CHOLESTEROL chiral centre

[sweetiepie]

i rote samee n watz dat for enthlpy graph

 

[alphabravocharlie]

Which enthalpy graph?
What was the answer to the pH graph, when we mix the period 3 oxides with water and note the pH.

 

[EzioAuditre]

for KMNO4question.. K2Cr2O7 cannot oxidise alkenes to diol but KMN04 can so if K2Cr2O7 can oxidise secondary alcohol so can cold KMNO4 but still there is some confusion

 

[hassam]

and u ll alsoo hav read kmno4 is a powerful noxidising agent

 

[sweetiepie]

da entalpy change X.---->Y AND Y---> Z..

 

[farrukh]

Ans was +2 and -1 ...
dilute manganate in cold condition will NOT oxidize secondary alcohol....this is what i know from study of exam paprs and mark schemes...

 

[alphabravocharlie]

da entalpy change X.---->Y AND Y---> Z..

That was easy, first it went up, then it fell, then it rose, then it fell again to the lowest level [pathetic explanation], i think it was A. x was in the middle, Y at the top and Z at the bottom. Hope you understand. :sorry:

 

[sweetiepie]

thanks i rote A onlyyy....

 

[hassam]

no.......it was up low low..u dihnt mmoved it to left only cnsiderd moving it up

 

[sweetiepie]

so hassam watz da answer.. :%)

 

[hassam]

higher lower lower....ask zishi...he also got it same...all my friendx got this

 

[hassam]

and that was a childish QUESTION

 

[sweetiepie]

not this one entalpy change one which has been repeated ufff i know da answer which u rote.....

 

[Sannikutti]

@sweetiepie
There was only one graph which had two lopes like imnt two vertices and the rest were only 1 vertix
as this was proceeding in two steps
so two activition energy
so two vertices
and oonly one of the graphs had that
so tht one
Guess it was A

 

[sweetiepie]

noooooooooooooooooooooooooo da one x-----.y dleta positive one ..........????????

 

[Sannikutti]

which one u mean??

 

[sweetiepie]

X---->Y DELTA POSITIVE
Y--->Z DELTA NEGATIVE

THIS ANSWER I ROTE C N WAT U ROTE???

 

[Sannikutti]

umnt the graph one rite
with inter mediate and they said
first step is
X-----Y is endothermic
and Y-----X is exothermic rite?

 

[sweetiepie]

ya dix one

 

[Sannikutti]

ya
this question
was repeated
look
at this
q7
http://www.xtremepapers.me/CIE/Internat ... 7_qp_1.pdf