Crude Oil

4. The … length of the fraction decreases from bottom to top, as the number of carbon atoms decreases.
5. ... gas is the top/highest fraction, used in LPG for domestic cooking an heating.
7. Fossil fuels contain a small amount of ....
9. Catalytic … is the process when heavy hydrocarbon molecules are broken up into lighter molecules.
11. Crude oil separation method based on boiling point difference.
13. Temperatures reached in petrol engines is high enough to allow ... and oxygen in the air to combine, produces the oxides that contributes to acid rain.
14. … point is the temperature at which a substance’s vapor pressure is equal to the pressure of the gas above it, the differentiation factor used in petroleum separation method.
15. Fraction used as fuel in buses, trucks, and heavy vehicles, the fraction ranges from C14 – C18.
16. Raw material in the chemical industry.
17. Fraction used as a fuel for aircraft.

1. ... is a product of incomplete combustion of hydrocarbons, poisonous because it reduces the ability of blood to carry oxygen around the body
2. The … of fractions obtained from crude oil separation decreases from bottom to top.
3. Compound made of hydrogen and carbon atoms, simplest form of organic compound.
6. Most commonly used petroleum derivate, used to power cars, is the second highest fraction formed with boiling point ranges between 40°C – 100°C.
7. ... is a black solid produced by the incomplete combustion of hydrocarbons, made of only carbon elements.
8. The main constituent of natural gas.
10. ...rain is formed when the water has a pH lower than 5.6, often has a pH around 4.
12. From bottom to top, the volatility of fractions obtained from crude oil separation ...
16. Fraction used for ships and industrial heating.