C7 - Crude Oil

Question 1

What are hydrocarbons?

Answer 1

A compound that is formed from hydrogen and carbon atoms only

Question 2

What is the combustion reaction formula?

Answer 2

Hydrocarbon + oxygen ➡️ carbon dioxide + water

Question 3

What is crude oil?

Answer 3

A mixture of molecules called hydrocarbons

Question 4

What do short chain hydrocarbons have?

Answer 4

Low boiling points

Question 5

What do long chain hydrocarbons have?

Answer 5

High boiling points

Question 6

What is fractional distillation?

Answer 6

The separation of a mixture into it’s fractions

Question 7

What is cracking?

Answer 7

Converting long chain hydrocarbons into shorter chain hydrocarbons

Question 8

What is an Alkene?

Answer 8

A series of unsaturated hydrocarbons, containing a double bond

Question 9

How do we test for alkenes?

Answer 9

• Use bromine water, which is orange
• Shake alkene with bromine water
• Bromine water will turn colourless

Question 10

Examples of alkane?

Answer 10

Methane - 4
Ethane - 6
Propane - 8
Butane - 10
Pentane - 12
Hexane - 14
Heptane - 16
Octane - 18
Nonane - 20
Decane - 22

Question 11

What is an alkane?

Answer 11

A series of compounds that contain hydrocarbon with single covalent bonds

Question 12

What is the general formula of alkanes?

Answer 12

CnH2n+2

Question 13

What is the general formula of alkenes?

Answer 13

CnH2n