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Entrepreneurship - Year 8 Flashcards | StudBud
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Entrepreneurship - Year 8
Entrepreneurship - Year 8
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Metals, reactions with metals , alloys, extraction of metals
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Why is limestone added to the blast furnace?
To remove impurities
To remove waste gases
To improve the scent
To release energy
2
What is the general trend in reactivity of the metals as you move down a group?
Each group of metal has a different pattern
More reactive at top
More reactive at bottom
3
Bronze is an
alloy
. It is made of both tin and which other element?
Tin
Gold
Potassium
Copper
4
Which metal is at the bottom of the reactivity series?
Gold
Copper
Iron
Potassium
5
Recycling metals saves....
Transport
Money
Jobs
Energy
6
Alloys are mixtures of two or more metals
False
True
7
recycling metals...
all of these are correct
conserves the earth's limited metal ores
reduces the need to mine
prevents pollution from extracting ores
8
Which metal is
NOT
an element?
Gold
Iron
Steel
Copper
9
When a metal like Calcium reacts with water it produces heat, this is called...
A heat-filled reaction
An endothermic reaction
A crazy reaction
An exothermic reaction
10
Which metal reacts slowly with water?
Iron
Gold
Potassium
Copper
11
The reaction of Calcium and water makes calcium hydroxide and what gas?
Hydrogen gas (H2)
Water vapour (H2O)
Carbon Dioxide (CO2)
Oxygen gas (O2)
12
which metal can be extracted in a blast furnace?
lithium
magnesium
aluminium
iron
13
The coke (impure carbon) burns in the blast of hot air to form carbon dioxide.
True
False
14
Use the reactivity series below! Which metal is most reactive?
Gold
Iron
Copper
Potassium
15
Which metal is least reactive?
Gold
Iron
Potassium
Copper
16
True or False?
Metals can be arranged by their reactivity
False
True
17
Which metal would explode in acid?
Iron
Copper
Gold
Potassium
18
At the high temperature at the bottom of the furnace,
carbon dioxide reacts with carbon to produce carbon monoxide
False
True
19
The burning of coke is the main source of heat in the furnace.
True
False
20
Metal Oxides contain Metal and...
oxygen
acids
hydrogen
another metal
21
Alloys are made up of two or more kinds of atom (elements).
False
True
22
What is a blast furnace?
a fireplace
a furnace that uses dynamite to heat
a furnace that uses hot air to extract iron from its ore
it heats homes
23
Which list shows the properties of metals?
malleable, ductile, brittle
dull, insulators & brittle
good conductor of electricity, shiny, malleable
good conductors of heat, dull, shiny
24
Which metal is used for water pipes because it is unreactive?
Copper
Gold
Potassium
Lead
25
What are these Alkali Metals contained in?
Alcohol
Acid
Water
Oil
26
Metals react with what gas in the air to produce metal oxides?
Carbon Dioxide(CO2)
Water vapour (H2O)
Oxygen (O2)
Hydrogen (H2)
