C6.2.2 - Alkenes

Question 1

Are alkenes hydrocarbons?

Answer 1

Yes

Question 2

Why are alkenes unsaturated?

Answer 2

They have a carbon to carbon double covalent bond

Question 3

What is the general formula for alkenes?

Answer 3

CnH2n

Question 4

What is a functional group?

Answer 4

A group of atoms or type of bond in a molecule that is responsible for the characteristic reactions of the substance

Question 5

What does the carbon to carbon double bond allow alkenes to do?

Answer 5

Undergo addition reactions

Question 6

What happens in an addition reaction?

Answer 6

A group of atoms combine to form a larger molecule with no other product

Question 7

What do alkenes produce when reacting with bromine?

Answer 7

Dibromo compounds

Question 8

What does ethene + bromine produce?

Answer 8

Dibromoethane

Question 9

Does bromine react with alkenes or alkanes?

Answer 9

Only alkenes

Question 10

What happens when Orange brown bromine water reacts with an alkene?

Answer 10

It turns colourless

Question 11

How do alkenes produce alkanes?

Answer 11

They undergo addition reactions with hydrogen in the presence of a nickel catalyst