Chemistry Paper 6 (0620)!!

[Saadiya Ahmed]

yes she did! and the answer to test for alcohols is touch it with a lighted splint it burns with a yellow smokey flame. or add a carboxylic acid a sweet smell evolves

Thankuu!!

 

[beewhiz997]

can anyone tell me how to find the Rf value in chromatography

t ofind the rf value, take the distance moved by the point from the base line, and divide it by the distance moved by the solvent front from the baseline.

 

[beewhiz997]

whoever still has to take their exam GOOD LUCK! inshallah we will all get A*!

 

[Abby ay]

Drink it, if it intoxicates you, you go to jail! If it doesn't, then it's not alcohol.

You better write that in your exam!

 

[Hadi Murtaza]

Just finished Chemistry Paper 6! How was it? Personally think it was quite good. Nothing hard, but i messed up some things. Hopefully I only lost 4-5 marks at the most... How was your paper!

What questions came ??

 

[beewhiz997]

What questions came ??

questions that u r gonna solve later

 

[Fuji520]

You better write that in your exam!

will do!

 

[JimmyCarter]

Thankuu!!

ur welcome

 

[Saadiya Ahmed]

Does any of you know how to read measurements from a burette, kinda stuck on that one :s

which variant?

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Thanks..xD
and would an alcohol and a metal react to liberate hydrogen?!

sorry..i went! hope you got the answer, if not then you surely have given the exam

 

[Saadiya Ahmed]

sorry..i went! hope you got the answer, if not then you surely have given the exam

its k...thankfully tht wasnt asked!! xD

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

its k...thankfully tht wasnt asked!! xD

yeah lol

 

[Wasif`]

It was Easy, the last question answer was :- VARIANT 1
1. Place each Corrosion inhibitor in 3 test tube of equal amount.
2. Take 3 steel nails and place them in 3 water bowl.
3. Place each inhibitor in bowl.
5. Leave it undisturbed for 3-4 days in presence of air.
6. After 4 days, Remove the rust which will be Flaky brown solid (FE2OH3.xH2O) and dry them and weigh each of them.
7. The one which has more weigh will be least effective corrosion inhibitor and one with lower weight will most effective corrosion inhibitor.

 

[Hadi Murtaza]

ur welcome

Damn, thats hard, best of luck bro/sis !!

 

[IGCSE O/L student]

JimmyCarter
are you sure that adding carboxylic acids to an alcohol is a test for alcohols?
i wrote that once for a test, and i got it wrong!
my teacher told me the test for alcohols is to add a piece of metal, n hold a lighted splint over the alcohol. if you hear a pop sound, it indicates the liquid is an alcohol.

 

[JimmyCarter]

what? i thot pop sounds was for hydrogen :S and yes i am sure, a layer of an immiscible liquid forms that has a nice smell(ester)

 

[IGCSE O/L student]

what? i thot pop sounds was for hydrogen :S and yes i am sure, a layer of an immiscible liquid forms that has a nice smell(ester)

yes, u hear the pop sound because hydrogen gas is released.

 

[JimmyCarter]

wait, so ur saying metals dissolve in alcohols? i think thats wrong...

 

[IGCSE O/L student]

wait, so ur saying metals dissolve in alcohols? i think thats wrong...

they don't dissolve. they replace a hydrogen atom, n so hydrogen gas bubbles out.

 

[JimmyCarter]

they don't dissolve. they replace a hydrogen atom, n so hydrogen gas bubbles out.

hmm first time i hear about this