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OCR A-level Chemistry A Paper 2 - 16th June 2025 [Exam Chat]

Reply 80

Masrooler

4

Original post

by raantaro

cation is an electrophile right they literally only ask abt electrophiles and nucleophiles

Yea we won't need to know about cations it's just referred to as an electrophile like you said

Reply 81

raantaro

7

im actually praying for one of those functional group testing questions and a 6 marker where u calculate a mass and describe purification... absolutely stunning questions

Reply 82

coolbeans85

6

No the person who made the predictions for paper 1 on the student room forum

Reply 83

raantaro

7

guys im so worried im weaker at organic and its so scary to only be able to lose like a max of 15 to guarantee an A

Reply 84

4020LeKo18

9

Original post

by Dhddjdjdjdnrn

Is there any long wordy questions we need to memorise answers for this paper other than benzene and phenol reactivity and practical based questions ?

I think that’s it tbh but I’m not 100% sure 😭, Ive been focusing on physics a bit more tbh 💀

Reply 85

ssara_0709

9

Aghh so much to memorise 😔

Reply 86

Glaurung

11

Do we have to know about amide dehydration to nitriles

Reply 87

yuyrujagth

11

Original post

by Glaurung

Do we have to know about amide dehydration to nitriles

no

Reply 88

leisurely-expert

15

Original post

by Glaurung

Do we have to know about amide dehydration to nitriles

Here's everything we should be able to know. Hope that helps.
Aliphatic:

Aromatic:

Reply 89

coolbeans85

6

Any predictions where is the predictions lord

Reply 90

yuyrujagth

11

whats the difference between ez and cis trans?

Reply 91

jremmy

9

Original post

by jjnbnmmm

cations are negative right gng or am i getting a U

Cations are positive because the t looks like a +

Reply 92

ems1213

2

Do we need to know about ztwiterrion ions? I was doing topic questions and saw this but might've been in the old spec?

Reply 93

4020LeKo18

9

Original post

by ems1213

Do we need to know about ztwiterrion ions? I was doing topic questions and saw this but might've been in the old spec?

Nah it’s in the old spec we don’t need to know it

Reply 94

4020LeKo18

9

Original post

by yuyrujagth

whats the difference between ez and cis trans?

E/Z you need to have 2 different groups on each C atom of the C=Cdouble bond, as well as cis/trans, with E/Z you apply the CIP priority rules, where the highest Mr group is the priority and if the priority groups are on the same side of the double bond then it’s a Z isomer and if on the different side, it’s an E isomer and with cis/trans it has to be 2 of the same groups, if they are on the same side it is cis and on opposite sides of the double bond it is trans, hope that helps!

Reply 95

yuyrujagth

11

Original post

by 4020LeKo18

E/Z you need to have 2 different groups on each C atom of the C=Cdouble bond, as well as cis/trans, with E/Z you apply the CIP priority rules, where the highest Mr group is the priority and if the priority groups are on the same side of the double bond then it’s a Z isomer and if on the different side, it’s an E isomer and with cis/trans it has to be 2 of the same groups, if they are on the same side it is cis and on opposite sides of the double bond it is trans, hope that helps!

thanks that helps! I was doing a model question and they compared the proton number instead of the atomic mass, would it still work the same?

Reply 96

mariam mostafa

9

Any predictions for the exam tomorrow

Reply 97

ahsbsdfhkasd

8

Original post

by yuyrujagth

whats the difference between ez and cis trans?

Cis/trans there's a common group on both e.g. H in E/Z thats not the case

Reply 98

leisurely-expert

15

Original post

by mariam mostafa

Any predictions for the exam tomorrow

My predictions (I don’t know if they are right so pls revise everything):

•

Most likely we're going to get some sort of question on NMR (maybe a 6 marker bc they come up quite a lot).

•

A nice synthesis flowchart question (there was one last year)

•

Some kind of practical question (recrystallisation, purification, melting point determination)

•

A mechanism question - e.g. nitration of benzene or something like that

Reply 99

leisurely-expert

15

Original post

by ahsbsdfhkasd

Cis/trans there's a common group on both e.g. H in E/Z thats not the case

Can it be any group (e.g. CH₃)or does it have to be H?

OCR A-level Chemistry A Paper 2 - 16th June 2025 [Exam Chat]

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