Alkanes and Alkenes

Question 1

Why are alkanes called saturated hydrocarbons?

Answer 1

They have no spare bonds

Question 2

Why don’t alkanes turn bromine water colourless?

Answer 2

They have no spare bonds

Bromine water stays brown

Question 3

Why won’t alkanes form polymers?

Answer 3

They have no spare bonds

Question 4

(Alkanes) What does Monkeys Eat Peanut Butter stand for?

Answer 4

Methane, Ethane, Propane and Butane

The first four alkanes

Question 5

Formula for methane

Answer 5

CH4

Question 6

Formula for Ethane

Answer 6

C2H6

Question 7

Formula for Propane

Answer 7

C3H8

Question 8

Formula for butane?

Answer 8

C4H10

Question 9

What are ALKENES?

Answer 9

Chains of carbon atoms with one or more double bonds.

Question 10

Why are ALKENES called unsaturated hydrocarbons?

Answer 10

Because they have some ‘spare’ bonds left

Question 11

Why will ALKENES decolourise bromine water?

Answer 11

They form bonds with bromine atoms

Question 12

How do ALKENES form polymers?

Answer 12

By opening up their double bonds to ‘hold hands’ in a long chain

Question 13

What are the first two ALKENES?

Answer 13

Ethene and Propene

Question 14

Formula for Ethene

Answer 14

C2H4

Question 15

Formula for Propene

Answer 15

C3H6

Question 16

What are alkanes made up of?

Answer 16

Chains of carbon atoms with single bonds between them