Qualification > Sciences
ALL CIE CHEMISTRY DOUBTS HERE !!
elemis:
I'm watching a movie right now. I'll answer this in 30-40 minutes time.
EDIT : Answering it now.
elemis:
The question says 1cm3 of ice is heated.
Using the formula density = mass/volume you should be able to determine the mass of ice heated.
Next, you must realise that ice is basically water... Can you calculate the no. of moles of water in 1 gram of ice ? Should be easy.
Now, use the formula PV=nRT.
Rearrange for Volume. Remember the volume you calculate will be in m3 NOT dm3.
elemis:
Dehydration results in the removal of a water molecule.
Look at the double bonds in each option... that is where the water molecule was removed from.
Try drawing each structure with an added hydrogen on one of the carbons in the double bond and a OH on the other carbon.
Do not forget this point in the question :
is unreactive towards mild oxidising agents.
Its a hint... Think about it.
elemis:
You should be able to eliminate two of the options straight away.
In this scenario, look for the carboxylic acid group.... COOH. Also, look for carbons with four different structures attached to them.
$H00t!N& $t@r:
--- Quote from: Ari Ben Canaan on May 30, 2011, 03:31:46 pm ---Dehydration results in the removal of a water molecule.
Look at the double bonds in each option... that is where the water molecule was removed from.
Try drawing each structure with an added hydrogen on one of the carbons in the double bond and a OH on the other carbon.
Do not forget this point in the question :
is unreactive towards mild oxidising agents.
Its a hint... Think about it.
--- End quote ---
Oh i see.. so its D because it is the result of dehydrating tertiary alcohol which is unreactive towards mild oxidising agents. ;D
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