Chemistry Paper 22 3rd Nov

[$!$RatJumper$!$]

Guys how did you find it

[Deadly_king]

Guys how did you find it

It was so simple that I made lots of silly mistakes.

But I managed to cover up some of them at the last minute

[$!$RatJumper$!$]

thats good.. atleast u covered them up how did u find question one.. what were ur gases, volumes and the mr?

[Deadly_king]

thats good.. atleast u covered them up how did u find question one.. what were ur gases, volumes and the mr?

Ooh...........I never expected this kind of question. I messed it up in the beginning but then I finally resolved it.

Hmm.........my answers are :
i) Oxygen - 20 cm³ has been used
ii) Carbon dioxide - 10 cm³ has been formed.

A was methane CH₄

Did we have to find the Mr in that

[$!$RatJumper$!$]

wow luck yu.. i just could not find it so what are u expecting out of 60 in that paper

[Deadly_king]

wow luck yu.. i just could not find it so what are u expecting out of 60 in that paper

Really? what did you get?

Mr............i think it was another number. i got it to be 42 and the hydrocarbon was propene this time.

Hmm...........i don't know. I think I made a little mistake in the last number and the processes of cracking. Am not sure of my answers for both of them. Otherwise the paper was kinda easy.

I hope to get more than 50. What about you?

[hell0]

wait is this the paper where they had things on the contact process and stuff? 

[Deadly_king]

wait is this the paper where they had things on the contact process and stuff? 

Contact process??

No, we got something on Haber's process. I guess you sat for another variant.

[cs]

my paper has contact process, paper 23, the paper was okay, but i messed up. Deadly King, since you are so awesome, do you know what is the shape of C2O? they asked us to draw it (giving us info- like it should be C-C-O, and no unpaired electrons, and one of the atom is surrounded by only 6 electrons)

[elemis]

CO₂ is linear in shape.

[elemis]

Oh, C₂O is linear in shape as well.

I thought you meant CO2

[Deadly_king]

my paper has contact process, paper 23, the paper was okay, but i messed up. Deadly King, since you are so awesome, do you know what is the shape of C2O? they asked us to draw it (giving us info- like it should be C-C-O, and no unpaired electrons, and one of the atom is surrounded by only 6 electrons)

Do you have any more details about the question

Did it suggest that it is a dimer?

Because oxygen usually has two lone pairs of electrons. If it donates both of them and as well as forming two normal covalent bonds, it will have eight bonded electrons.

No unpaired electrons in the whole molecule or only on carbon or oxygen?

Oh, C₂O is linear in shape as well.

I thought you meant CO2

I don't think so.

[cs]

The question is about about free radical.. definition, and why NH2 as free radical, its C2O, and not CO2. i don't really get the question, i wrote bent as my answer,  

[Deadly_king]

The question is about about free radical.. definition, and why NH2 as free radical, its C2O, and not CO2. i don't really get the question, i wrote bent as my answer,  

Ahaaaa......now it's clearer.

Compound C₂O gotta be : C=C=O

The first carbon atom (left) has two bond pairs of electrons and one lone pair of electron. Hence in all it has 6 electrons around it.

This same carbon will be the radical.

Am afraid the answer is not bent. 

Ari was right. It has to be linear.

[cs]

Ahaaaa......now it's clearer.

Compound C₂O gotta be : C=C=O

The first carbon atom (left) has two bond pairs of electrons and one lone pair of electron. Hence in all it has 6 electrons around it.

This same carbon will be the radical.

Am afraid the answer is not bent. 

Ari was right. It has to be linear.

I think i drew it correctly. i wrote bent cos there's lone pair(which i know- its wrong now), its okay.. but why is it linear, is it because as long as there's 2 bond pair, its linear? ignore the lone pairs? (trying to learn, paper 1 left)..