C4

Question 1

what are polymers made up of

Answer 1

lots of small molecules called monomers

Question 2

name the reaction when small molecules come together and create a polymers

Answer 2

polymerisation

Question 3

what molecule makes up plastics

Answer 3

carbon based polymers

Question 4

what are the make up of addition polymers

Answer 4

carbon-carbon double bonds

Question 5

are unsaturated monomer molecules alkanes or alkenes

Answer 5

alkenes

Question 6

when unsaturated monomer molecules open up their double bonds and join together to form polymer chains what is this called

Answer 6

addition polymerisation

Question 7

what are the conditions needed to create polymers

Answer 7

highpressure and a catalyst

Question 8

what’s the definition of a unsaturated monomer

Answer 8

those molecules that have double bonds e.g. carbon-carbon double bonds

Question 9

define addition polymerisation

Answer 9

when unsaturated monomer molecules open up their double bonds and join together to form polymer chains

Question 10

whats the difference between simple and giant covalent bonds

Answer 10

there are no charged ions

Question 11

what are the ions bonded with

Answer 11

strong covalent bonds

Question 12

what are giant covalent bonds made of

Answer 12

carbon atoms

Question 13

how many covalent bonds does doomed have

Answer 13

4 carbon bonds

Question 14

what are some propitious of Dimond

Answer 14

doesn’t conduct electricity and no free electrons

Question 15

how many covalent bonds does graphite and graphene have per carbon atom

Answer 15

3

Question 16

what are some propitious of graphite and graphene

Answer 16

free electrons and conducts electricity

Question 17

name 3 naturally occurring polymers

Answer 17

DNA, carbohydrates (starch) and amino acids

Question 18

how are ceramics made

Answer 18

they are made by baking substances like clay to make brittle stiff materials

Question 19

name the brittle and stiff material

Answer 19

ceramics

Question 20

what is clay made of

Answer 20

clay is a mixture of material made from decomposed rock

Question 21

name three types of ceramics

Answer 21

glass, porcelain and bone china

Question 22

what is a soft and wet material often used in making pottery

Answer 22

clay

Question 23

how is clay hardened

Answer 23

it is fired at very high temps

Question 24

describe the propitious of clay after is has been fired at high temps.
soft and easy to mould or hard with high and compressive strength able to stand the weight of lots of bricks mating it a good building material

Answer 24

clay after being fired after high temperature has a high compressive strength so used as building material and can constant lots of weight

Question 25

name the material that is transparent and strong but can be moulded when hot but brittle when thin

Answer 25

glass

Question 26

how is soda-lime glass made

Answer 26

it is made when you melt lime, sand and sodium carbonate and when cooled is formed to be glass

Question 27

what is the most common type of glass

Answer 27

soda-lime glass

Question 28

describe a composite

Answer 28

when a material is embedded into another material to reinforce the matrix

Question 29

describe a carbon fibre composite

Answer 29

a carbon fibre composite is carbon atoms atoms bondened together to create carbon fibre

Question 30

give examples of a carbon fibre composite

Answer 30

aeroplanes and high performance cars as they are light and low density

Question 31

what are the most common natural polymers

Answer 31

silk and wool

Question 32

what are the most common unnatural polymers

Answer 32

polyester and polythene

Question 33

what are metals good conductors of

Answer 33

heat and electricity

Question 34

true or false group 1 metals are soft

Answer 34

true

Question 35

why do elements in group 1 share similar chemical properties

Answer 35

they each have one electron in the outer shell

Question 36

a piece of sodium is added to some dilute hydrochloric acid and a reaction takes place what are 2 products of this reaction

Answer 36

sodium chloride and hydrogen gas

Question 37

what is the appearance of iodine at room temp

Answer 37

dark grey crystalline solid

Question 38

what is the charge on a halide ion

Answer 38

they need to gain 1 electron to complete outer shell so they form 1 ions

Question 39

which is most reactive fluorine bromine iodine

Answer 39

fluorine

Question 40

true or false in a halogen displacement reaction a less reactive halogen will displace a more reactive halogen from a halide compound

Answer 40

false

Question 41

true or false all elements in group 0 are brightly coloured gases

Answer 41

false

Question 42

``` noble gases are inert this term means they are very dense diatomic unreactive flammable ```

Answer 42

unreactive

Question 43

why are noble gases inert

Answer 43

as the have full outer shells

Question 44

where are transition metals on the periodic table

Answer 44

in the middle

Question 45

true or false transition metals have high density

Answer 45

true

Question 46

true or false the easier it is for a metal to form a positive the more reactive it is

Answer 46

true

Question 47

true or false gas is emitted very slowly when a reactive metal reacts with water

Answer 47

false

Question 48

what gas is formed when a metal reacts with hydrochloric acid

Answer 48

hydrogen gas

Question 49

calcium can displace zinc from a zinc salt solution what does this tell you about the reactivity series

Answer 49

calcium is above zinc in the reactivity series

Question 50

how to test for chlorine gas

Answer 50

litmus paper