Question 1

What is crude oil primarily composed of?

Accepted Answer

a mixture of different hydrocarbons and impurities

Answer

pure carbon

Answer

pure hydrocarbons

Answer

water and minerals

Question 2

What is the name of the method used to separate miscible fluids (liquids or gases) with different boiling points into individual components?

Accepted Answer

fractional distillation

Question 3

What is the purpose of the fractionating column in fractional distillation?

Accepted Answer

to provide a temperature gradient

Answer

to cool the crude oil quickly

Answer

to store the distilled components after separation

Answer

to heat crude oil until it all vapourises

Question 4

In fractional distillation of crude oil, which of the following fractions has the lowest boiling point?

Accepted Answer

petroleum gases

Answer

diesel

Answer

kerosene

Answer

bitumen

Question 5

Which of the following statement about the separation of components in fractional distillation is true?

Accepted Answer

Components with lower boiling points condense at the top of the column.

Answer

Components with higher boiling points condense at the top of the column.

Answer

Components with higher boiling points are collected as gases.

Answer

Components with lower boiling points condense at the bottom of the column.

Question 6

Which statement about smaller hydrocarbon molecules is true?

Accepted Answer

They have lower boiling points, are more flammable and less viscous.

Answer

They have higher boiling points, are more flammable, and more viscous.

Answer

They have lower boiling points, are less flammable, and more viscous.

Answer

They have higher boiling points, are less flammable and more viscous.

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