in this case is oxygen...whn you are taking it out (seeds are using it) the level rises...

if you still don't get it then please don't confuse yourself :p juss remember wherever germinating seeds are present the level will rise :D
 
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I mean in the other tube where there will be no change in level........co2 is absorbed there also so y it is not changed...or it will change but not noticable?
the not noticable..cuz only i guss 0.04% is CO2, in air (correct me if m wrong)
basically i mean only a lil amount of CO2 is in air...so it won't be noticeable.
 
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there is a gas in the lil tube (where colored water is there) when you take out the gas water ill automatically come up due to more pressure...

the gas in this case is oxygen...whn you are taking it out (seeds are using it) the level rises...

if you still don't get it then please don't confuse yourself :p juss remember wherever germinating seeds are present the level will rise :D
Yes, yes I understand, but just don't get why can't we explain it with reference to carbon dioxide!!!!
 
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Yes, yes I understand, but just don't get why can't we explain it with reference to carbon dioxide!!!!
bcoz when carbon dioxide is released, it is absorbed immediately..

i will give you an example...for instance there is no soda lime...and nothing is present to absorb carbon dioxide..you put for exaple 10cm3 oh CO2 the level will drop bcoz there is more gas! now remove the 10cm3 of CO2 the level will be back to normal....

the same thing is happening here...it releases for instance 10cm3 of CO2 but at the same time it is being absorbed too...it means there is no extra gas so the level will be the same...

hope you get it now..
sorry but have to go :p

May Allah give us success in this world as well as the Hereafter...Aameen!

Good luck all (y)
 
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bcoz when carbon dioxide is released, it is absorbed immediately..

i will give you an example...for instance there is no soda lime...and nothing is present to absorb carbon dioxide..you put for exaple 10cm3 oh CO2 the level will drop bcoz there is more gas! now remove the 10cm3 of CO2 the level will be back to normal....

the same thing is happening here...it releases for instance 10cm3 of CO2 but at the same time it is being absorbed too...it means there is no extra gas so the level will be the same...

hope you get it now..
sorry but have to go :p

May Allah give us success in this world as well as the Hereafter...Aameen!

Good luck all (y)
Thnx, understood ......GOOD LUCK :) (y)
 
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Chemistry, May June 2004..
Q.29
How do we solve this question?
How to reAAAD that gas syringe >_>
 
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Chemistry, May June 2004..
Q.29
How do we solve this question?
How to reAAAD that gas syringe >_>


Chemistry ..
November 2007 , paper1 , Q 35
Assalam-o-alaikum wr wb...
you guys started studying chemistry? :p
we, well I didn't even give the bio exam yet :LOL:
 
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An excess of copper(II) oxide is added to dilute sulfuric acid to make crystals of hydrated
copper(II) sulfate.
The processes listed may be used to obtain crystals of hydrated copper(II) sulfate.
1 concentrate the resulting solution
2 filter
3 heat the crystals
4 wash the crystals
Which processes are needed and in which order?
A 1, 2, 3 and 4
B 1, 2, 4 and 3
C 2, 1, 2 and 3
D 2, 1, 2 and 4

COULD SOMEONE PLEASE EXPLAIN WHY ITS D..
wont it just become a solution since its soluble???
 
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Electricity from a power station passes through overhead cables to a substation and then to a
school where it is used to electrolyse concentrated hydrochloric acid using inert electrodes.
Which substances are used for the overhead cables and for the electrodes?
overhead cables electrodes
A aluminium copper
B aluminium platinum
C copper platinum
D platinum aluminium
WHY IS IT B.. isnt platinum suppose to be really expensive and schools can not afford it?
 
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