chemistry

[ruby92]

o/N 2002  paper 1
 Q 11, 24,26

also anyone have any worksheets etc with a summary of all organic chem reactions??

[ruby92]

U mean paper 1, it is simple. It doesn't matter if it is a new compund dat u haven't studied all what u need to do is to count da number of oxygen atoms u will find them four, carbon atoms nd they r also four nd the hydrogen atoms nd they are also 4. hence the molecular formula is C4H4O4. It's B. U don't need to simplify since the question is about the molecular formula.

which answer is this?

[ruby92]

i think u did the wrong paper...
ive attached the papers here

[nid404]

hmm....
Q11..try n understand....total no of moles=4
partial pressures= no.of moles/ total no of moles X pressure
so the no of moles of products=x each
pp of h2= x/4 X p
pp of I2= x/4 X p
pp of HI= (b-x)²/4 X p²

Kp= x² p²/16
      (b-x)²/4 X p²
     = x_²__
       4(b – x)2
     

[nid404]

Q 24
B

Because only primary n secondary alcohols can be oxidised.
so C n D r out
Not A because it's primary and should form carboxylic acid on further oxidation but this one doesn't, so B

[nid404]

Q 26...
U have to c which one of them form diols whose groups are secondary....secondary diols will form diketones on oxidation

[ruby92]

oct/nov 2003 paper 2
Q:3 specifically; b(ii) (iii), C(ii) and d

[nid404]

oct/nov 2003 paper 2
Q:3 specifically; b(ii) (iii), C(ii) and d

In a while

[3ishakay]

oct/nov 2003 paper 2
Q:3 specifically; b(ii) (iii), C(ii) and d

yo 3)b)i)

is


mc(chnage in temp.)

so its

200 x 4.2  x  12.2   =   10.2 kJ

[nid404]

u jst told me u didn't study mmuch 

[3ishakay]

u jst told me u didn't study mmuch 

lol trust me .. i jus got bak frma 4 month vacation ..

this stuff ws in IGz ..

[Saladin]

lol trust me .. i jus got bak frma 4 month vacation ..

this stuff ws in IGz ..

ya it was actually.

[ruby92]

oct/nov 2003 paper 2
Q:3 specifically; b(ii) (iii), C(ii) and d

also m/j 2002 Q5 a(iii) iv and v

[nid404]

I don't have the paper...can u plz upload it

[ruby92]

here u go
its m/j 2002 paper 2 By the way