Dear Geoff, I am a little confused with the functional group of aldehyde. Should it be aldehyde or carbonyl? In the May 2025 paper, it was stated that aldehyde functional group is not accepted, and the...
S3.2 Functional groups - classification of organic compoundsHello Nazeema, The mark of 7/24 given by the school was upheld during the moderation process so it was moderated to 7/24 but the IA only counts for 20% of the final assessment (see
Sample 1: Genuine marked & moderated IAWhy is the mark moderated to 5.8/20 ? Isn't the total 24?
Sample 1: Genuine marked & moderated IAThanks :)
Data-based question (5)Thank you for this Susan, No-one has pointed it out before (!), but you are quite right the graph axis is now labellled mass / g rather than loss of mass / g.
Data-based question (5)Dear Geoffrey Can I enquire about the graph answer in (b)(ii). If the y axis is mass loss which means how much mass has been lost since the start of the reaction. As gas escapes, mass loss increases over time. Shouldn't this be an increasing...
Data-based question (5)
Geoffrey
Site authorHi Kenny, Another teacher, Maeve, asked about this recently. Have a look at the comments at the foot of the...
S3.2 Functional groups - classification of organic compounds