[QUOTE=AlphaNick;48080200]Because climate change is vague - global dimming / warming are classed as climate change but carbon dioxide doesn't cause dimming.
No, you said it forms 'acid rain' - implying that rain is previously devoid of acidity.
I know, but still you answered the question incorrectly, it should be comparing advantages / disadvantages of using biodiesel instead of petroleum - not the advantages / disadvantages of either.
Close enough but you probably got one mark maximum.
Because do you really think that testing the experiment at 1 degree lower causes such an increased rate of reaction that it makes the unsaturated oils more effective at decolourising bromine water?
Yes, the named one had 16 drops, so did another one. So they were identical in unsaturated oils.
Yeah well it was a more solid answer by far.
Because the price of copper depends on the extraction method and reserves supplies.
So? Spec says that you're not meant to know about exothermic/endothermic reactions, but C1 June 2013 had a question "What type of reaction is this?" Answer was exothermic.
Nope - it was just the mass of calcium oxide produced - not the products as a whole, you had to ignore the production of CO2. Did you misread the question?[/QUOTE]
I think I might have misread the question for this question, what did you put?
For question 1b could you say carbon released when incomplete combustion occurs would cause global dimming?
Did you have to specifically mention vergio in comparison to A and B? I just said that x has the least amount of unsaturated fats and x has the most?