Chem quiz 5

Question 1

Describe the relationship between molecular size of an alkane and its flammability

Answer 1

The greater the molecular size an alkane, the less flammable it is

Question 2

Explain why crude oil is considered a finite resource

Answer 2

Because it takes longer to form than the rate which it is being used up

Question 3

Name the homologous series of hydrocarbons which makes up the majority of crude oil

Answer 3

The alkanes

Question 4

Other than fuels, give a use for the products of fractional distillation

Answer 4

Chemical feedstock for the petrochemical industry

Question 5

Name the general products of cracking

Answer 5

Short alkanes and alkenes

Question 6

Name the substances that make up the majority of crude oil

Answer 6

Hydrocarbons

Question 7

Describe the relationship between molecular size of an alkane and its boiling point

Answer 7

The greater the molecular size of an alkane, the higher its boiling point

Question 8

Explain how crude oil and natural gas are formed

Answer 8

Ancient plankton died and were covered in sediments

Subjected to high temperature and pressure over millions of years

Question 9

Name the homologous series of hydrocarbons that has double bonds

Answer 9

The alkenes

Question 10

State the conditions required for steam cracking

Answer 10

High temperature and steam

Question 11

State the conditions required for catalytic cracking

Answer 11

High temperature and a catalyst

Question 12

Name five fuels obtained from crude oil

Answer 12

Petrol, diesel, kerosene, heavy fuel oil and liquefied petroleum gases

Question 13

Name the first 4 alkanes

Answer 13

Methane, ethane,propane and butane

Question 14

State the term used to describe families of carbon containing compounds

Answer 14

Homologous series