chem dont know

Question 1

reactivity series mnemonic

Answer 1

Please
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Lions
Cats
Monkeys
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General

Question 2

reactivity series

Answer 2

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Hydrogen
Copper
Silver
Gold

Question 3

cast iron

Answer 3

• hard / brittle
• not compressed
  stoves / drains / engines

Question 4

low carbon

Answer 4

• easily shaped
  car bodies / domestic goods

Question 5

stainless

Answer 5

• hard
• resistant to corrosion
  cutlery / sinks / tools

Question 6

high carbon

Answer 6

• hard
  cutting tools

Question 7

iron

Answer 7

• hard and thought
• rolled into sheets / cut
  machinery / tools / car bodies / cutlery

Question 8

aluminium

Answer 8

• conducts elec / heat
• malleable
• high mtp
• low density
• resists corrosion
  aircraft / trains / saucepans

Question 9

copper

Answer 9

• conducts heat / elec
• malleable
• high mtp
• ductile
• unreactive
  electric cabling /plumbing pipes

Question 10

CO2 test equation

Answer 10

Ca(OH)2 + CO2 > CaCO3 + H2O

Question 11

iron 2 vs iron 3 - test

Answer 11

green vs brown

Question 12

ammonium + UI

Answer 12

blue

Question 13

crude oil trends as you go down

Answer 13

bp ^
viscosity ^
volatility - decreases
flammability - decreases
colour - darker
size - bigger

Question 14

fraction order

Answer 14

refinery gases
gasoline
kerosene
diesel
fuel oil
bitumen

Question 15

alkAne + halogen

Answer 15

UV light
SUBSTITUTION
> bromoethane + hydrogen bromine

Question 16

alkEne + halogen

Answer 16

> bromoethane
room temp
ADDITION

Question 17

aluminium electrolysis - how is operating temp kept low

Answer 17

AlO dissolved in cryolite

Question 18

why lid in chromatography

Answer 18

decreases evaporation of solvent
decreases toxic fumes

Question 19

N2 uses

Answer 19

food packaging
aircraft tires
makes ammonia - haber processes

Question 20

CaCl2

Answer 20

slightly soluble

Question 21

why petrol causes acid rain

Answer 21

nitrogen or sulphur IN AIR oxidises to make NO2 / SO2 which dissolves in water to make acid rain

Question 22

molten substance in a blast furnace is called

Answer 22

slag

Question 23

iron ore source

Answer 23

haematite

Question 24

haematite compound

Answer 24

FeO

Question 25

limestone compound

Answer 25

CaCO3

Question 26

iron blast furnace raw materials

Answer 26

coke limestone

Question 27

phytoextraction

Answer 27

- some plants absorb metal compounds through roots - concentrate compounds because of it - plants burnt to make ash that contains metal compounds -

Question 28

bacterial extraction

Answer 28

- bacteria absorb metal compounds - produce solutions called leachates which contain metals