Chemistry: Post your doubts here!

[♣♠ Magnanimous ♣♠]

oh ok but tht would b awsome if tomorows ppr is repeated too
and we all get As inshAllah

lol.. hahaha hope so kitkat <3 :P agar esa hua to asma nachegi isn't it

 

[kitkat <3 :P]

lol.. hahaha hope so kitkat <3 :P agar esa hua to asma nachegi isn't it

mainy muhkil se 2 3 paper kiye hain wo bhi aadhy -_-

 

[..sacrifice4Revenge..]

ok
did u noticed tht in june 13 variant 11 alll questions were repeated!

Yep, like 10 of them were from 2010 papers

 

[Kamihus]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_w03_qp_1.pdf
Q40
Why isn't statement 2 right?

 

[♣♠ Magnanimous ♣♠]

mainy muhkil se 2 3 paper kiye hain wo bhi aadhy -_-

ab kya kare tumhara yar! koi to hoga copy karwano ko

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w03_qp_1.pdf
Q40
Why isn't statement 2 right?

bro i think Na only replaces H and not others..

 

[Rockstar RK]

sorry for being late was making this
2 mole of OH gives 1 mole H2
2 mole of COOH will give 1 mole of H2

Its amazing.... You have knowledge of every damn question!!! ALL I CAN OFFER IS I CAN SOLVE UR DOUBTS IN PHYSICS MCQ PAPER

 

[Kamihus]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_w04_qp_1.pdf
Also in this Q21, why not C?

 

[Rockstar RK]

Its amazing.... You have knowledge of every damn question!!! ALL I CAN OFFER IS I CAN SOLVE UR DOUBTS IN PHYSICS MCQ PAPER

And will u solve my a level doubts till Nov. 2014??????? Please dont deny me

 

[..sacrifice4Revenge..]

PLEASE HELP GUYS, I STUDIED POORLY. WHAT SHOULD I REVISE. I NEED AT LEAST AN A GRADE. HELP!!!!

Pretty soon you realise it, no?
Concentrate on theory now and do atleast 4 pprs of different years, you got 9hrs..

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s13_qp_11.pdf
in Qs 32 i dont get 3rd statement
and QS 11

3rd statesmen means it is less likely to donate electrons in the see of electrons if it has higher ionisation energy
so that mean Group 2 elements are not likely to donate so it is against it having a higer melting point the more the delocalised sea of elctrons the stonger the lattice hence higher the melting point
Q11 check out the data booklet for the equation of MnO4-
it is MnO4-+8H++5e-= MnO2+ +4H2O
and we have
Sn2+=Sn4+ +2e-
make the electrons equal
to do this
(Sn2+=Sn4+ +2e-)*5 and (MnO4-+8H++5e-= MnO2+ +4H2O)*2
now the mole ratio
Sn2+:MnO4-
5:2
Moles of Sn2+=9.5/190=0.05
and so moles of MnO4- =0.02

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w04_qp_1.pdf
Also in this Q21, why not C?

Chemistry: Post your doubts here!

 

[ZaqZainab]

Its amazing.... You have knowledge of every damn question!!! ALL I CAN OFFER IS I CAN SOLVE UR DOUBTS IN PHYSICS MCQ PAPER

Its kind of you to offer and no its just a coincidence that you guys are asking stuffs i know

 

[Kamihus]

bro i think Na only replaces H and not others..

Then in Q29 here:
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w13_qp_11.pdf
D should be wrong.

 

[Rockstar RK]

Its kind of you to offer and no its just a coincidence that you guys are asking stuffs i know

Will u please please please please please please please please please solve my doubts of a level till Nov. 2014..... I am teacherless

 

[ZaqZainab]

That's what i was thinking but i explained him in words i hope he gets your lang as a good and understandable

I have bad explaining skills

 

[princessnoor]

3rd statesmen means it is less likely to donate electrons in the see of electrons if it has higher ionisation energy
so that mean Group 2 elements are not likely to donate so it is against it having a higer melting point the more the delocalised sea of elctrons the stonger the lattice hence higher the melting point
Q11 check out the data booklet for the equation of MnO4-
it is MnO4-+8H++5e-= MnO2+ +4H2O
and we have
Sn2+=Sn4+ +2e-
make the electrons equal
to do this
(Sn2+=Sn4+ +2e-)*5 and (MnO4-+8H++5e-= MnO2+ +4H2O)*2
now the mole ratio
Sn2+:MnO4-
5:2
Moles of Sn2+=9.5/190=0.05
and so moles of MnO4- =0.02

higher ionisation mean high melting point ryt? and in data booklet the values are higher

 

[♣♠ Magnanimous ♣♠]

Then in Q29 here:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w13_qp_11.pdf
D should be wrong.

ZaqZainab ao idhar

 

[♣♠ Magnanimous ♣♠]

Will u please please please please please please please please please solve my doubts of a level till Nov. 2014..... I am teacherless

same here dushyant!

 

[ZaqZainab]

Will u please please please please please please please please please solve my doubts of a level till Nov. 2014..... I am teacherless

Sure Unless i too don't know