I think it's A but here's an explanation anyway: as you heat the crude oil, the different hydrocarbons, having different boiling points, boil and evaporate up the column. Those with lower boiling points, shorter in chain length, will condense nearer the top of the fractional distillation column. Those that are more viscous, larger in chain size, will have high boiling points, so will evaporate last and condense lower down in the column. Therefore, you achieve all the different oils / materials (oil, petrol, gasoline, tar etc etc). I hope this helps. If not, then a good website to use is 'BBC bitesize, fractional distillation'.
The correct answer would be coal.
Answer:
The colour white is used to show barren land on topographical sheets.
Explanation:
Open scrub and seasonal streams are two features in the map that indicate the region has seasonal rainfall.
Rivers, steams and ponds/tanks are dry in nature.
Barren land shown in white colour also indicate tht the region has seasonal rainfall.
This photo has facts about that info on it
