CHEM PAPER-22

[wasiqss]

Hey guyz its was CuO coz ,in c part it was said that X can be made From broken crockery,Pumice,clearly means Copper is Present in X,so steam is produced in dehydration,which OXidises Cu to Cu(II)O.

 

[obr***]

ohki i wuz searching the net for it nd i found this ...

http://www.google.com/imgres?imgurl=htt ... s%3Disch:1

and
[url=http://www.wissensdrang.com/media/oc26.gif]http://www.wissensdrang.com/media/oc26.gif
[/url]
nw wt do u havvta say?? =D

it can b SiO2 as well
cux i saw ds in a book of O lvlx and dre itx written dat it can b alimunia (Al2O3) OR Silica (SiO2)

 

[liang3404814]

it should be Al2O3 or SiO2, check out w09_qp11, q39

 

[ashhadazam]

Lol so much controversy on this question !! Leave it to the examiners now ! Prepare for P1

 

[sweety]

DAMNN!!

made so stupid mistakex....so much WORRIED...
..it wax da easiest paper but made so stupid mistakex...
almst 13 14 markx on stake.....n da remainin dun knw....
jux wish da percentile getx really low...!!!!!!!

 

[Illuminati]

it was easy this time

 

[Illuminati]

what about copper?it turns blac when its oxide is formed .

 

[angel101]

IT WAS CARBON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :evil:

 

[Shafaque]

i made silly mistakes too =(

 

[sweety]

paper wax v easy...
per dun knw where wax my mind while attemptin paper..made hell stupid mistakex...

n in mst ov da placex itx written aluminium oxide for dat black solid...i even wrote dis wrong.. !

 

[Ab.R0xi0uS]

soo what can be the gt for this ppr ?

im guessing 42-43 :|

 

[Ab.R0xi0uS]

make that 45 i guesss for an A