chemistry p61 (liquid M)

[jhoseftarek]

I wrote sodium bromide, is it correct :Search: :Search:

 

[moonlight22]

I think it`s Ammonia , there were some extended questions right ?

 

[moonlight22]

I found out that the 1st guessing is always more accurate un4tunetly I wrote ammonia :shock:

 

[PUSHPAK1321]

It is definitely alcohol, as it smells like antiseptic, and is inflammable (indicating the prescense of hydrocarbon). But confused between alcohol and ester. :s

 

[Ramosk95]

i thought it was ethanol but when they said yellow gas i wrote sulfuric acid but i'm sure i'm wrong but anyway the exam was a bit hard for me and i'm afraid that cie puts boundaries instead of curves

 

[moonlight22]

It is definitely alcohol, as it smells like antiseptic, and is inflammable (indicating the prescense of hydrocarbon). But confused between alcohol and ester. :s

Well, i think ehanol is highly flammable therefore they cover it with a lid !! << I saw this in 1 of the notes

 

[jhoseftarek]

but doesnt alcohol burn with a blue flame?

 

[Mclovin]

Unsaturated Hydrocarbons burn with a yellow flame

 

[Natashakhan]

i wrote sodium bromidee..!!!

 

[Divalicious]

I wrote aqueos sodium hyrdoxide >.>
The yellow flame made me think of sodium, but later I found out it's actually ethanol.
But isn't iodine purple in organic solvents? But it said it turned orange-brown...

 

[Ali4lyf]

I wrote aluminium. ph 8-12 lolx sad

 

[nanalala12]

i also wrote sodium bromide but all my frnds wrote that it was ethanol & i dnt think it's ethanol because the flame colour included in our syllabus indicate that yellow stands for sodium ! maybe its sodium etahanoate ?

 

[Divalicious]

Well whatever it is, we can all agree that the examiner was being a b**** for putting that question xD
I mean seriously, the table of tests question has never been that hard.

 

[alexxx04]

i also wrote sodium bromide but all my frnds wrote that it was ethanol & i dnt think it's ethanol because the flame colour included in our syllabus indicate that yellow stands for sodium ! maybe its sodium etahanoate ?

Flame colours are NOT required in IGCSE Chemistry, check the Y11 syllabus it's not included ;-)
Therefore, the yellow flame does not indicate sodium by any means!

I answered concentrated alcohol, mainly because of the antiseptic smell and somehow I thought they'd ask for something organic at least once in the paper.
Supporting this view, from Wikipedias Article on Iodine solubility: 'Aqueous and ethanol solutions are brown reflecting the role of these solvents as Lewis bases.'
And it said that if liquid M is added to a crystal of iodine, a brown solution forms.

 

[Oliveme]

i agree with divalicious!

 

[haochen]

i wrote organic coumpond, alkane/ alkene
coz the thing i concentrated is smell
so in prvious past paper it is something like petrol so the answer is hydrocarbon, alkane/alkene
thats why i wrote like it
(i dont think its correct )

 

[drugdealer]

clorineeeeeeeeeeeeeeeeeeeee

 

[HorsePower]

what did u guys right about the flame produced by liquid N and wat was the colour of iquid N

 

[TatsuEG]

i wrote organic coumpond, alkane/ alkene
coz the thing i concentrated is smell
so in prvious past paper it is something like petrol so the answer is hydrocarbon, alkane/alkene
thats why i wrote like it
(i dont think its correct )

Its surely not an alkane because it would turn colourless not orange brown

 

[TatsuEG]

what did u guys right about the flame produced by liquid N and wat was the colour of iquid N

I believe there was no flame on N , and I didn't notice "Liquid N" so I wrote purple solid XDDD