a. What is the trend in boiling point of the fractions? As you get lower in the fractions, the higher boiling point
b. Define viscosity Thickness of liquid
c. What is the trend in viscosity of the fractions? Higher viscosity, higher melting point
d. What is the trend in colour of the fractions? Higher viscosity, darker the colour
e. Why is crude oil separated into fractions? Crude oil on its own is useless, but the fractions are useful
f. What process is used to separate crude oil into fractions? Fractional distillation
g. What physical property allows this process to work? The boiling points
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