- Messages
- 242
- Reaction score
- 99
- Points
- 53
a reasonable expected GT:
P1 : 32=A, 28=B
P2: 46/47=A, 40=B
P33: 26/27=A, 23=B
P1 : 32=A, 28=B
P2: 46/47=A, 40=B
P33: 26/27=A, 23=B
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Actually, my original comment started off as -Dat reaction ws not an equilibrium one
yeah ! my friend once got E in his practical A in both the papers and he also got A35 in P12, 53 in P22 and 16 in P33.........Will these marks in chemistry fetch me an A in AS?
There is a possibility of getting an A. Almost everyone i know gave really crappy practicals. Ur paper 1 and 2 marks are all right they will be more than the GT. So yea you can get an A. But it wont be a high AIf you've given the paper this year you'd know the expected thresholds. What do you think would become of these marks?
but the reaction (of methanol forming from CO n H2) is reversible in most of the sites!!Normal conditions are room temperature (around 25degrees) and 1 atomsphere or pressure. The conditions quoted were both higher, way high. So yeah, the rate of formation of methanol would increase in all cases. And for the UPTEENTH TIME, the second reaction was NOT a reversible reaction!!!!! (this is for those who adamantly keep sayin it's an equilibrium).
Even if it was reversible in real life ! in our paper it was not given reversible that means you cannot apply equilibrium the question clearly in bold letters asked for effect on RATE OF FORMATION OF Methanol which is increased by increasing all of the given conditions : temperature, pressure and catalystbut the reaction (of methanol forming from CO n H2) is reversible in most of the sites!!
This should be it. Nothing more!! GOD HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!a reasonable expected GT:
P1 : 32=A, 28=B
P2: 46/47=A, 40=B
P33: 26/27=A, 23=B
yeah i knw dat.. but in the sites its also given that the operating temp of the rxn is 250c n in exam it was 373c, so incresing temp increases rate is correct i guess!!! although the head of our centre's chem dept. said its a low temp n rate will be less like the habers process!! so im makin surrEven if it was reversible in real life ! in our paper it was not given reversible that means you cannot apply equilibrium the question clearly in bold letters asked for effect on RATE OF FORMATION OF Methanol which is increased by increasing all of the given conditions : temperature, pressure and catalyst
its not released yet by CIE!! most proably by sept. u might get it but its too longDo any of you have a markscheme for p12? I really wanna check my answers.. cause practical sucked and p1 Im not sure
yeah the increase pressure and temperature reduce yield not the rate of reaction(it is always increased) due to more successful collisionsyeah i knw dat.. but in the sites its also given that the operating temp of the rxn is 250c n in exam it was 373c, so incresing temp increases rate is correct i guess!!! although the head of our centre's chem dept. said its a low temp n rate will be less like the habers process!! so im makin surr
lol no I meant, may be someone wrote down the answers after the exam cause I know people tend to take the papers from their centres and re do them .. sighits not released yet by CIE!! most proably by sept. u might get it but its too long
it wasn't a flame test, it was, a chloride of which element from period 3 burns with a coloured flame?guyz check this http://en.wikipedia.org/wiki/Flame_test
it says phosphorous has a blue-green flame, does that count? what if i didnt write sodium and wrote P instead
but their answers cud also be wrong!!lol no I meant, may be someone wrote down the answers after the exam cause I know people tend to take the papers from their centres and re do them .. sigh
damn.. thnx nbtw, do you know aboutany of the other doubts ive highlighted?
thnx again
yeh true, but it's like a crazy curiousity to compare and find satisfaction, right?but their answers cud also be wrong!!
dude actually it was q.4. i said it wrong it was q.4 of paper 22 in whch i drew the whole structures of all the organic compounds in the boxes.
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