Unit 2

Question 1

The test for oxygen?

Answer 1

Re lights are glowing splint

Question 2

The test for carbon dioxide?

Answer 2

Turns lime water cloudy.

Question 3

Test for hydrogen?

Answer 3

Burns with a squeaky pop

Question 4

The test for nitrogen?

Answer 4

No test

Question 5

What is a fuel?

Answer 5

Fuel is a chemical that burns to release energy

Question 6

Name some fossil fuels

Answer 6

Coal
Oil
Peat

Question 7

Fossil fuels are finites what is meant by the word finite?

Answer 7

Non-renewable

Question 8

What is a homologous series?

Answer 8

À homologus séries is a group of chemicals with similar chemical properties and can be represented by a general formula.

Question 9

What is an isomer?

Answer 9

And Isomer has the same molecular formula but has different structural formula

Question 10

What is the formula for an alkane?

Answer 10

CnH2n+2

Question 11

What is the formula for the alkene

Answer 11

CnH2n

Question 12

What is the formula for a cyclo alkane?

Answer 12

CnH2n

Question 13

What is meant by the term saturated.

Answer 13

Saturated as when himologus series has a carbon to carbon single bond

Question 14

What is meant by the term unsaturated?

Answer 14

When a homologous series has a carbon to carbon double bond

Question 15

What is combustion?

Answer 15

Combustion is when something burns with a plentiful supply of oxygen

Question 16

What is incomplete combustion?

Answer 16

Incomplete combustion is when something burns with a limited supply of oxygen

Question 17

What does hydrocarbon contain?

Answer 17

Hydrogen and carbon only

Question 18

What is distillation?

Answer 18

Distillation is when liquids are separated by the difference of boiling points

Question 19

What is fractional distillation?

Answer 19

Fractional distillation is when crude oils are separated by the difference and boiling points

Question 20

What is the test for saturation?

Answer 20

Place the solution in bromine water

Question 21

What happened to the bromine water if it is saturated?

Answer 21

If it is saturated the bromine water stays the same

Question 22

What happens if the bromine water is unsaturated?

Answer 22

If it’s un saturated then the bromine water decolourises

Question 23

What is an addition reaction?

Answer 23

And addition reaction is when the double bond partially breaks and attacking molecule joins on

Question 24

What is it called of hydrogen is added on?

Answer 24

Hydrogenation

Question 25

What is it called if water is added on?

Answer 25

Hydration

Question 26

What happens in cracking?

Answer 26

in cracking heat is used to break the intermolecular forces to make hydrocarbons smaller

Question 27

What do you do to avoid suck back?

Answer 27

Remove the tube before you stop heating

Question 28

What do you do to form an alcohol?

Answer 28

You need to go through a process called fermentation

Question 29

What is fermentation

Answer 29

Fermentation is when an enzyme breaks down carbohydrates to form alcohol and water

Question 30

What is the maximum concentration produced why and why is this?

Answer 30

12% this is because the enzyme stops working

Question 31

What happens after fermentation?

Answer 31

Distillation is then carried out

Question 32

Alkanoic acids can be known by their what group?

Answer 32

Carboxyl group (OOH)

Question 33

Carbohydrates are made up of?

Answer 33

Carbon hydrogen and oxygen

Question 34

Name the two groups of carbohydrates

Answer 34

Sugar and starch

Question 35

How do you make Carbohydrates?

Answer 35

By either photosynthesis or respiration

Question 36

What is hydrolysis?

Answer 36

Hydrolysis is when a molecule is broken down using water

Question 37

What is dehydration?

Answer 37

Dehydration is when a reaction takes place which involves removing water

Question 38

alkanols can be represented by?

Answer 38

Hydroxyl group (OH)

Question 39

What is a condensation reaction?

Answer 39

A condensation reaction is when two molecules react together to produce a large molecule and water