Unit One:Crude Oil/Alkenes/Alkanes

Question 1

What is crude oil a mixture of?

Answer 1

Hydrocarbons

Question 2

All the fractions of crude oil are hydrocarbons called _______.

Answer 2

Alkanes

Question 3

1. What are Alkanes made up of?

2. What are Alkanes surrounded by?

Answer 3

1. Chains of carbon atoms

2. Hydrogen atoms

Question 4

Name the first four Alkanes

Answer 4

Methane, Ethane, Propane and Butane

Question 5

What is the general formula of all Alkanes?

Answer 5

Cn H2n+2

Question 6

The shorter the molecules, the more ________ they are.

Answer 6

Volatile (they turn into a gas at a lower temperature)

Question 7

What does cracking (crude oil) mean?

Answer 7

Splitting up long chain hydrocarbons

Question 8

What substances does cracking create?

Answer 8

Petrol, paraffin and ethene (for plastics)

Question 9

What kind of reaction is cracking?

Answer 9

A thermal decomposition (breaking molecules down by heating them)

Question 10

What is the catalyst used in cracking?

Answer 10

Aluminium oxide

Question 11

What are Alkanes?

Answer 11

Hydrocarbons

Question 13

What is the general formula of all Alkenes?

Answer 13

Cn H2n

Question 14

What are alkenes?

Answer 14

Hydrocarbons which have a double bond