Fractional Distillation & Cracking Process

1.

Multiple Choice

30 sec

1 pt

Fractional distillation separates crude oil based on the different __________ of the molecules in the mixture

melting point

boiling point

freezing point

chemical reactivity

2.

Multiple Choice

30 sec

1 pt

Molecules collected at the bottom of the fractionating column tend to be...

more viscous, less flammable and less volatile

less viscous, more flammable and more volatile

more viscous, more flammable and less volatile

less viscous, less flammable and more volatile

3.

Multiple Choice

30 sec

1 pt

Molecules collected at the top of the fractionating column tend to be...

more viscous, less flammable and less volatile

less viscous, more flammable and more volatile

more viscous, more flammable and less volatile

less viscous, less flammable and more volatile

4.

Multiple Choice

30 sec

1 pt

Name the following hydrocarbon

butane

hexane

heptane

hexene

5.

Multiple Choice

30 sec

1 pt

When testing for alkenes (unsaturation) bromine water turns from...

orange --> blue/black

colourless --> pink

orange --> colourless

orange --> clear

6.

Multiple Choice

1 min

1 pt

Which key term is described as the attractive force BETWEEN molecules?

a) Inner molecular forces

b) Outer molecular forces

c) Intermolecular forces

d) Intramolecular forces

7.

Multiple Choice

20 sec

1 pt

Alkenes have the general formula:

CnH2n

CnH2n+1

CnH2n+2

CnHn

8.

Multiple Choice

20 sec

1 pt

What term describes alkene molecules that contain a C=C double bond?

saturated

unsaturated

9.

Multiple Choice

20 sec

1 pt

Alkanes have the general formula:

CnH2n

CnH2n+1

CnH2n+2

CnHn

10.

Multiple Choice

30 sec

1 pt

Where in the fractionating column are shorter chain hydrocarbon molecules obtained?

At the top

At the bottom

11.

Multiple Choice

30 sec

1 pt

What are the 2 products of complete combustion?

carbon dioxide + hydrogen

carbon dioxide + water

carbon monoxide + water

carbon monoxide + hydrogen

12.

Multiple Select

30 sec

1 pt

What are the products of incomplete combustion?

carbon monoxide

water

carbon

hydrogen

13.

Multiple Choice

30 sec

1 pt

Which of these isn't a fraction produce through fractional distillation?

Bitumen

Naptha

Fuel oil

Ethanol

14.

Multiple Choice

30 sec

1 pt

What is crude oil formed from?

Remains of shale gas trapped under the sea bed

Remains of gases trapped in the ozone layer

Remains of plants and animals that died millions of years ago

Remains of animal faeces from millions of years ago

15.

Multiple Choice

30 sec

1 pt

Which bond breaks during cracking?

C-C bond

C-C double bond

C-H bond

C-OH bond

16.

Multiple Choice

30 sec

1 pt

What is cracking?

Process of breaking long chain alkenes into shorter chain alkanes, alkenes and hydrogen

Process of breaking long chain alkanes into shorter chain alkanes, alkenes and hydrogen

Process of separating long chain alkanes into shorter chain alkanes, alkenes and hydrogen

Process of breaking long chain haloalkanes into shorter chain haloalkenes

17.

Multiple Choice

30 sec

1 pt

Which of these is not a condition of catalytic cracking?

Slight pressure

Rhodium catalyst

Zeolite catalyst

High temperature

18.

Multiple Choice

30 sec

1 pt

Which form of cracking produces the highest percentage of alkenes?

Catalytic

Steam

Fractional

Thermal

19.

Multiple Select

30 sec

1 pt

Which of these statements are incorrect about thermal cracking?

Low pressure

Produces high percentage of arenes

Produces high percentage of alkenes

High temperature

20.

Multiple Choice

30 sec

1 pt

Which of these fractions are most in demand?

LPG

Bitumen

Petrol

Gas oil

21.

Multiple Choice

30 sec

1 pt

Which is NOT a property of a long chain hydrocarbon?

Viscous

Flammable

Not very volatile

High boiling point

22.

Multiple Choice

30 sec

1 pt

Which of these substances is not a hydrocarbon?

methane

ethane

propane

butane

ammonia

23.

Multiple Choice

30 sec

1 pt

Crude oil is made up of:

Ethane

Butane

A mixture of different hydrocarbons

Extremely large hydrocarbons which are broken up once extracted

24.

Multiple Choice

30 sec

1 pt

What process happens at each level in the fractionating column?

Evaporation

Condensation

Combustion

25.

Fill in the Blank

30 sec

1 pt

Cracking is a process used to break up hydrocarbon chains because the products are more ................ than the reactants.

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