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Competition - post a photo you've taken of nature >>

ocr f321 f322 questions and answers revision

Just a thread to ask each other questions in. leading upto the exam.

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Reply 1
Avatar for scorpio22
scorpio22
OP
12
what type of radiation is absorbed by ch4 and what effect does it have on molecules-2 marks
Reply 2
Avatar for otrivine
otrivine
14
Original post by scorpio22
what type of radiation is absorbed by ch4 and what effect does it have on molecules-2 marks


infra red radiation and causes vibration and stretching of molecules
Reply 3
Avatar for scorpio22
scorpio22
OP
12
Original post by otrivine
infra red radiation and causes vibration and stretching of molecules


descibe ways chemist are minimising climate change due to the release of greenhouses-5marks
Reply 4
Avatar for otrivine
otrivine
14
Original post by scorpio22
descibe ways chemist are minimising climate change due to the release of greenhouses-5marks



-less burn of fossil fuels
-renewable resources
-higher atom econonmy
- less toxic gases being produced such as so2 which contributes to acid rain
- find uses for co2 such as for decaffienated coffee
- proto kotocol
Reply 5
Avatar for Mikes143
Mikes143
Original post by scorpio22
what type of radiation is absorbed by ch4 and what effect does it have on molecules-2 marks


infrared radiation- causes vibration on bonds within the molecules
Reply 6
Avatar for scorpio22
scorpio22
OP
12
Original post by otrivine
-less burn of fossil fuels
-renewable resources
-higher atom econonmy
- less toxic gases being produced such as so2 which contributes to acid rain
- find uses for co2 such as for decaffienated coffee
- proto kotocol


your quick with these replies lol.
-
3/5 simply because it asked for methods of minimising and whilst high atom economy and less toxic recieves this it's not a method but you are on the right track.


you should include
develop carbon capture and storage
e.g:sea bed
-monitoring atmospheric changes
got any questions?
(edited 11 years ago)
Reply 7
Avatar for otrivine
otrivine
14
Original post by scorpio22
your quick with these replies lol.
-
3/5 simply because it asked for methods of minimising and whilst high atom economy and less toxic recieves this it's not a method but you are on the right track.

got any questions?

what is molecular ion peak ?
Reply 8
Avatar for scorpio22
scorpio22
OP
12
Original post by Mikes143
infrared radiation- causes vibration on bonds within the molecules

looking back...it's actually correct ..mark scheme a bit confusing
(edited 11 years ago)
Reply 9
Avatar for scorpio22
scorpio22
OP
12
Original post by otrivine
what is molecular ion peak ?


its a m/z value which gives the mr...not sure
Reply 10
Avatar for otrivine
otrivine
14
Original post by scorpio22
looking back...it's actually correct ..


you forgot about me
and did u get hold of the notes ?
Reply 11
Avatar for otrivine
otrivine
14
Original post by scorpio22
its a m/z value which gives the mr...not sure


its an ion which forms a potivie charge when an electron hits the molecule
your turn:wink:

and can u please send me the notes :smile:
Reply 12
Avatar for scorpio22
scorpio22
OP
12
Original post by otrivine
its an ion which forms a potivie charge when an electron hits the molecule
your turn:wink:

and can u please send me the notes :smile:


im sending ..its a big file and is taking longer than the rest...

construct an equation with ethene and bromine. and stste observation
Reply 13
Avatar for otrivine
otrivine
14
Original post by scorpio22
im sending ..its a big file and is taking longer than the rest...

construct an equation with ethene and bromine. and stste observation


c2h4 + br2 gives c2h4br2
orange to colourless
Reply 14
Avatar for scorpio22
scorpio22
OP
12
Original post by otrivine
its an ion which forms a potivie charge when an electron hits the molecule
your turn:wink:

and can u please send me the notes :smile:


..its done now
(edited 11 years ago)
Reply 15
Avatar for otrivine
otrivine
14
Original post by scorpio22
its still loading on hotmail..its a huge file..its nearly done and its the last one she did

do u have the same for unit 1 as well
Reply 16
Avatar for scorpio22
scorpio22
OP
12
Original post by otrivine
do u have the same for unit 1 as well


no
Reply 17
Avatar for otrivine
otrivine
14
Original post by scorpio22
no


its ok :wink: is my answer correct and did u send still not recieved it
I love these kind of threads :biggrin: :tongue:

Why are alcohols more volatile than alkanes of similar molecular mass?
Original post by otrivine
its ok :wink: is my answer correct and did u send still not recieved it


What notes are these?

Original post by PrincessMedic
I love these kind of threads :biggrin: :tongue:

Why are alcohols more volatile than alkanes of similar molecular mass?


They're actually less volatile due to the hydrogen bonds..

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