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Higher Chemistry 2010 Answers Thread -

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Reply 20
tv1992
waitt is polyethenol not insoluble??

it is soluble.
Hayleyyr
Im not sure about this exam... some things seemed over simple other stuff I just didnt have a clue lol.
My multiple choices answers were
BCABB ACBAD BBABD CDAAB CCACC DDCBD BADCB CBDDA
BCCBB DCBAD BABDD CAAAB CDACA DDCDD BABCB CBDAA


I have 11 different from you :frown:
Reply 22
tv1992
waitt is polyethenol not insoluble??



Nope its soluble
Reply 23
tv1992
waitt is polyethenol not insoluble??


Noo.. it can H bond with water?
AyuuBB
Noo.. it can H bond with water?

nope, there are no o-h, n-h, f-h bonds within the polymer
Reply 25
craaap i thought that aswell since it is said an unusal property, a plastic being insoluble isnt very unusal :P
whats the poly something compound thats insoluble then haha, its usually a multiple choice qu n when its options i always get it lol, just not written down :P ahh well lol
Reply 26
tv1992
craaap i thought that aswell since it is said an unusal property, a plastic being insoluble isnt very unusal :P
whats the poly something compound thats insoluble then haha, its usually a multiple choice qu n when its options i always get it lol, just not written down :P ahh well lol


Nearly all of the other poly- are insoluble I think.
Reply 27
MC question 40- answer is definitely A and MC question 1 answer is ammonia i think cant remember what letter that is though... thought it was ok, think the grade boundaries will stay pretty much the same!
red_roses123
heres my multiple choice answers...whoever has theres put them up and then we can figure out the answers through power of deduction.

BCCBD BCBAD BABDD ACAAB ACACA DDCDD BABCB CACDA
BCCBB DCBAD BABDD CAAAB CDACA DDCDD BABCB CBDAA

I have 9 different from you. Not too bad
Reply 29
Lizzay29
MC question 40- answer is definitely A and MC question 1 answer is ammonia i think cant remember what letter that is though... thought it was ok, think the grade boundaries will stay pretty much the same!


Yeah, 1 is B
Reply 30
Did anybody get cyclohexane as one of their answers?
bronwyn93
Did anybody get cyclohexane as one of their answers?

:yes:
Reply 32
bronwyn93
Did anybody get cyclohexane as one of their answers?


Yupp, non-aromatic and does not decolourise bromine solution. =)
Reply 33
what about the % yield? i got 60 something :-S
Did anyone get that 0.0003125 moles of oxygen is dissolved in the (ocean) water sample?

And o.02 moles for the unreacted thingy question?
Reply 35
afshooneh
what about the % yield? i got 60 something :-S

I got 68% :smile:
Reply 36
garlicbreadman
Did anyone get that 0.0003125 moles of oxygen is dissolved in the (ocean) water sample?

Yeah
Reply 37
afshooneh
what about the % yield? i got 60 something :-S

Yeah, I got 67.5%. I got the theoretical yield to be 64.0
what was ur answers to the first one? about the bonding in lithium and boron and nitrogen?
justasmalltowngirl
what was ur answers to the first one? about the bonding in lithium and boron and nitrogen?

Lithium - metallic bonding - lattice
Boron - covalent - network
nitrogen - covalent- molecular

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