Qualification > Queries

Chem 12

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IGCSE nightmare:
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 :)

leebux101:
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

IGCSE nightmare:
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

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