Unsure about AQA C1 examWatch
However I'm unsure about a couple of questions - for the final question on hydrogenation which was "What happens when you react vegetable oil with hydrogen in the presence of a nickel catalyst at 60C"
I put that 'it get harder because the hydrogen reacts with the double bond in the unsaturated fat and opens it up' will I get the 3 marks for it?
Also the question about what happens to the alkane molecules in this experiment (the one about burning paraffin). I put that 'The alkane molecules break down or split apart or crack on the surface or specks of the catalyst forming an alkane and an alkene. This is a form of thermal decomposition'. Again will I get the 3 marks for this?
These 2 questions are really irritating and stressing me out as I feel they'll be the difference between me getting an A or A*.
Thanks in advance
For the second one, they wanted to proabably hear (catalytic) cracking, rather than "crack on the surface" which is interesting considering the alkane is a liquid. Thermanl decomposition is right. and alkane and alkene is right, but you may negate some marking points for saying some wrong things like "the catalyst forming..."