coatings of pipes
raw materials for the cracking process
fuel for the driving tractors
fuel for jet engines
Explanation
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the question is quite tricky
the residual solid is bitumen
amd bitumen is used for coating pipes
For those who might be having doubts, as regards the tricky chemistry question above... here is a simple explanation.
Diesel oil and Gas: Diesel oil and gas sre nuxtures of HCs with 12 -25 carbon atoms per molecule. They distil over 250°C - 350°C. They are used as fuels for heating and diesel engines and as RAW MATERIALS FOR CRACKING PROCESS.
Bitumen and other residues: These are not fractions, but aomid residues left behind at temperatures above 500°C. BITUMEN or PITCH IS USED FOR SURFACING ROADS AND AIRFIELDS, while other residue may be used as FUEL, in PROTECTIVE PAINTS, as well as in PIPECOATING and WATERPROOFING ROOFS.
Hence, A is legit
