Chemistry Paper 2 Flashcards Preview

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Flashcards in Chemistry Paper 2 Deck (49):
1

What is a closed system?

No substance was leave or enter

2

What is a fuel?

Something burned to release heat

3

How is crude oil formed?

Fossil remains of plankton formed over million of years

4

What is a property of long-chain hydrocarbons?

Vicious

5

What is a saturated hydrocarbon?

Molecule that only contains hydrogen and carbon and no double bonds

6

What is the general formula for alkanes?

CnH2n+2

7

What bonds are found in alkanes?

Single covalent

8

Formula of propane

C3H8

9

Formula of butane

C4H10

10

One use of LPG

Heating

11

Unsaturated hydrocarbon example

C2H4

12

Formula of propane?

C3H6

13

What would happen if bromine was present?

Orange/brown to colourless

14

What two functional groups are in amino acids?

Anime and carboxylic acids

15

What catalyst is used in fermentation?

Yeast

16

What is a diol?

Alcohol with two hydroxyl groups

17

Catalyst used in ammonia

Iron

18

Why do manufacturers want to increase rate of reactions

Reduce energy costs

19

How do catalysts work

Add surface area for molecule to attach to

20

One use of diesal

Fuel for cars

21

Property of short-chain hydrocarbons

Gases or volatile liquids

22

Unsaturated meaning

Contains double bonds

23

Test to identity alkane from Allene

Add bromine water
Alkanes-colourless
Alkanes-no reaction

24

Catalyst used to form alkane molecules

Nickel

25

What compound is CH3CH2CH2OH

Alcohol

26

What is a dicarboxylic acid?

Molecule with 2 carboyxlic acid groups

27

What is the functional group of CH3CH2COOH

COOH

28

What is the pH of a COOH

Less than 7

29

Use of thermosetting

Cooking utensils

30

Why does thermosetting not soften when heated

Cross links between polymer chains

31

What does pure mean

One type of element/compound

32

Melts at 34 is it pure

Yes only has one melting point

33

Disadvantages of flame test

Some colours may mask others in compound

34

Why is no Rome wire used

Doesn’t melt

35

What planet has similar atmosphere to Earth before

Venus

36

What does CCS stand for

Carbon capture and storage

37

What does CCS do

Stops CO2 going into air

38

What does carbon neutral mean?

No overall increase in CO2

39

How does climate change affect rainfall

Some increase,some decrease

40

What is fresh water?

Low levels of salt and microorganisms

41

What can sterilise water?

Ozone

42

What’s an ore

Naturally occurring rock containing metal

43

What is smelting

Ore heated with carbon which is more reactive

44

What is bioleaching?

Bacteria used to remove metal from leachapt solution

45

Why is aluminium not protected?

Creates layer of aluminium oxide which protects metal

46

Why is high pressure used?

Higher pressure increases yield

47

Why use fertilisers?

Replace nutrients in soil

48

Why must fertilisers be soluble?

Taken up by roots of plant

49

What is in NPK fertilisers?

Nitrogen
Phosphorus
Potassium