Chemistry: Post your doubts here!

[Mts.99]

what was the 2 mark equation for NH2COCH2CHNH2COOH and H2SO4?

 

[nishant sapkota 123]

what were we supposed to write for hydrosis of amino acid where amide was to be hydrolysed.Did we need to even involve sulfuric acid cos hydrolysis was done by water right??

 

[Mts.99]

three carbon containing products

yes so there was ethandioc acid, 2 other products one of which was given..so why didnt we count carbon dioxide as carbon containing product

 

[Zaki ali asghar]

actually ethandioc acid was further oxidized to CO2

 

[chichibung]

Predictions for paper 41?

 

[Mts.99]

actually ethandioc acid was further oxidized to CO2

ohhhhhhhhhh righttt

 

[Cherry lava]

wasn't it for nitration of phenol?

It was about phenol

 

[abbas haider]

well i wrote plot conc with time if half life is constant the 1st order and plot rate with time if straight the 1st order but im not sure

rate against time?? never heard of that ... It was Rate against concentration...

 

[haithsoul]

rate against time?? never heard of that ... It was Rate against concentration...

View attachment 63600

yes yes my bad wrote it in a hurry

 

[Tauqir_hamed]

Btw, are october nov thresholds higher than may june ? I have seen this trend many times.. for papers of similar difficulty as well

 

[sarmadimran]

Icl+h2=hcl+hi then hi+Icl= hcl+I2

H2+ICl= H2ICl then H2ICl + ICl = 2HCl +I2. Is this acceptable?

 

[Tauqir_hamed]

what might the threshold be for chem.. varient 12,22,33,42,52.. do u guys think it will be above 205?

 

[aloo Kha]

so what's the answer? ethanedioic acid or CO2?

 

[abbas haider]

Btw, are october nov thresholds higher than may june ? I have seen this trend many times.. for papers of similar difficulty as well

Yes you are correct, I guess some People don't take mayjune seriously...and then retake In Oct NOv with full preparation...btw I think the Gt would be between 60-65 for P4

 

[ThePacifics]

chemistry paper 41 anyone lmao

 

[Ahmed kooheji]

Yeah I did p41 today.. don’t ask for answers cuz I’m not sure if mine ..

 

[anastasia grey113]

what was the 2 mark equation for NH2COCH2CHNH2COOH and H2SO4?

well the reactant was water
but over the arrow we had to write H+
i think it acts as a catalyst thats y

 

[anastasia grey113]

Temperature was 2836 and volume 448cm^3

well i think its shoulda been 2835
becuz rounding it off to 836 would give a positive G

 

[anastasia grey113]

cis trans was 3, actually there were 4 but two of the were same so total 3

wait there were 3 double bonds
so werent v supposed to have 8 isomers?

 

[Cherry lava]

these are for benzene, for phenol just dilute HNO3 at rtp

i wrote dil. hno3 and h2so4 at room temp
is it wrong ?