AQA A-Level CHEMISTRY 7405/2 Paper 2 MS June 2022
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AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022. MARK SCHEME – A-LEVEL CHEMISTRY – 7405/2 – JUNE 2022. Organic reaction mechanisms 
Curly arrows should originate either from a lone pair of electrons or from a bond. 
The following representations should not gain credit and will be penalised each time 
within a clip. 
H3C Br H3C Br H3C Br . 
. 
. 
. 
OH OH 
.. 
_ _ 
: 
For example, the following would score zero marks 
H3C C 
H 
H 
Br 
HO 
When the ...