Chemistry Paper 61

[ali khan saaed]

Melting point. not boiling people.

Chromatography MAY be right.

shut up..

 

[MTH]

i wrote exothermic... they both r same!! its ryt

What if I wrote temp decrease ???

 

[ali khan saaed]

its effervescence and turns limewater milky

fizz

 

[ali khan saaed]

its 60 marks

46

 

[svenas]

hii! my xams were gud, alhamdulillah! but i kinda did blunders.

plz here I need ur help urgently for this question physics p3 http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w11_qp_33.pdf q8 part c
I cant understand it at all so plz help me out

THANKS..

 

[bluefa1con]

46

lol dude check any threshold p6 is always for 60 marks
and it was mentioned on 1st page that max marks are 60

 

[shalala]

Was the second graph like this???

^^^^^Could you answer my question pleasee??

lol dude check any threshold p6 is always for 60 marks
and it was mentioned on 1st page that max marks are 60

 

[Ahmed GolD]

plz here I need ur help urgently for this question physics p3 http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w11_qp_33.pdf q8 part c
I cant understand it at all so plz help me out

THANKS..

Remember lenz's law about induction that a current is produced to oppose the movement of the coil. So here when motor speeds up more current gets out of the battery to oppose this movement and so current from battery falls.

 

[L-Girl]

do you think the grade thresholds for chem paper 6 will be low?

 

[Hadil]

Anyone done with Chemistry paper 6 invar. 2 . All of you guys are doing 1 . 0.0

 

[Jisu]

lol all potassium salts and soluble
all nitrates are soluble
so there wont be any precipitation so the change will be that there will be no solid

for the graphs 1 answer was 14 and the other was 43 i think

i wrote reaction will be slow..
do u think its rite??

 

[Jisu]

LOL!!

whohahaha

 

[Jisu]

How about the table of results/observations ? what was the conclusion ? I didnt understand what was the gas that formed a white solid on top and turned litmus paper blue ?

I wrote ammonium carbonate btw ...but the question is for 2 marks ...i doubt tht this answer will get both marks !

ikr!
i wrote ammonium carbonate
n ithink its rite cuz its just one compound "W" unlike in other pst pprs u hav like 2 or 3 compounds
also i cant remeber but was there any test for other ions??

 

[Jisu]

I dun remember but i think i wrote about iron sulfate crystals forming :\ because it was a liquid solution right ???

correct

 

[Jisu]

WTF!

watch wat ya say!
read this, its from wikipedia
i dont think u hafta kno it in sch a detail
i think da crystallization thingy majing is rite
"On heating, iron(II) sulfate first loses its water of crystallization and the original green crystals are converted into a dirty-yellow anhydrous solid. When further heated, the anhydrous material releases sulfur dioxide and white fumes of sulfur trioxide, leaving a reddish-brown iron(III) oxide."

Its says WEN FURTHER HEATED....

 

[Jisu]

Im not doin a lot of revision for physics coz I think Im better at it than I am in chemistry....any revision sheets, formula sheets and other key points etc would be greatly appreciated thx

lucky ass

 

[EpicLol]

In physics 2005 Paper 3 summer, I need help on q 1....I thought it would like be a curve but in the other way like in the picture because as it falls it accelerates....but I am not sure why it does what it does....prbly because of air resistance, the acceleration slowly decraeases as speed increases....any links help on this would be appreciated

 

[sma786]

It was thhe questiion where you heated(a lot) iron(II)sulphate
It would form Iron-oxide, SO2, SO3 if it said just heat then it would dehydrate but it said heat for a long time.....so it would decompose into these 3 things...

:\ i wrote it wud form crystals .. because it would reach its crystallisation point

 

[EpicLol]

:\ i wrote it wud form crystals .. because it would reach its crystallisation point

I dont think that would be acceptd

 

[EpicLol]

can someone like quiz me on like physics questions? or you doubts for paper 3 tomorrow
Thanks a lot!