IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => GCE AS & A2 Level => Queries => Topic started by: IGCSE nightmare on June 10, 2010, 09:31:32 am

Title: Chem 12
Post by: IGCSE nightmare on June 10, 2010, 09:31:32 am

How did you think it was?
I thought we needed some more time, because some questions were difficult :-\

Title: Re: Chem 12
Post by: elemis on June 10, 2010, 09:36:57 am

NO DISCUSSIONS OF EXAM DETAILS UNTIL 24 HOURS HAVE PASSED !!!

Title: Re: Chem 12
Post by: moon on June 10, 2010, 06:48:32 pm

ya, that's true :-\

Title: Re: Chem 12
Post by: IGCSE nightmare on June 11, 2010, 10:28:30 am

24 Hours are over, can we discuss now?

Title: Re: Chem 12
Post by: nid404 on June 11, 2010, 10:35:25 am

yes you can

Title: Re: Chem 12
Post by: IGCSE nightmare on June 11, 2010, 02:43:55 pm

What was the answer for the enthalpy change question, question 5 and the last one, the reflux?
And SO2 being used as a food preservative and the radicals that can form?
And the hyroxide  concentration in nucleophilic substituition ....?
And is Ammonia with a haloalkane a nucleophilic substituition?
And that's it :-D
LOL
Thanks in advance :)

Title: Re: Chem 12
Post by: leebux101 on June 11, 2010, 03:21:14 pm

i did as follows :
enthalpy change - c
last question - b
for so2 , i think there were two options - probably b
dont noe abt radicals
yes ammonia woth haloalkane is nucleophillic substitution

PS - i gave p-11

Title: Re: Chem 12
Post by: IGCSE nightmare on June 14, 2010, 07:23:23 am

Anyone got any different answers?
I want to enjoy my Summer with a good start  :'(
I got none of these correct except for the last one