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4 : u need to estimate like if u take 1 division for 0.5 u'll get 35.5 so i'll be Bhi,
i have a couple of questions in oct/nov 1998
Q.4
Q.21
Q.11
tyvm and plz help
http://www.freeexampapers.com/past_papers.php?l=Past_Papers/IGCSE/Chemistry/CIE/1993-2003/ here is the link again
11 : It will be A ,as it has 4 hydrgen in one carbon so 4 water molecules
if u c B it has 2 carbon with 6 hydrgen so 6 water molecule but if u take 2 of the structures of A u will get 8 H which is 8H2O
21: i think it will be C but em not sure