CHEM P42 GT and paper discussion

[Mayedah]

for all those voting for 75+ (16 OMG) that threshold if reached by CIE will be a MIRACLE and first time in chem in the LAST DECADE or so so please refrain from scaring the life out of those who didnt do well .
daredevil asd syed1995 add ur votes

True the threshold wont go above 68 surely. Never has !

 

[syed1995]

for all those voting for 75+ (16 OMG) that threshold if reached by CIE will be a MIRACLE and first time in chem in the LAST DECADE or so so please refrain from scaring the life out of those who didnt do well .
daredevil asd syed1995 add ur votes

70-73 Maximum threshold imo.. Iss sy ziyada nai jaayega.. probably gonna be high 60s.

 

[DeathGamblR]

sadly i screwed on the pH wala question

 

[kruti]

How much do you expect?

 

[talha196]

What dis you guys for why monomers in plant dont form addition polymerisation.

 

[kruti]

Is it because they are not all saturated compounds?

 

[talha196]

Is it because they are not all saturated compounds?

I wrote same. So frnds wrote because of unfavourable conditions
Which one is correct.

 

[kruti]

I think it's because of the absence of unsaturated compounds.

 

[talha196]

I think it's because of the absence of unsaturated compounds.

Lets see what others say. I am still unsure about the saturation thing coz addition polymerisation need high end conditions which arent available to plants( like high pressure)

 

[kruti]

Lets see what others say. I am still unsure about the saturation thing coz addition polymerisation need high end conditions which arent available to plants( like high pressure)

Yeah. You might be right.

 

[Waleed Amjad]

Is it because they are not all saturated compounds?

They don't have double bonds and have more than one functional group so condensation reactions occur. Not addition.

 

[saadgujjar]

They don't have double bonds and have more than one functional group so condensation reactions occur. Not addition.

we have to right that they have no double bonds

 

[kruti]

They don't have double bonds and have more than one functional group so condensation reactions occur. Not addition.

pheww Thanks. That's what I wrote.

 

[zaidwaseem]

chlorine's atomisation energy wasnt given. :/

 

[kruti]

chlorine's atomisation energy wasnt given. :/

we were supposed to use the bond energy, I think.

 

[asenfire]

how much mark did this question have, the lattice enthalpy one

 

[I don't care]

chlorine's atomisation energy wasnt given. :/

Chlorine is already a gas so no need of the atomisation energy

 

[saadgujjar]

Chlorine is already a gas so no need of the atomisation energy

we have to use 242 for chlorine....bond energy should be used....if u have coursebook,check its written in first page of lattice energy

 

[hope4thebest]

Chlorine is already a gas so no need of the atomisation energy

Atomisation means atoms in gaseous state so you had to convert the Cl2 molecule in 2 Cl atoms by using bond energy of Cl2

 

[hope4thebest]

People here is what I think about GT
Oct Nov 13-variant 43 which was many times difficult paper than M/J 14 (42) its GT was quite high on 68. By this standards this time it must be around in the 70's probably low 70's.
Agreed AbbbbY Farez itallion stallion ?