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OCR B (Salters) F332 Tuesday 4th June 2013 Exam Discussion (Now Closed)

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found the test hard think i will hav to retake

Original post by Sensy

What was another use of CFCs? I put for aerosols but I'm not 100% sure

i put that as well

Original post by Sensy

What was another use of CFCs? I put for aerosols but I'm not 100% sure

I wrote aerosol propellants :smile:

:smile:

Original post by sky2

i put that as well

And me

:biggrin:

Is a use of CFC.. "Blowing agent"?
I remember reading it on a past paper once.. but not sure if that was HFC/CFC/Nothing haha

Original post by thelion0

I wanted to rep u but I've u ripped u a lot already

Merci beaucoup :wink:

:wink:

Original post by mcdee

I thought that alcohol was a primary one and then the observation would be a colour change of orange-> green? :s-smilie:

:s-smilie:

ohmygod I have failed :')

You will surely get error carried forward marks (ECF), so you will have picked up marks; don't worry! :smile:

:smile:

Original post by Sensy

What was another use of CFCs? I put for aerosols but I'm not 100% sure

I also put aerosols :smile:

:smile:

Original post by Sensy

What was another use of CFCs? I put for aerosols but I'm not 100% sure

I put propellant in aerosols too, hope its right :s-smilie:

:s-smilie:

Original post by Sensy

What was another use of CFCs? I put for aerosols but I'm not 100% sure

Aerosols, blowing agents etc

Original post by mcdee

I thought that alcohol was a primary one and then the observation would be a colour change of orange-> green? :s-smilie:

:s-smilie:

ohmygod I have failed :')

dont worry i think i have also failed seemed to get more questions wrong than right

What was the systematic name for NO2-?

Original post by sky2

dont worry i think i have also failed seemed to get more questions wrong than right

It was a really awful one, i thought the past papers were bad and then this one came along :')

Original post by Tejmasta

What was the systematic name for NO2-?

Nitrate (III)

Original post by super121

Nitrate (III)

I put that but google keeps telling me that it is nitrite ion not nitrate

You will surely get error carried forward marks (ECF), so you will have picked up marks; don't worry! :smile:

:smile:

Thanks and hopefully! I though it was attached to a carbon at the end of a chain but that all those crazy cyclohexanes and stuff were completely confusing :P

booooomblastruin

Original post by super121

Nitrate (III)

Or Nitrite

Original post by Tejmasta

I put that but google keeps telling me that it is nitrite ion not nitrate

Could we have had Nitrogen (III) dioxide ? How were we meant to know it was nitrite lmao. And nitrate is NO3

(edited 10 years ago)

Original post by mcdee

I put propellant in aerosols too, hope its right :s-smilie:

:s-smilie:

I'm pretty sure it is, that's what it says on wikipedia. You're just showing off :tongue:

:tongue:

I put Nitrogen III dioxide... but seeing as it was 2 marks..
I might get 1 for the (III) haha

booooomblastruin

Original post by MintCrepz

Could have had Nitrogen (III) dioxide ?

I put the same :tongue:

:tongue:

They might allow it if they are feeling kind

1.

Original post by Sensy

What was another use of CFCs? I put for aerosols but I'm not 100% sure

Blowing agents (for plastics)

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