C7- Organic Chemistry

Question 1

What is a hydrocarbon

Answer 1

Only contains hydrogen and carbon atoms

Question 2

What is formula for alkanes

Answer 2

Cn H2n+2

Question 3

Alkanes are a homologous series, what is homologous series

Answer 3

A group of organic compounds that react in a similar way

Question 4

Alkanes are saturated compounds, what is saturated compounds

Answer 4

Each carbon atom forms four single covalent bonds

Question 5

What is an example of 4 alkanes and their formula

Answer 5

Methane - CH4
Ethane - C2H6
Propane - C3H8
Butane - C4H10

Question 6

What happens when hydrocarbon properties chain is shorter

Answer 6

Less viscous
More volatile
More flammable
Lower temperature
Lower boiling point

Question 7

What are alkanes

Answer 7

Have at least 1 double bond

Question 8

List fractionating column

Answer 8

LPG - heating and cooking
Petrol - cars
Kerosene- planes
Diesel - trucks/lorries
Heavy fuel oil- ships
Bitumen - roads/roofs

Question 9

What happens as you go down fractionating column

Answer 9

Boiling point gets higher
Becomes less flammable
Viscosity increases

Question 10

What is equation for complete combustion

Answer 10

Fuel + oxygen = carbon dioxide + water

Question 11

What is equation for incomplete combustion

Answer 11

Fuel + oxygen = carbon monoxide/carbon + water

Question 12

What is the test for alkenes and give result of test if an alkene is present

Answer 12

Bromine water
Turns form orange/brown to colourless