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OCR Chemistry F322~ 4th June 2013~ AS Chemistry

So I put this: CH3CH2CH2COH for the aldehyde. I know it doesn't directly highlight the C=O double bond but is it a structural formula.

Yes, like others said I think you need it to be: CH3CH2CH2CHO for the mark. Probably easier to just draw out the display/skeletal next time. We shall see though.

Reply 4441

TheFootyKing19

10

For the but-2-ene question that asked how can it make N,P,Q,R etc

It said structural formula so I put:

CH3CHCHCH3 + HCL ------> CH3CH2CHCLCH3

Instead of

CH3CH=CHCH3 - would I still get 2 marks?? It said structural formula... I got the reagent and product right....

Reply 4442

Jimmy20002012

OP

4

For the flow chart question did you have to put H20 for each one?

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Reply 4443

Corvill

1

Can anyone tell me if my answers are right or wrong?

For question 1c- suggest the structure of the cyclic hydrocarbon of octane
I drew out a cyclic hydrocarbon with 6 sides and 2 methyl?

For question 5c- Give an everyday use for infrared spectroscopy.
I wrote hydrocarbon based

For question on- Describe and explain how the concentration of ozone is maintained:
I wrote O2 + O <=> O3

For the question on: suggest why the compound burnt in yellow flame and produced black smoke. I wrote lack of oxygen but did not write incomplete combustion.

Lastly, for the question on IR: suggest the two possible structures for M.
For my final answer I wrote it could be aldehyde or ketone. So I drew the displayed formula of aldehyde or ketone which were butanal and butanone but I didn't write in words 'butanal and butanone'. Do you think I will still get the mark since it was asking for structure?

Reply 4444

TheFootyKing19

10

Original post by Jimmy20002012

For the flow chart question did you have to put H20 for each one?

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No. As h2o is not an organic product

Reply 4445

Jimmy20002012

OP

4

Original post by TheFootyKing19

No. As h2o is not an organic product

Cool, thanks :smile:

how did the exam go for you?

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Reply 4446

tomtjl

18

Original post by Corvill

Can anyone tell me if my answers are right or wrong?

For question 1c- suggest the structure of the cyclic hydrocarbon of octane
I drew out a cyclic hydrocarbon with 6 sides and 2 methyl?

For question 5c- Give an everyday use for infrared spectroscopy.
I wrote hydrocarbon based

For question on- Describe and explain how the concentration of ozone is maintained:
I wrote O2 + O <=> O3

For the question on: suggest why the compound burnt in yellow flame and produced black smoke. I wrote lack of oxygen but did not write incomplete combustion.

Lastly, for the question on IR: suggest the two possible structures for M.
For my final answer I wrote it could be aldehyde or ketone. So I drew the displayed formula of aldehyde or ketone which were butanal and butanone but I didn't write in words 'butanal and butanone'. Do you think I will still get the mark since it was asking for structure?

1C) Should have been cyclo-octane
5C) Breathalizers to test drunk drivers
Ozone question - yeah I think that is correct.
Lack of Oxygen should be fine
You shouldn't need to state the names, as long as you drew the structures correctly :smile:

.

Reply 4447

LaurenceM

For an everyday use of infrared spectroscopy would drug analysis be okay answer?

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Reply 4448

science-oliver

11

For and everyday use I put 'monitoring environmental pollution levels'?

Reply 4449

RoryTinker

For the question where you had to name the functional groups, could you have put carbonyl for the C=O

Reply 4450

TheFootyKing19

10

For the but-2-ene question that asked how can it make N,P,Q,R etc

It said structural formula so I put:

CH3CHCHCH3 + HCL ------> CH3CH2CHCLCH3

Instead of

CH3CH=CHCH3 - would I still get 2 marks?? It said structural formula... I got the reagent and product right....

Reply 4451

TheFootyKing19

10

Original post by RoryTinker

For the question where you had to name the functional groups, could you have put carbonyl for the C=O

Nope. It was Alkene and ester

Reply 4452

Freddy-Francis

9

Original post by LaurenceM

For an everyday use of infrared spectroscopy would drug analysis be okay answer?

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Thats wat i put too

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Reply 4453

ShogDX

5

Original post by Freddy-Francis

Damn it. I lost 3 marks :frown:

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Sorry to hear that :/

Reply 4454

scienceboy16

Guys for the last question i did one boltzman diagram (With both the catalyst and temperature on one diagram) followed by 2 sentences or so each on the effect of temp an catalyst seperetly. Would it still be possible to get 6/7 marks on this question it was out of 7 marks.

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(edited 10 years ago)

Reply 4455

scienceboy16

[URL=http://www.thestudentroom.co.uk

(edited 10 years ago)

Reply 4456

wakaas

Hi for the van der waals question near the beggining of the exam i wrote has weaker van der waals forces and after that i wrote has fewer van der waals forces will i still get the mark

Reply 4457

yodawg321

12

Original post by scienceboy16

Guys for the last question i did one boltzman diagram (With both the catalyst and temperature on one diagram) followed by 2 sentences or so each on the effect of temp an catalyst seperetly. Would it still be possible to get 6/7 marks on this question it was out of 7 marks.

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Not sure man, the question did ask for Diagrams so they may of expected us to use more than 1 diagram