Extraction of Metals

By Angela Toh

S4 Pure Chemistry - Extraction of Metals

Multiple Choice

In this reactivity series, which of the following is the most reactive element?

• Gold

• Calcium

• Zinc

• Potassium

Multiple Choice

Metal A is more reactive than Metal B. The following displacement reaction takes place.

Metal A + Metal B in compound ---> Metal B + Metal A in compound.

True or False.

• True

• False

Multiple Choice

If the metal is more reactive than the metal in the compound it completes with the less reactive metal. Therefore, it can concluded that ...

• The less reactive metal repel the more reactive metal from its compound
• The more reactive metal bonded with  the less reactive metal from its compound
• The less reactive metal pushes out or displaces the more reactive metal from its compound
• The more reactive metal pushes out or displaces the less reactive metal from its compound

Multiple Choice

Which of the following will not undergo reaction?

• zinc metal  +  zinc oxide 
• iron metal  +  copper oxide
• zinc metal +  iron oxide
• magnesium  +  iron oxide

Multiple Choice

The reactivity series of metals is applied in the ............. of the metals from their ore.

• Melting

• Extraction

• Freezing

• Crystalization

Multiple Choice

Use the following observations to select the correct reactivity series (highest to lowest).

calcium + water: slow

sodium + water: fast

calcium + dilute acid: very fast

gold + dilute acid: no reaction

aluminium + dilute acid: fast

• calcium, sodium, aluminium, gold

• sodium, calcium, aluminium, gold

• sodium, aluminium, calcium, gold

• gold, aluminium, calcium, sodium

Multiple Select

Many metals are extracted from their ores by heating them with carbon in huge furnaces. Which metal(s) cannot be extracted using this method?

• Aluminum

• Calcium

• Zinc

• Copper

Multiple Choice

How could you extract sodium from molten sodium chloride?

• reduction by carbon
• electrolysis
• decomposition
• oxidation

Multiple Choice

What is the name of the process that uses electricity to separate the elements in a compound?

• reduction

• electrolysis

• extraction

• mining

Multiple Select

Which of these elements are unlikely to be found uncombined in the earth's crust?

• gold

• potassium

• aluminium

• silver

Multiple Choice

Which element cannot be extracted from its ore by reduction with carbon?

• iron

• aluminium

• copper

• zinc

Multiple Choice

Which series is used to predict the reactions of metals with carbon and other elements?

• reactionary series
• reaction series
• redox series
• reactivity series

Multiple Choice

How would you best extract iron from haematite (iron ore)?

• reduction by carbon

• electrolysis

• decomposition

• oxidation

Multiple Choice

What is an ore?

• a solid metal
• a rock cantaining a metal combined with other elements
• an element
• an object used to row a boat

Multiple Choice

What is the purpose of adding iron ore?

• As a source of iron

• To remove impurities

• To react with coke to form carbon monoxide

• To reduce iron oxide to iron

Multiple Choice

What is the purpose of adding coke?

• As a source of iron

• To remove impurities

• To react with coke to form carbon monoxide

• To reduce iron oxide to iron

Multiple Choice

What is the purpose of adding limestone?

• As a source of iron

• To remove impurities

• To react with coke to form carbon monoxide

• To reduce iron oxide to iron

Multiple Choice

What is the purpose of adding hot air?

• As a source of iron

• To remove impurities

• To react with coke to form carbon monoxide

• To reduce iron oxide to iron

Multiple Choice

What is the removal of oxygen from a substance called?

• reduction
• extraction
• electrolysis
• oxidation

Multiple Choice

How would you best extract iron from haematite (iron ore)?

• reduction by carbon
• electrolysis
• decomposition
• oxidation

Multiple Select

Which are the correct 4 Raw Materials used in a blast furnace?

• Hot Air

• Coke

• Limestone

• Iron Ore

• Cryolite

Multiple Choice

Which gas reduces iron ore?

• CO

• CO₂

• O₂

• C

Multiple Choice

What is the name for the waste products formed in the Blast Furnace?

• Slag

• Debris

• Haematite

• Cryolite

Multiple Select

Which 2 equations correctly show the formation of carbon monoxide in the blast furnace?

