How was Chemistry 42?

[Jinkglex]

h2s04 and hno4 both conc. heat to 55 for alkylbenzene
hno3 dilute RTP for phenol

 

[abdulmoizmehmood]

how do i check the grade thresthold in previous papers???

 

[Jinkglex]

go to the paper compiled by xtreme and check for "gt" for each year attachment.

 

[abdulmoizmehmood]

t

go to the paper compiled by xtreme and check for "gt" for each year attachment.

thanks

 

[littlecloud11]

i cant recall whether he was asking about the cross links or polymer...but if it was addition how come he never showed us any double bonds :/

The main chain polymer couldn't have been a condensation polymer because there was no functional group. It just had -COOH side chains. And the question showed unreacted side chains to make it easier to identify the cross links.

 

[donn]

stella jazz, don't lie

 

[percolatormalwa]

The compound was an arene but it didnt have an acid or amide group. It was a benzene ring with a -CH2-Cl group and an -OH group attached to it.

opps my bad. i do remember not making an acid but i did think there was an amide attached

 

[Aamer Faiyaz]

how many chirals were there in that chiralquestion?

 

[donn]

it wasnt easy at all-the calculations were bad and i couldnt do the equilibria ques either

I know what u r up to. trying to make others get less marks. the eq question was the easiest on the paper.​

 

[stella jazz]

stella jazz, don't lie

I know what u r up to. trying to make others get less marks. the eq question was the easiest on the paper.​

r u crazy?...every 1 here would agree that it was the most difficult question....if u r so smart then let me know how u solved the buffer ques

 

[Aamer Faiyaz]

what was the answer to the buffer question and how many chirals were there?

 

[Jinkglex]

Actually i have an idea on the buffer question..i didnt manage to solve it there but im guessing we had to get H+ conc from pH, then use Ka to find conc. of acid for that H+, then use the conc. of acid given to derive the volume needed of the solution, then add the remainder with salt solution to make it up to 100cm3.

And as far as the polymerisation question goes, idk man, i mean COOH do polymerise between themselves..e.g ethanoic acid turning into glacial? :/

 

[Jinkglex]

i think there were 4-5 chirals..

 

[Jinkglex]

Im guessing by now i've lost atleast 15-20 marks for sure

 

[fathimaash]

Im guessing by now i've lost atleast 15-20 marks for sure

Xactly

 

[ganapathynar]

i think there were 4-5 chirals..

I got 3 Chirals!

 

[Jinkglex]

there were atleast 4, i think :/

 

[ganapathynar]

ok so far i have lost 9 marks! Damn!

 

[Aamer Faiyaz]

what were the order of the reactions? :l

 

[avenger]

condensation. He gave it away by saying small molecule is formed [which is h20 btw]

Evn I wrote condensation and dn watr but many othrs said it ws addition.

i think it was addition. when he said about a small molecule being released, wasnt he talking about the crosslink? the molecule was released during the cross link formation, but the actual polymer was addition. thats what i think