OCR GCSE Chemistry A- C7 + Ideas In Context, May 24th 2012. OFFICIAL THREAD

Something which I think will come up: What are the problems with using artificial fertilizers?

No way it would have been a 4 mark question if it asks you to define something, 1 mark for those questions.

1) what are the 4 alkenes?

2)What is an exothermic and endothermic reaction?

1) methane, ethane, propane, butane
2) exothermic reaction releases energy to the surroundings (new bonds are made). The products have less energy than the surroundings. Endothermic reactions takes in energy. They happens when the bonds are broken.

1) What are the advantages of Thin layer chromatography when compared to the normal one?
2) Explain titration?

Anyone ask more questions please

What are the esters of Glycerol and Fatty acids?

Describe Distillation

Why is Waste Biomass a more sustainable method of making ethanol than Fermentation?

Oil an water

Distillation is the process the mixture get heated/condensed/purified. The product is collected at its boiling point in the condenser and then collected in a beaker.

i dont know the last one. Tell me asnwer

What are the esters of Glycerol and Fatty acids?

Describe Distillation

Why is Waste Biomass a more sustainable method of making ethanol than Fermentation?

so is everyone pulling all nighters or getting a good night's rest? :P

Guys a key point, Ethene/ethane is made from crude oil.
Crude oil has a finite amount, therefore not sustainable

Hydrocarbons are made from crude oil ----they like to bring that one up a lot.