• C_(s) + O_2(g) -----> CO₂(g)

• 2C_(s) + O_2(g) -----> 2CO₂(g)

• C_(s) + CO_2(g) -----> CO(g)

• C_(s) + CO_2(g) -----> 2CO(g)

Multiple Select

Which 2 equations correctly show the formation of iron in the blast furnace?

• Fe₂O_3(s) + 3CO_(g) -----> 3CO₂(g) + 2Fe_(s)

• 2Fe₂O_3(s) + 6CO_(g) -----> 6CO₂(g) + 2Fe_(s)

• Fe₂O_3(s) + 3C_(s) -----> 3CO₂(g) + 2Fe_(s)

• Fe₂O_3(s) + 3C_(s) -----> 3CO(g) + 2Fe_(s)

Multiple Select

Which 2 equations correctly show the formation of slag in the blast furnace?

• CaCO_3(s) -----> CO₂(g) + CaO_(s)

• CaCO_3(s) -----> CO(g) + CaO_2(s)

• CaO_2(s) + SiO_(s) -----> CaSiO_3(s)

• CaO_(s) + SiO_2(s) -----> CaSiO_3(s)

Multiple Choice

Steel is ... than iron

• stronger

• weaker

Multiple Choice

In order to make steel stronger, ... is added

• carbon

• coal

Multiple Choice

Steel which doesn't rust is called...

• stainless steel

• rust-free steel

Multiple Choice

steel can be used to produce wires because it is...

• brittle

• ductile

Multiple Choice

Stainless steel is so called because of its -------------------

• High strength

• High corrosion resistance

• High ductility

• Brittleness

Multiple Choice

Which is the primary element used for making stainless steel alloy?

• Chromium

• Zirconium

• Vanadium

• Indium

Multiple Choice

Which conditions are necessary to make mild steel from iron?

• add calcium oxide and blow oxygen through it

• heat with calcium oxide

• heat with carbon and limestone

• heat with nickel and chromium

Multiple Choice

Which metals rusts?

• Copper

• manganese

• iron

• potassium

Multiple Choice

A rusting bicycle

• physical change

• chemical change

Multiple Choice

What environmental element assists rusting?

• nitrogen

• oxygen

• carbon

• hydrogen

Multiple Choice

What conditions are required for rusting?

• dry cold conditions

• dry hot conditions

• hot damp conditions

Multiple Choice

Which of the test tube(s) in Diagram will iron nail rust?

• X only

• Y only

• X and Z only

• Y and Z only

Multiple Choice

Which nail rusts first?

• Nail in test tube A

• Nail in test tube C

• Nail in test tube E

• Nail in test tube F

Multiple Choice

Which metal when attached to an iron nail will cause the iron nail to corrode fastest?

• Magnesium

• Silver

• Lead

• Tin

Multiple Choice

What prevents Rusting

• Painting , Oiling , Galvinising

• Washing with water

Multiple Choice

How do you prevent this food can from rusting?

• painting

• apply oil or grease

• coating with plastic

• plating with a less reactive metal

Multiple Choice

Which of the following does not prevent rusting of iron?

• Painting , Oiling , Galvinising

• Attach to a piece of copper

• connect to a piece of magnesium with wire

• cover entirely with copper

Multiple Choice

What is recycling?

• putting an object into a recycling bin

• making something new out of resources that have already been used

• using an object again, either for its original purpose or a different purpose

Multiple Choice

How are metals recycled?

• They are washed and then broken into small pieces. The pieces are then melted and made into new things.

• They are washed in soapy water. It is then mixed and rolled out before being left to dry.

Multiple Select

Which two of these resources are finite?

• fossil fuels

• oxygen

• metal ore

• fresh water

Multiple Choice

Why is recycling so important?

• The world's resources are unlimited.

• The world's resources are unprotected.

• The world's resources are illegitimate.

• The world's resources are limited.

Multiple Choice

Is it recyclable?

• Yes

• No

Multiple Select

What are the advantages of recycling metals? Select all correct options.

• Conserves metals as they are finite resources.

• Reduces waste and problems in its disposal.

• Takes time to collect and sort waste metals.

• Reduces pollution due to extraction activities.