Chemistry 9701 7th may ?

[Samina U]

How was the paper guys ? Well we surely can discuss paper now here. Rite ?

 

[Arham 267]

Anybody remembers the value for 'X'? Water? And what was ionic equation? The one we had to balance.

 

[Samina U]

I left that part actually. what was the P in the last question ? The organic one ? and Q was ketone rite ?

 

[Samina U]

and what was the relative abundances for Br-79 and Br-81 ?

 

[Samina U]

When is the marking scheme going to come on net ? Any idea ?

 

[omarjaved619]

I screwed up the Q2 ionic equation.

Also, for the organic question, they said that on oxidation, ONLY ONE ORGANIC product is formed.

So I put a double bond at one end and a methyl group on the second last carbon. Like that we'll get a ketone, and CO2 and H2O on the other side.

BUT, some of my classmates put the double bond in the middle, saying breaking that would give TWO SAME molecules.

Not sure which one is correct.

 

[Samina U]

We had to name the organic compound. what was P and what was Q ?

 

[Samina U]

What was the relative abundances ?
The paper was easy though. Maybe :/ The threshold would be high this time ?

 

[omarjaved619]

We had to name the organic compound. what was P and what was Q ?

My P was 2-methyl-hex-1-ene I think

And Q was pentan-1-one. Not sure about my answers really

 

[Samina U]

So my answer don't match your's :/
I simply wrote hexene

 

[omarjaved619]

What was the relative abundances ?
The paper was easy though. Maybe :/ The threshold would be high this time ?

I attempted it, following the correct method but then screwed up somewhere. I got around 92 and 7% lol. After some Googling, I found out it should be almost 50-50.

 

[Samina U]

what was your relative abundance ? Remeber ?

 

[omarjaved619]

So my answer don't match your's :/
I simply wrote hexene

Oh
Hexene would simply give an aldehyde I suppose

 

[Samina U]

I got 49 point something % and the other as 50.04%

 

[omarjaved619]

what was your relative abundance ? Remeber ?

92 and 7%. Messed up

 

[omarjaved619]

I got 49 point something % and the other as 50.04%

I think your answer is right!

 

[Samina U]

Oh
Hexene would simply give an aldehyde I suppose

yeah may be

 

[Samina U]

I think your answer is right!

Hopefully

 

[Tulaib]

I think your answer is right!

i got 49 and 51

 

[Samina U]

i got 49 and 51

Close to your answer mine was,