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chemistry > C4 > Flashcards

C4 Flashcards

1
Q

what are polymers made up of

A

lots of small molecules called monomers

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2
Q

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

A

polymerisation

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3
Q

what molecule makes up plastics

A

carbon based polymers

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4
Q

what are the make up of addition polymers

A

carbon-carbon double bonds

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5
Q

are unsaturated monomer molecules alkanes or alkenes

A

alkenes

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6
Q

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

A

addition polymerisation

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7
Q

what are the conditions needed to create polymers

A

highpressure and a catalyst

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8
Q

what’s the definition of a unsaturated monomer

A

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

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9
Q

define addition polymerisation

A

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

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10
Q

whats the difference between simple and giant covalent bonds

A

there are no charged ions

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11
Q

what are the ions bonded with

A

strong covalent bonds

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12
Q

what are giant covalent bonds made of

A

carbon atoms

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13
Q

how many covalent bonds does doomed have

A

4 carbon bonds

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14
Q

what are some propitious of Dimond

A

doesn’t conduct electricity and no free electrons

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15
Q

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

A

3

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16
Q

what are some propitious of graphite and graphene

A

free electrons and conducts electricity

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17
Q

name 3 naturally occurring polymers

A

DNA, carbohydrates (starch) and amino acids

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18
Q

how are ceramics made

A

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

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19
Q

name the brittle and stiff material

A

ceramics

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20
Q

what is clay made of

A

clay is a mixture of material made from decomposed rock

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21
Q

name three types of ceramics

A

glass, porcelain and bone china

22
Q

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

A

clay

23
Q

how is clay hardened

A

it is fired at very high temps

24
Q

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

A

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

25
Q

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

A

glass

26
Q

how is soda-lime glass made

A

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

27
Q

what is the most common type of glass

A

soda-lime glass

28
Q

describe a composite

A

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

29
Q

describe a carbon fibre composite

A

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

30
Q

give examples of a carbon fibre composite

A

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

31
Q

what are the most common natural polymers

A

silk and wool

32
Q

what are the most common unnatural polymers

A

polyester and polythene

33
Q

what are metals good conductors of

A

heat and electricity

34
Q

true or false group 1 metals are soft

A

true

35
Q

why do elements in group 1 share similar chemical properties

A

they each have one electron in the outer shell

36
Q

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

A

sodium chloride and hydrogen gas

37
Q

what is the appearance of iodine at room temp

A

dark grey crystalline solid

38
Q

what is the charge on a halide ion

A

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

39
Q

which is most reactive
fluorine
bromine
iodine

A

fluorine

40
Q

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

A

false

41
Q

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

A

false

42
Q 
noble gases are inert this term means they are 
very dense
diatomic
unreactive
flammable
A

unreactive

43
Q

why are noble gases inert

A

as the have full outer shells

44
Q

where are transition metals on the periodic table

A

in the middle

45
Q

true or false transition metals have high density

A

true

46
Q

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

A

true

47
Q

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

A

false

48
Q

what gas is formed when a metal reacts with hydrochloric acid

A

hydrogen gas

49
Q

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

A

calcium is above zinc in the reactivity series

50
Q

how to test for chlorine gas

A

litmus paper

chemistry (5 decks)

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