paper 12 chemistry ...

[Ali Shujaat]

it was b. dat equilibrium one.

 

[BILALrox01]

for the (2+x/2) most of the people did D :/
I feel D is correct now :/

D is correct

 

[Henry930821]

Can anyone tell me what was the question about the ester? Mass of the products after hydrolysis or mass of the reactants in the ester?

mass of products...

 

[Ash1994]

hey wb tht ....halogeno alkane chnging into carboxylic acid....isnt it A or C?

C! KCN in ethanol I THINK SO!

 

[Henry930821]

D is correct

yeah confirmed it d....

 

[Ali23]

@henry..yea i did A

 

[Ali23]

its D for incomplete no. of shells

 

[BILALrox01]

mass of products...

after hydrolysis right? then it was 50 50

 

[Ali Shujaat]

A.. nucleophilic substitutition with NaOH then oxidation by Cr2o7/h+ since number of carbon didnt change

it said in two steps. this becomes 3. first to aldehydes than to acid. and u need further heating for that. i think it was that kcn one.

 

[Henry930821]

its D for incomplete no. of shells

isnt this methane free radical?

 

[thunderingthunder]

Nooo....On addition of KCN the no.of carbons would have increased...The no of Carbons was the same

 

[Henry930821]

it said in two steps. this becomes 3. first to aldehydes than to acid. and u need further heating for that. i think it was that kcn one.

nope this is only 2 steps. nucleophilic substituition then oxidation during heating

 

[Ali23]

wb dat 30th question....there are 2 thngs they told..i remeber 1 thng i.e it cant react with PCl3.....it go 4 ethyl ethanoate... D...m i ryt??

 

[Henry930821]

Nooo....On addition of KCN the no.of carbons would have increased...The no Carbons was the same

this is right

 

[Prince III]

isnt this methane free radical?

yes It Was B

 

[Henry930821]

wb dat 30th question....there are 2 thngs they told..i remeber 1 thng i.e it cant react with PCl3.....it go 4 ethyl ethanoate... D...m i ryt??

yeap u r

 

[BILALrox01]

it said in two steps. this becomes 3. first to aldehydes than to acid. and u need further heating for that. i think it was that kcn one.

it becomes aldehyde only if u distill it. it was A. number of carbons didnt change

 

[Prince III]

wb dat 30th question....there are 2 thngs they told..i remeber 1 thng i.e it cant react with PCl3.....it go 4 ethyl ethanoate... D...m i ryt??

Yes D

 

[thunderingthunder]

this is right

So it WASN'T KCN right??

 

[Prince III]

its D for incomplete no. of shells

Ali that Was B Bro