[kishenp]

(Original post by ManPowa)
If Anyone wants all the JAN 12 papers for biology and chemistry OCR A and B, heres the link:

http://www.thestudentroom.co.uk/show....php?t=1943168

Hi there
clicked on your link but it didnt allow me access
would you be able to upload pdf or direct links to the papers and mark schemes
For A2 chemistry B and Biology units:
-F334
- F335
- F214
- F215
Thanks so much
For the Jan 2012 papers
Thanks again

[ashleighlg]

If anybody would like to revise over MSN, private message me

[Princess Kawaii]

can anyone explain the answer to question 2 e(i) in the June 10 paper f334??
Thankkss

[kishenp]

i have quite a problem naming compounds at times
is there any tip that anyone has on this ?
thanks

[csefton3]

(Original post by kishenp)
Is this who i think it is!!!!
Isnt my main boy is it !!!!

Hi my name is dopey dimmock

[csefton3]

(Original post by kishenp)
i have quite a problem naming compounds at times
is there any tip that anyone has on this ?
thanks

I reckon hardest one to name is esters. But its easy when you know how: name the alcohol part first and the acid part second. The "alcohol part" is bonded to the O and the acid is bonded to the C=O. Example, methyl propanoate, "methyl" from O-CH3 and "propanoate" from CH3CH2C=O.

Hope you understand that cause i just read it back and i dont.

[ManPowa]

(Original post by kishenp)
Hi there
clicked on your link but it didnt allow me access
would you be able to upload pdf or direct links to the papers and mark schemes
For A2 chemistry B and Biology units:
-F334
- F335
- F214
- F215
Thanks so much
For the Jan 2012 papers
Thanks again

if you type them into google with the code and year you should be able to get them. if not let me know.

[Inactivity]

(Original post by csefton3)
"How does recystallisation remove insoluble and soluble impurities?"

SAY WHAT.

(Original post by kishenp)
Is this who i think it is!!!!
Isnt my main boy is it !!!!

School reunion (c dot evans)

[Waki]

hate steel story its so confusing!

does anyone have any notes/condensed notes to look at?

[-James-]

anyone have a list of all the reactions we need to know like making say aldehyde from primary alcohol oxidation? would really really appreciate it

[navarre]

(Original post by -James-)
anyone have a list of all the reactions we need to know like making say aldehyde from primary alcohol oxidation? would really really appreciate it

Alkene--- Alkane, H₂, Ni catalyst, 150oC, high pressure
Alkene----bromoalkane, HBr, 20^oC
Alkene------ polyalkene, free radical polymerisation
Alkene----- dibromoalkane, Br₂, 20^oC
Alkene----- Alcohol, Steam, 300^oC, H₃PO₄ catalyst
Alcohol---- alkene, Al₂O₃ at 400^oC
Alcohol---- chloroalkane, shake with conc. HCl at room temp (tertiary alcohols only)
Chloroalkane----- alcohol, reflux with aqueous NaOH
Chloroalkane---- amine, reflux with excess NH₃ in ethanol solvent

The alcohols one you need to know but they're easy.

[ManPowa]

(Original post by -James-)
anyone have a list of all the reactions we need to know like making say aldehyde from primary alcohol oxidation? would really really appreciate it

I have this, Not sure how useful it shall be.

[Hanz_a93]

(Original post by navarre)
Alkene--- Alkane, H₂, Ni catalyst, 150oC, high pressure
Alkene----bromoalkane, HBr, 20^oC
Alkene------ polyalkene, free radical polymerisation
Alkene----- dibromoalkane, Br₂, 20^oC
Alkene----- Alcohol, Steam, 300^oC, H₃PO₄ catalyst
Alcohol---- alkene, Al₂O₃ at 400^oC
Alcohol---- chloroalkane, shake with conc. HCl at room temp (tertiary alcohols only)
Chloroalkane----- alcohol, reflux with aqueous NaOH
Chloroalkane---- amine, reflux with excess NH₃ in ethanol solvent

The alcohols one you need to know but they're easy.

Are they all of them that you have to know? (apart from alcohols) dats all right??

[navarre]

(Original post by Hanz_a93)
Are they all of them that you have to know? (apart from alcohols) dats all right??

For F334, yep. We have to learn more for F335 though.

[itsbooma]

Hello.

has anyone got a different link for the Jan 2012 paper? as the 'mediafire.com' one, isn't loading for me at all!

thanks

[ManPowa]

(Original post by itsbooma)
Hello.

has anyone got a different link for the Jan 2012 paper? as the 'mediafire.com' one, isn't loading for me at all!

thanks

here u go

[itsbooma]

(Original post by ManPowa)
here u go

Thanks so much! Have you got the f335 Jan 12 as well?

If not, no worries.

Thanks again

[Hanz_a93]

When hydrolysing polymers with ester links, how should you know when to use concentrated sulfric acid or aqeous acid ? Some mark schemes sometimes want one of the 2 only

[ManPowa]

(Original post by itsbooma)
Thanks so much! Have you got the f335 Jan 12 as well?

If not, no worries.

Thanks again

http://www.thestudentroom.co.uk/show...890&p=37931943

[vishalb]

has anyone got any predictions on what could come up?
I haven't seen any biology questions (DNA, transcription translation) questions for a while?