Chemistry Paper 4-theory- doubts =D

[AlishaK]

[Fe(H2O)6-n(NO2)n]^2+ (n=1 to 6)
explain?! xhizors
Q3 (D) why is that ketone getting reduced to -OH using Ni? !
I never learnt that Ni cn b used for ketones redn?!
Do u know? knowitall10

 

[AlishaK]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_41.pdf
3 d Why Br on the benzene ring is in position written in the ms? can't put 'em (non-adjacent thou) anywhere? like 1st nd 5th position?
PhyZac
xhizors

 

[4hsan786]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s11_qp_41.pdf
Please explain 8(b)!

 

[kiara15]

chemguide.co.uk
follow this link..it's very good. Go to CIE syll. support

no topics about desugn and material

 

[knowitall10]

no topics about desugn and material

http://www.chemguide.co.uk/CIE/sect113menu.html#top

 

[knowitall10]

AlishaK I really dnt knw...but c'mon, u cant just question the question

 

[AlishaK]

AlishaK I really dnt knw...but c'mon, u cant just question the question

I'm afraid what did i do?! :S

 

[knowitall10]

I'm afraid what did i do?! :S

Wassup? What r u askin?

 

[AlishaK]

Wassup? What r u askin?

I really dnt knw...but c'mon, u cant just question the question??! U said that!

 

[knowitall10]

I really dnt knw...but c'mon, u cant just question the question??! U said that!

U got me there

 

[PhyZac]

knowitall10
1 mark answers

What element dont show up in xray and why?

What is the concept NMR works on?

 

[iKhaled]

knowitall10
1 mark answers

What element dont show up in xray and why?

What is the concept NMR works on?

PhyZac are u testing her or u need help lol ? :S

 

[knowitall10]

PhyZac are u testing her or u need help lol ? :S

Yea... PhyZac u testing me or what?

 

[iKhaled]

Yea... PhyZac u testing me or what?

come on answer without cheating! dont open the book

 

[knowitall10]

knowitall10
1 mark answers

What element dont show up in xray and why?

What is the concept NMR works on?

hydrogen...cz it's too small..

NMR works on.....ummm......... Allah Knows

 

[knowitall10]

come on answer without cheating! dont open the book

i didn't..that's y: Allahu A3lam

 

[PhyZac]

iKhaled and knowitall10

I need help..badly...!

thanks for first question EDIT: Jazaki Allah khairan, i know those are silly questions but i remembr them in papers...May Allah s.w.t bless you with highest grades

now second?

 

[Ramsha007]

Assalam-o-Alikum
plz Can anyone tell me how do we know that the height ratio is 3:1 or 9:6:1 in mass spectrum containing chlorine isotopes as stated in chem guide?

 

[iKhaled]

iKhaled and knowitall10

I need help..badly...!

thanks for first question

now second?

oh okay xray.. when u talk about that do u mean xray-crystallography ?

and NMR concept is that it provides an external magnetic field where the hydrogen nucleus in the molecular environments of the organic compound spin in the direction of the magnetic field or against the direction of the magnetic field..the hydrogen protons are like tiny magnets (u can imagine it that way)

 

[PhyZac]

oh okay xray.. when u talk about that do u mean xray-crystallography ?

and NMR concept is that it provides an external magnetic field where the hydrogen nucleus in the molecular environments of the organic compound spin in the direction of the magnetic field or against the direction of the magnetic field..the hydrogen protons are like tiny magnets (u can imagine it that way)

Yup that thing

and Jazaka Allah khairan!!!! I have feeling this is coming..!
Thanks alot! Nice explanation ! May Allah s.w.t bless you with highest grades Aameen!