Chemistry 42....how did it go?..expected GT

[hassam]

well sticky mucus one was dipole-dipole ryt...??cnt be vdw for sure,,,,,bt cn be H bond

 

[Husnain123]

mucus has hydrogen and disulfide bridges

 

[Husnain123]

http://i142.photobucket.com/albums/r93/salman_sps/imagesa.png

 

[MER]

Hey guys, there was only 1 question regarding some sort of sodium phenoxide molecule and acyl chloride right? How much was that part of the question worth? 3 or 5 marks?

 

[extremeranger]

the whole question (the compound, its isomer and its mechanism) was worth 3marks and these noobs are arguing like it was worth the whole paper

 

[Paradoxical]

the whole question (the compound, its isomer and its mechanism) was worth 3marks and these noobs are arguing like it was worth the whole paper

Well, that makes me feel a bit better about getting it wrong. :s

 

[hassam]

mucus has hydrogen and disulfide bridges

how cud one guess this from the info???
well i bleive VDW is absolutelly false....and H bonds seems to me the msot appropriate anser.....bt wats its justification.......assuming u dont knw anything else abt mucus except wats given in question.....i mean u dont knw that its a glycoprotien

 

[hassam]

well for enthaply change of hydration definition....i wrote when ion completely dissolves in excess of water.......is it ryt or was it a must to mention infinitely dilute soln.?

 

[MER]

@hassam- it's right... btw how much was the part concerning reaction kinetics worth, 4 or 5 marks? I'm hoping that the GT will between 55-60 as it's difficulty level seemed to equal that of May/June 2011 p41.

 

[Husnain123]

GT will be around 65 or low... coz they check for minor details and even if the paper is easy u do make many minor mistakes

 

[Husnain123]

how cud one guess this from the info???
well i bleive VDW is absolutelly false....and H bonds seems to me the msot appropriate anser.....bt wats its justification.......assuming u dont knw anything else abt mucus except wats given in question.....i mean u dont knw that its a glycoprotien

hahah... rightt.. actually i was studying abt cystic fibrosis and by luck came across mucus structure so i remebrd it well

 

[mury456]

im getting 40 what wud you think the grade will be ???

 

[Gooners]

Well, that makes me feel a bit better about getting it wrong. :s

Can ny1 tell the rest of this Q??? The one tht had the mechanism fr isomers fr last 3marks of organic?

 

[mury456]

im getting 40 what wud you think the grade will be ???​

 

[Sannikutti]

Can ny1 tell the rest of this Q??? The one tht had the mechanism fr isomers fr last 3marks of organic?

The isomer is Positional isomerism.Means u can shift ester bond to other part of the molecule on the benzene because after all benzene is kekule structured.
Preferably It means u shift OH to the benzene ring.

The mechanism is esterification normal mechanism.
But they will reach molecule D finally which If we dont know that D which was Isomer of C how
we can do the mechanism even. (

 

[Gooners]

The isomer is Positional isomerism.Means u can shift ester bond to other part of the molecule on the benzene because after all benzene is kekule structured.
Preferably It means u shift OH to the benzene ring.

The mechanism is esterification normal mechanism.
But they will reach molecule D finally which If we dont know that D which was Isomer of C how
we can do the mechanism even. (

Yar i dnt wana kno the ans cuz i dnt remembr the Q! Pls tellme this Question pls! And hw many marks was this!?

 

[Sannikutti]

Oh tht
itwas 3 i guess drawing mechanism and structure of D

 

[MER]

Someone tell me how much mark the reaction kinetics was worth. Not the whole question that is, only the part concerning the reaction kinetics.

 

[Gooners]

Can ny1 pls tell wat was the rate equation???
Nd order wrt reactants?

 

[princesskt]

Can ny1 pls tell wat was the rate equation???
Nd order wrt reactants?

zeroo for co and one for the ion.....