Chemistry: Post your doubts here!

[A star]

urrgghh anyone pls tell me the best way to revise chemistry
if i do the past papers of only my variant i.e. variant 2 do u think i have it covered that way??
its just that a levels never seems like its fully prepared u know... like even at the last moment there's always this one thing left... this onw thing that u don't know .... if u know wat i mean.... i mean sure i m giving them the first time but i am already starting to get this feeling u know and even wen i asked around everyone said the same thing... so plz help me out on some tips here.... preferably on paper 2 at the moment. thanks
and Best of Luck all of u. Remember me and everyone else in your prayers

there is a better option do that variant which has lowest threshhold as it is usually more difficult.
well i kinda have it but dont have a scanner to post it :/
it stats all reaction conditions and you just fill in reactions. well 3 days for p1 hmmm i am leaving two days i hope to God it will b enough

 

[A star]

heres a question its a bit tricky but not very difficult
ps i know the answer so dont tag me in the answers

Q name a non metallic chloride which doesnot hydrolyse with water?

 

[syed1995]

ooo thankuu I have actually done the revision thingy but yeah i think i'll do the one section a day but according to my schedule i only have till friday to do aall my chem bcz need to leave 3 days of prep for maths too... -.- all of em lined up as they r in this horrible datesheet :O
anyways thanks for the tip... and wat do u think about the variants parrt? like should i do only my variant then wil it b enough? (although i know its never enough) but still hav i got my bases covered with that?
and one more thing if u have any kind of like worksheet or fill in the blanks kind of thing for the Organic OR INORGANIC equations will u post it? pwettty please?? ^_^ *desperate calls*

You won't prepare for physics?

 

[syed1995]

heres a question its a bit tricky but not very difficult
ps i know the answer so dont tag me in the answers

Q name a non metallic chloride which doesnot hydrolyse with water?

Lol I have no idea..

Lead Chloride?

 

[A star]

Lol I have no idea..

Lead Chloride?

Non metalic dude

 

[PhyZac]

ooo thankuu I have actually done the revision thingy but yeah i think i'll do the one section a day but according to my schedule i only have till friday to do aall my chem bcz need to leave 3 days of prep for maths too... -.- all of em lined up as they r in this horrible datesheet :O
anyways thanks for the tip... and wat do u think about the variants parrt? like should i do only my variant then wil it b enough? (although i know its never enough) but still hav i got my bases covered with that?
and one more thing if u have any kind of like worksheet or fill in the blanks kind of thing for the Organic OR INORGANIC equations will u post it? pwettty please?? ^_^ *desperate calls*

You are welcome. And well, if you have time, do all variants, I mean as you said "It is never enough". Solving papers will help you find your weak point.
I wish I had, but I don't have any kind of such worksheet.
And one more thing, do not study one subject a day, it is way better to study some of every subject!!

 

[iKhaled]

heres a question its a bit tricky but not very difficult
ps i know the answer so dont tag me in the answers

Q name a non metallic chloride which doesnot hydrolyse with water?

Carbon tetrachloride ?

 

[A star]

Carbon tetrachloride ?

yup u got it congos first person other then me who answered correct

 

[daredevil]

there is a better option do that variant which has lowest threshhold as it is usually more difficult.
well i kinda have it but dont have a scanner to post it :/
it stats all reaction conditions and you just fill in reactions. well 3 days for p1 hmmm i am leaving two days i hope to God it will b enough

huh well which of them has the lowest threshold.... and with the difficulty thing u just mentioned i am guessing it to be variant 3 -.- thanks for the advise though... i might just do a few of those too but will stick to the easier ones to keep the confidence or whatever remnants of it i have left
ohh bummer :/
ummm.. well maybe it will be for u but i decided not to take it for granted... u never know wat will come up let's just hope it all goes well enough for me to continue breathing after exiting the hall -_-

 

[iKhaled]

yup u got it congos first person other then me who answered correct

 

[syed1995]

huh well which of them has the lowest threshold.... and with the difficulty thing u just mentioned i am guessing it to be variant 3 -.- thanks for the advise though... i might just do a few of those too but will stick to the easier ones to keep the confidence or whatever remnants of it i have left
ohh bummer :/
ummm.. well maybe it will be for u but i decided not to take it for granted... u never know wat will come up let's just hope it all goes well enough for me to continue breathing after exiting the hall -_-

Hah I have my GP paper exactly after Chemistry paper.. so I will be entering the hall at around 8:30am and exiting at around 1pm .. God help me

 

[daredevil]

Hah I have my GP paper exactly after Chemistry paper.. so I will be entering the hall at around 8:30am and exiting at around 1pm .. God help me

ooo God that sucks like BIG TYM!! :O and u hav maths too ryt?
afternoon maths and the next day morning chm and afternoon GP!! Gosh wat the hell were these guys thinking when making the paper!! wwere they like suffering from sth or wat!! :O

 

[syed1995]

ooo God that sucks like BIG TYM!! :O and u hav maths too ryt?
afternoon maths and the next day morning chm and afternoon GP!! Gosh wat the hell were these guys thinking when making the paper!! wwere they like suffering from sth or wat!! :O

Yea.. And next day Physics Theory

The message from CIE is clear. Don't take Sciences or our timetable will make you go mad.

 

[Ashique]

1)can any one tell me the mechanism of seperation whether adsorbtion or partionin HPLC
2) the stationery phase in HPLC
please?

In HPLC, you have-
1) The stationary phase: a non-volatile liquid. This is packed tightly into a column. This column is a few millimeters in diameter and is up to 30-40 cm long.
2) The mobile phase: usually a polar solvent (it is a liquid) is chosen for the mobile phase. It's usually methanol.

So the mobile phase has to be forced through the columns at high pressures (at about 400 atm). The column provides a large surface area for the partitioning to occur. Partitioning is basically separating the mobile phase into its components. The components are usually detected by measuring the absorbance of ultraviolet radiation through a cell at the end of the column. This data is logged into a computer. The computer then usally form peaks for each component present in the mobile phase. The area under each peak is proportional to the amount of solute particles emerging from the column.

Note: The column for the HPLC is much shorter than the column used in GLC

Hope this helps!

 

[daredevil]

Yea.. And next day Physics Theory

The message from CIE is clear. Don't take Sciences or our timetable will make you go mad.

oooo.... sucks to be you!! and i thought i had it hard
yeah well their messenger got held up in the train or sumfin bcz this is a little too late for the warning bells

 

[syed1995]

oooo.... sucks to be you!! and i thought i had it hard
yeah well their messenger got held up in the train or sumfin bcz this is a little too late for the warning bells

If I am alive and fine and *in one piece* on the 10th .. It'd be miracle...

 

[daredevil]

If I am alive and fine and *in one piece* on the 10th .. It'd be miracle...

Yeah i'd say

 

[A star]

Hah I have my GP paper exactly after Chemistry paper.. so I will be entering the hall at around 8:30am and exiting at around 1pm .. God help me

our school give Gp as our option to do it now or in in Nov. when i saw the time table while filling the form i removed gp from my list instantly xD

 

[snowbrood]

ooo God that sucks like BIG TYM!! :O and u hav maths too ryt?
afternoon maths and the next day morning chm and afternoon GP!! Gosh wat the hell were these guys thinking when making the paper!! wwere they like suffering from sth or wat!! :O

may be they assigned some pathan to make the time table

 

[snowbrood]

Yeah i'd say

and they gaved
more than 20 days for practicals and mcqs lol at them freakin stupids