This discussion is now closed.

Check out other Related discussions

OCR GCSE Chemistry A Paper 4 (Higher) - Friday, June 13, 2025 [Exam Chat]

Scroll to see replies

Reply 100

sylvestra

Original post

by DevSaha

It’s fine it was just one mark

how isn't it water ? any "small molecule produced" question regarding condensation polymerisation is H2O/steam

Reply 101

Dev Saha

nah it said CoCl, so the small molecule is HCl

Reply 102

Dev Saha

This is what gemini said: Yes, the synthesis of nylon, specifically types like Nylon 6,6, often involves the release of hydrochloric acid (HCl) as a byproduct

Reply 103

tilerwhite

Original post

by Sjekekoeow o

10000% sure

yes it was dm^3 but that doesnt mean you divide by a thousand cause i was in grams already and for moles you use grams not kg

Reply 104

Dev Saha

yeah the answer was 23,160 dm3

Reply 105

studious_komi

Guys what was that 2 marker where you had to draw a diagram and idek the product of something (it was after the other diagram q ABT drawing the polymer for polysthene thingy??)

Reply 106

09798bubyyu

Original post

by freyadenees3

Are u sure it was dm because everyone in my class got 23 thousand

The answer line gave the unit as dm^3 I think, so you didn't need to do any conversions - 23 thousand and smth was right

Reply 107

09798bubyyu

Original post

by studious_komi

Guys what was that 2 marker where you had to draw a diagram and idek the product of something (it was after the other diagram q ABT drawing the polymer for polysthene thingy??)

I think you needed to draw propane, because propene + hydrogen gas -> propane. C3H8

Reply 108

studious_komi

How do we think grade boundaries will be
...or will OCR remain evil and increase them to 80 ://

Reply 109

asdresd

are grade boundaries gonna go up or down

Reply 110

Gajendra K

Guys the functionl groups were carboxyl and hydroxyl , L shaped ester link . Calculations were , 0.20 , 23,160 , 4.25, and molybdenium

(edited 10 months ago)

Reply 111

Gajendra K

Original post

by asdresd

are grade boundaries gonna go up or down

grade boundaries were 147/180 in 2023 then 154/180 in 2024 so this year it might be the same becaus e the papers were so easy for me and i just did a few sill mistakes like multiplying 16x3 as 64 where it was 48 it paper 3 leading me to get 84 instead of 76 and the lithium strip thing and the graph 2 marker in paper 4 and the meniuscus titration volume thing

Reply 112

studious_komi

Original post

by Gajendra K

Guys the functionl groups were carboxyl and hydroxyl , L shaped ester link . Calculations were , 0.20 , 23,160 , 4.25, and molybdenium

Hey was 4.25 that 2 marker on the fertilisers?? I thought I got that wrong idkk

Reply 113

Gajendra K

Original post

by studious_komi

Hey was 4.25 that 2 marker on the fertilisers?? I thought I got that wrong idkk

yep did you get fertiler a and did u get the rest of answrs correct

Reply 114

Unbends

Original post

by freyadenees3

Are u sure it was dm because everyone in my class got 23 thousand

It’s was like 46000 kg then you had to find the mole of it by diving it by 44 then after you had the mole u would have to do volume is equal to mol times 24 then it was like 965 mol times 24 and it was like 21360

Reply 115

studious_komi

Original post

by Gajendra K

yep did you get fertiler a and did u get the rest of answrs correct

I don't remember which fertiliser I got 😭 the one with the most nitrogen and er the other p one not the roots one I don't remember

Yes I got that answer for the 2 marker and the rest as well, for the functional groups I wrote carboxylic acid and umm alcohol 🙏🏽🙏🏽

Reply 116

ish4.p

Original post

by Nuunn

wait u had to draw a tangent???

i dont think you had to draw a tangent because i did a past paper question for a graph of rate of reaction and it didnt use a tangent it just got the 2 values and divided them

Reply 117

ish4.p

Original post

by Stveevshs28

I got that one cuz of gcse business 🤣 you can say things like they’re easier to automate, they can produce lots of products quickly, less workers needed etc

what about less frequent shut down periods

Reply 118

C3c3c3

Do u think because the part where the nylon forms wrong I won’t get the marks for how it’s extracted? I accidently put it forms in solution b but I wrote the extraction part correct I think?

Reply 119

C3c3c3

What was the disadvantage of the fuel cell?

Related discussions

Latest

Trending

Articles for you

Students react after GCSE Chemistry Paper 2 on 13 June 2023

How The Student Room is moderated

To keep The Student Room safe for everyone, we moderate posts that are added to the site.

Try out the app

Continue on web