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Exam questions

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

Thermal decomposition define

Back (Answer)

Break down of substances chemically using heat

#2
Front (Question)

1 advantage of recycling iron

Back (Answer)

Conserve iron ore

#3
Front (Question)

Steel is made of…

Back (Answer)

Iron and carbo

#4
Front (Question)

Empirical formula

Back (Answer)

Ratio

#5
Front (Question)

Contact process conditions [3]

Back (Answer)

Temperature: 450c Pressure: 2atm Catalyst: Vanadium oxide

#6
Front (Question)

carbonate formula

Back (Answer)

CO3^-2

#7
Front (Question)

What is hydrogen oxygen fuel cell and what it does [2]

Back (Answer)

1) Hydrogen and oxygen react to form water 2) Turns chemical energy into electrical energy

#8
Front (Question)

pro & con of hydrogen oxygen fuel cell [2]

Back (Answer)

1) Does not produce pollutants 2) Requires energy to make hydrogen which comes from fossil fuels

#9
Front (Question)

Draw exothermic graph

Back (Answer)

Reactant higher than product Negative enthalpy

#10
Front (Question)

Draw endothermic graph

Back (Answer)

Reactant lower than product Positive enthalpy

#11
Front (Question)

Describe process of iron extraction [6] HIGHER TIER!!

Back (Answer)

1) Hematite + coke + limestone 2) Air comes in and carbon + oxygen -> carbon dioxide (Release energy for iron oxide reduction 3) carbon dioxide + carbon -> carbon monoxide (Reducing agent) 4) Iron oxide + carbon monoxide -> Iron + carbon dioxide 5) Lime stone undergo thermal decomposition 6) Calcium oxide reacts with silicon dioxide to form slag

#12
Front (Question)

chemical equation for carbon monoxide formed in iron extraction

Back (Answer)

CO2 + C -> 2CO

#13
Front (Question)

chemical equation for iron displaced

Back (Answer)

Fe2O3 + 3CO → 2Fe + 3CO2

#14
Front (Question)

Lime stone thermal decomposition chemical equation

Back (Answer)

CaCO3 → CaO + CO2

#15
Front (Question)

Slag formation chemical equation

Back (Answer)

CaO + SiO2 → CaSiO3

#16
Front (Question)

What is and what does a catalytic converter do? [2]

Back (Answer)

1) Used in vehicles to remove oxides of nitrogen by converting it into nitrogen 2) The oxygen in oxides of nitrogen comes from the air in the car engine

#17
Front (Question)

Catalyst for ester

Back (Answer)

Sulfuric acid

#18
Front (Question)

First 4 alkanes

Back (Answer)

Ethane Methane Propane Butane

#19
Front (Question)

1dm3 into cm3

Back (Answer)

1000dm3

#20
Front (Question)

Volume (dm3) formula

Back (Answer)

Moles x 24

#21
Front (Question)

Concentration formula

Back (Answer)

Mass/volume

#22
Front (Question)

Which compounds both contribute to acid rain

Back (Answer)

sulphur dioxide oxides of nitrogen

#23
Front (Question)

Why is cryolite used in aluminium extraction

Back (Answer)

Dissolve aluminium oxide

#24
Front (Question)

Indicator for water

Back (Answer)

Cobalt (II) chloride