GT for Chemistry paper 22 AS.

[TahaJamshed]

Yes -129

mine came positive 129 this was the only part in whole paper i got wrong :\ will ecf be given in the next part ?

 

[JD REBORN]

Catalyst one will be right the other temp and pressure one will be wrong

Justify how can the temperature and pressure one be wrong?

 

[egy]

Justify how can the temperature and pressure one be wrong?

what is ur answer ?????????????


going to cry

 

[00tanveer]

 

[JD REBORN]

what is ur answer ?????????????


going to cry

The rate of formation of methanol would increase in each of the three cases

 

[Shoaib idiot boy]

Justify how can the temperature and pressure one be wrong?

What did u write for it if u used the kinetic theory then it's right else it's wrong coz it's not an equilibrium condition as no reversible reaction was occuring

 

[angelicsuccubus]

.

Paper was comparatively easy from the past few years.
Organic questions were very well designed and most of the candidates including me lost marks in the organic questions.
A lot of people did very well while a lot of people messed it up too

Grade threshold
46 - 48 - A (Most probably)

I actually liked the organic questions over the inorganic ones... wasn't sure about any of the chloride shizz

 

[JD REBORN]

What did u write for it if u used the kinetic theory then it's right else it's wrong coz it's not an equilibrium condition as no reversible reaction was occuring

Equilibrium had absolutely no relation with the question,it was simple O level concepts.In each of the three cases the rate of formation of methanol would oncrase because at higher temperatures rate of reaction increases,at higher pressure molecules collide more oftenly so rate of reaction increases and similarly for catalyst...

 

[00tanveer]

Effect of high pressure: The spacing of the molecules decreases. Therefore, frequency of collisions increases which leads to an increase in the rate of formation of methanol.
Effect of high temperature: This is increases the average kinetic energy of the molecules. So, proportion of molecules exceeding activation energy increases. This leads to an increase in the rate of formation of methanol.
Effect of a catalyst: This reduces the activation energy of the reaction. So, frequency of effective collisions increases leading to an increase in the rate of formation of methanol. That's about it guys. Hope it matched with you.

 

[JD REBORN]

Effect of high pressure: The spacing of the molecules decreases. Therefore, frequency of collisions increases which leads to an increase in the rate of formation of methanol.
Effect of high temperature: This is increases the average kinetic energy of the molecules. So, proportion of molecules exceeding activation energy increases. This leads to an increase in the rate of formation of methanol.
Effect of a catalyst: This reduces the activation energy of the reaction. So, frequency of effective collisions increases leading to an increase in the rate of formation of methanol. That's about it guys. Hope it matched with you.

spot on

 

[00tanveer]

My GT prediction: 48 I obviously want it to go lower but it seemed this paper was relatively easy. Would do good if nothing goes too wrong. I'm sure everybody here can get an A too, InshAllah.

 

[AdeelRox]

guys i have done a mistake by making the whole displayed formula i.e
...C-C-C.. in that organic question instead of
...CH3CH2CH2..
will i get marks for it. please please pleaseeee tell me

 

[00tanveer]

Not sure dude. I've seen nothing in mark schemes related to not showing structural formula (showing displayed formula instead) in past papers. Just keep your hopes up though! The boxes are always LARGE indicating that they might accept displayed formulae!!!

 

[AdeelRox]

the problem is that i draw whole structures in every part evn in q.5 i dunt know whether we had to draw them or chow just the structural formula.
though all the structures were correct t i made the whole structures labelling every bond. in q.5 did u draw the whole structue. the last 1 was triol when we oxidised cmpound G, did u draw whole structure?

 

[Duamask]

THis is Chemistry VARIANT 2 Discussion RIGHT? :O

 

[TahaJamshed]

THis is Chemistry VARIANT 2 Discussion RIGHT? :O

its mixed up 22 variant had 4 questions and apparently 21 had 5

 

[terry jefferson]

Equilibrium had absolutely no relation with the question,it was simple O level concepts.In each of the three cases the rate of formation of methanol would oncrase because at higher temperatures rate of reaction increases,at higher pressure molecules collide more oftenly so rate of reaction increases and similarly for catalyst...

Dude the rate of formation of methanol wouldnt increase coz the reaction was methanol combusting to give CO2 and H2O and energy.....So the rate of combustion of methanol would increase.......

 

[terry jefferson]

Effect of high pressure: The spacing of the molecules decreases. Therefore, frequency of collisions increases which leads to an increase in the rate of formation of methanol.
Effect of high temperature: This is increases the average kinetic energy of the molecules. So, proportion of molecules exceeding activation energy increases. This leads to an increase in the rate of formation of methanol.
Effect of a catalyst: This reduces the activation energy of the reaction. So, frequency of effective collisions increases leading to an increase in the rate of formation of methanol. That's about it guys. Hope it matched with you.

Dude the rate of formation of methanol wouldnt increase coz the reaction was methanol combusting to give CO2 and H2O and energy.....So the rate of combustion of methanol would increase.......​

 

[TahaJamshed]

Dude the rate of formation of methanol wouldnt increase coz the reaction was methanol combusting to give CO2 and H2O and energy.....So the rate of combustion of methanol would increase.......​

you are confusing part a with this part the equation was CO and 2 H2 give methanol

 

[saurabh]

ya i wrote sodium...guys what if i have wriiten the scrutural formula with pencil will they deduce marks?