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AQA CHEM4 A2 Chemistry - 9 June 2014 Unofficial mark scheme

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darthvader2013

Original post by darthvader2013

Aw!

most people will have, to be honest, it was a tough question!

Is it me or is this paper harder than past years'?
I'm just hoping the grade boundary will be lower this year :frown:

Reply 41

Vitacoco123

There was a question where you had to join lysine and alanine to form the dipeptide.
There was also a question to which the answer was 2,6-diaminohexanoic acid.

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Reply 42

A sheesh

[QUOTE="darthvader2013;48069137"]

Original post by darthvader2013

Aw!

most people will have, to be honest, it was a tough question!

Is it me or is this paper harder than past years'?
I'm just hoping the grade boundary will be lower this year :frown:

I wouldnt say its got much much harder but more the fact the questions are more obscure. Also since they have asked new questions this yr i generally feel the boundaries will drop.

86-A* 77-A 70-B 61-C

Reply 43

darthvader2013

[QUOTE="sheesh;48069222" A="A"]

Original post by darthvader2013

To get an A* in chem , do I just need 540 UMS in total or do I need 270 UMS in my A2 modules ?

Reply 44

ai96

For the ppm one where you had to write the ppm eg 20-50 I only wrote the first number instead of the range. Will I get a mark still?

Reply 45

blissfully

Original post by ai96

For the ppm one where you had to write the ppm eg 20-50 I only wrote the first number instead of the range. Will I get a mark still?

yeah definitely, the question said suggest a value so it's fine as long as it is in the range, alternatively stating the range has been ok in past papers too as opposed to the value

Reply 46

blissfully

[QUOTE="darthvader2013;48069399"]

Original post by A sheesh

To get an A* in chem , do I just need 540 UMS in total or do I need 270 UMS in my A2 modules ?

from my understanding it is 270 in A2 and 480(80%)+ overall

Reply 47

darthvader2013

[QUOTE="blissfully;48069556"]

Original post by darthvader2013

from my understanding it is 270 in A2 and 480(80%)+ overall

Guess I might have to get an A* from sth else then.......
Anyways, thank you :smile:

Reply 48

BayHarborButcher

Did the very ;ast bit have to be cyclic?? :L I put a diketone :/

Reply 49

pureandmodest

i'm scared about results day :c
what do you think the grade boundaries will be like?
lower than last year or higher?

Reply 50

TheAlchemistt

Does it matter where you put the groups on optical isomerism?

Reply 51

chzm

'quaternary ammonium (bromide) salt, nucl sub with CH3Br in excess (4)
use tollens, nothing with J, K silver mirror, J has 2 peaks K has 4 (5)'

whats this about peaks? did we have to deduce peaks in J and K? i dont remember doing that D:

Reply 52

JackTheNerd

For the electrophillic substitution, was it from benzene or chlorobenzene. How many lost marks for drawing it from benzene instead of chlorobenzene if it was?

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Reply 53

lolololol18

I don't remember writing down the test for silver mirror.. was it the answer for the test for J and K? I think I wrote sodium carbonate instead

Reply 54

Vitacoco123

Original post by JackTheNerd

For the electrophillic substitution, was it from benzene or chlorobenzene. How many lost marks for drawing it from benzene instead of chlorobenzene if it was?

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Only one I think

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