Chemistry P4| A2 only

[smartangel]

guys plz help meo ut with this one...
http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w11_qp_41.pdf
Q2a..how is it 1st order with respect to H+..im getting zero :s​

 

[Amy farvin]

ppl i just found this site really gud. hope it will be helpful.
http://studyguide.pk/Notes/Chemistry/fiveless_chemistry.pdf
if i find more i'll post it.

 

[Amy farvin]

This too is a gud one..
http://studyguide.pk/Notes/Chemistry/erpz_chemistry.pdf

 

[desmondyap93]

http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w10_qp_41.pdf
Question
6 (b)
6 (c) (i) (ii)
Seriously, I'm darn weak in cyclic compound.....I looked at the marking scheme but I still can't figure them out.
Anyone knows please teach me, thanks in advanced! =)

 

[princesskt]

http://www.xtremepapers.com/papers/...d AS Level/Chemistry (9701)/9701_s08_qp_4.pdf
HELP ME WITH Q1 a(ii)..............plz
shouldn't it be 1.36-0.77 according to Ered-Eoxi
the correct ans is .77-1.36 in the ms

 

[Amy farvin]

this too is gud..
http://studyguide.pk/Notes/Chemistry/Organic Chemistry By Jayanathan - www.studyguide.pk.pdf

 

[smartangel]

http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_s11_qp_43.pdf
Q3c..plz tell me how do we dedude the products??

 

[Amy farvin]

this contains imp organic equations can be useful and helpful..
http://studyguide.pk/Notes/Chemistry/A Level Chem Organic Forumlae (A2)- www.studyguide.pk.pdf

 

[ramadan]

i sometimes feel like some questions in the inorganic part of section A are out of syllabus ? is this true or not

 

[Romeo10]

Pleaseeeeeee guys can anyone tell me how do u balanceeee the equationnnn in Number 5 in N07 pleaseeee help guysssss i just cant balance the equation

 

[saudha]

ok ...can nybody tell me wht do u mean by delocalisation of lone pair on pi bond of the benzene ring​

 

[saudha]

i sometimes feel like some questions in the inorganic part of section A are out of syllabus ? is this true or not

they are not out of the syllabus .... itis just tht the equations are twisted up.....just to confuse us a little bit.....i feel tht tooo but if u try out the equations ull find it easy ...really u maight t ake a lill time to work over it...but ull succeed

 

[saudha]

can any one pls help with the q
how is it 1st order with respect to H+.....

 

[saudha]

how does an electron withdrawing or donating group.......affect acidity of a compound....
wht do these withdrawing and donating mean?

 

[namename]

Ecell = Ereduction-Eoxdiation right?

is it different if it is electrolysis? - then check w10 43 5b)... am i weird?

 

[smartangel]

can any one pls help with the q
how is it 1st order with respect to H+.....

EXACTLY. i"ve asked this question so many times. no one replied

 

[namename]

EXACTLY. i"ve asked this question so many times. no one replied

It is easy.. from the first and second row, u can know that CH3CHO is 1st order.
From the first and third row , u can know that the run 1st order wrt CH3OH
From the first and fourth,

(0.2/0.2) x (0.16/0.1)x(0.1)(0.05) is 3.2, therefore it is also 1st order wrt H+

 

[smartangel]

It is easy.. from the first and second row, u can know that CH3CHO is 1st order.
From the first and third row , u can know that the run 1st order wrt CH3OH
From the first and fourth,

(0.2/0.2) x (0.16/0.1)x(0.1)(0.05) is 3.2, therefore it is also 1st order wrt H+

umm..i dont get it.. the way i do it is that we keep the conc of all other except the one whose order we are finding constant. why are you using .16/.1? :S

 

[aliya_zad]

can any one pls help with the q
how is it 1st order with respect to H+.....

Ive done it..see if it'll help!

smartangel

 

[aliya_zad]

Ecell = Ereduction-Eoxdiation right?

is it different if it is electrolysis? - then check w10 43 5b)... am i weird?

no Youre not weird..lol
In this case u calculate seeing the E0 valus of o2 and the cathode reaction theyve given!
If eo value is more positive for one u consider that to be undergoing reduction and the other to be undergoing oxidation..
In this case u cant assume reduction to occur at cathode..