Fractional distillation method

Question 1

Fractional distillation is carried out in a fractionating column which is very …………..at the bottom and ………..at the top

Answer 1

hot

cool

Question 2

step 1 Crude oil enters the fractionating column and is heated so

Answer 2

vapours rise

Question 3

Vapours of hydrocarbons with very high boiling points will

Answer 3

Vapours of hydrocarbons with very high boiling points will immediately condense into liquid at the higher temperatures lower down and are tapped off at the bottom of the column

Question 4

Vapours of hydrocarbons with low boiling points

Answer 4

Vapours of hydrocarbons with low boiling points will rise up the column and condense at the top to be tapped off

Question 5

The different fractions condense at different heights according to their

Answer 5

boiling points and are tapped off as liquids

Question 6

The fractions containing smaller hydrocarbons are collected ………………. as

Answer 6

The fractions containing smaller hydrocarbons are collected at the top of the fractionating column as gases

Question 7

The fractions containing bigger hydrocarbons are collected at the

Answer 7

lower sections of the fractionating column

Question 8

The crude oil contains small amounts of other compounds
Some of these compounds may contain

Answer 8

sulfur, and when burned sulfur dioxide can be produced
This is one of the causes of acid rain

Question 9

Fractional distillation is a physical process and not a chemical one, so no covalent bonds are broken. The intermolecular forces between molecules are

Answer 9

Fractional distillation is a physical process and not a chemical one, so no covalent bonds are broken. The intermolecular forces between molecules are broken as the crude oil is heated.You

Question 10

top to bottom of fractioning column

Answer 10

refinery gas

gasoline for cars

kerosene (jet fuel)

disel ( for cars

fuel oil

bitumen (viscous