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http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_42.pdfcan you post the paper no.?
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http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_42.pdfcan you post the paper no.?
i will first explain the wrong answers!
D = because it is a tertiary aldehyde so it wont react!
A = the basic CH3CO2CH3 structure is being disturbed, when reacting only the functional groups will react
B = it could have been the answer but in our question, the molecule of CH3CO2CH3 was ionised to -CH2CO2CH3, with H being removed from the 1st carbon but as you can see in this it has reacted with the 3rd carbon of the molecule so this one wont do either!
so our answer is C because it does not disturb the CH3CO2CH3 molecule and the reaction is taking place at 1st carbon!
hope you understood it!
i think it is a little confusing, if you dont get it i will try explaining again!
i hope this helps
if not then you can still ask again (but i hope you get it this time)
i hope this helps!
thanksss alott man!! (Y) got it real good... hopefully wont forget it either...i hope this helps!
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_42.pdf
Q 5c(iii) & (iv)
which reaction exactly r they referring to in iii ??
please explain iv
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_42.pdf
Q 5c(iii) & (iv)
which reaction exactly r they referring to in iii ??
please explain iv
you can try on youtubeplz help...i cant figure ot the organic molecules using he NMR spectra ...how to do it?
thank uyou can try on youtube
i searched it and found a very good video recently
just type NMR spectroscopy and you will get a bunch of options, choose the one from the user
sooo... we're supposed to know that we remove the double bond in benzene to make it harder?i fouund the answer to part (iv)
benzene rings form rigid structures and make the polymer less flexible
so in order to make it flexible, make it into a cyclic acid or remove the double bond in the benzene
sooo... we're supposed to know that we remove the double bond in benzene to make it harder?
You are supposed to know that around double bonds there is a restriction of the carbon bonds and that for single bonds there isn´t.
ummm .... sorry didn't get it... can u elaborate on that plz??You are supposed to know that around double bonds there is a restriction of the carbon bonds and that for single bonds there isn´t.
why is there a restriction for rotation??* A restriction for the bonds to rotate, thus becoming less flexible.
for the time part be as deft as possible and should practice titration as much as u can in the laboratory along with the calculations becz there just is no other way to perfect it....regarding chemistry as level practicals, how are we supposed to estimate the rough titre? and how to manage time with doing the experiment as well as doing the calculations? please answer as possible. thanks in advance.
why is there a restriction for rotation??
Well, dont know if im right so if im not please do correct me!
Its because when you have double bonds like in ethene, the pi system (which has a pi lobe above and below the plane) doesn´t allow rotation because there is no space for it to rotate (since its occupied by the pi lobe)
why is there a restriction for rotation??
yes the restriction is there because of pi-bondWell, dont know if im right so if im not please do correct me!
Its because when you have double bonds like in ethene, the pi system (which has a pi lobe above and below the plane) doesn´t allow rotation because there is no space for it to rotate (since its occupied by the pi lobe)
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