Chemistry Paper 61

[Lujain M.]

dude it was Kcl + AgNo3 will give Agcl wish is an insoluble saltt !!!

 

[thats_me]

i was so xctided i got 10 alerts....
i was on the 4th page...reading how ppl were whacking their wits out....and i realized i have 17 more pages to read....and that ppl are still commenting....replying...blah blah
n thn i was like ***********************************************
also someone actually replied to one of the first post...in the last pg!!
-_________- are u kiddin me???!

PEOPLE go study for physics or business....ths p6 is 20% only

LOL!!

 

[Srhmnir]

i just knew the answer for the copper test tube thing !
in fact copper is aconducter of heat so it conducts heat fast so heat will be conducted to the water faster but once the heat is stopped the water will lose heat fast as well
and as the final temp is measured directly after the flame is extinguished so the answer will be that the difrrence increases not decreases
hope you guys understood !
and btw i did it wrong !

 

[Beedo]

I said the copper absorbs heat so there won,t be much change in the temperature and results would be inaccurate
is that right?

 

[Lujain M.]

I said the copper absorbs heat so there won,t be much change in the temperature and results would be inaccurate
is that right?

I wrote the same thing

 

[nehaloo]

me too I wrote the same thing!

 

[mohammed yasser]

It's Desplacment, How did you know it's EXO?

nawaf ana mohammed yasser can we say it is redox

 

[mohammed yasser]

please what about the first question that says how the student know that all acid had reached can we say change in colour take place

 

[mohammed yasser]

I put displacement and I think displacement, precipitation, and exothermic are right....but Im not sure if its displacement or double displacement....

what about redox

 

[Micro961]

please what about the first question that says how the student know that all acid had reacted can we say change in colour take place

1- No more fizzing.
2- some solid appear at the bottom of the beaker.

 

[mohammed yasser]

1- No more fizzing.
2- some solid appear at the bottom of the beaker.

we cant say colour changes

 

[Beedo]

1- No more fizzing.
2- some solid appear at the bottom of the beaker.

can I write no more evolve of gas instead of fizzing

 

[Micro961]

we cant say colour changes

can I write no more evolve of gas instead of fizzing

I don't know guys.. I'm not an expert! but there should be more than 1 answer so don't worry.. it doesn't mean ur wrong!

 

[EpicLol]

i dun remember the question :$ elaborate plzz

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...

 

[bluefa1con]

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...

the question asked about when they boil the solution
water evaporate
solution is concentrated
at point of crystallisation crystals formed
they didnt say anything about boiling to dryness so i dont think anhydrous would be appropriate here

 

[*MK*skydiver :D]

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 !

 

[IGCSE O/L student]

hiiiiii......how was ur exam today?

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

 

[IGCSE O/L student]

hi5 then

hiiiiiiifiiiiveee!

 

[shalala]

ALRIGHT THEN
I just called a friend
It was IODIDE
But even then, silver iodide and lead iodide are broth bright yellow
Whatever imma go study physics, no need to dwell on whats over

i wrote burette aswell

thnk u. dats really swt of u!

the second graph was easy, i dun understand y people are facing problem?
You just had to make a line from 1-6 (24cm cube) and then 1 smallll line from 6-7 .. thats it

ok gd luck for your next exams then and btw do u do business?

Was the second graph like this???

 

[IGCSE O/L student]

Was the second graph like this???

myn wsnt lyk dat. i think urs is ryt!