Why is the iron nail in tube B not rusting?

Boiling the water removes dissolved oxygen.

Why are alloys usually stronger than pure metals?

Layers of ions can't slide over each other

Why are gold alloys used to make jewellery?

They are less malleable than pure gold

A mixture of a metal and at least one other element (often another metal)

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Edexcel 9-1 GCSE Chemistry Transition metals, alloys and corrosion

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Separate Chemistry: Transition metals, Alloys, Corrosion

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Questions 15

Answers

1
Why is the iron nail in tube B not rusting?
There is no salt in the water.
The water is too pure.
Boiling the water removes dissolved oxygen.
The water is too hot.
2
What is duralium and magnalium used for?
Building bridges
Making bullet proof jackets
Making taps
Making aircraft
3
Which two are examples of transition metals
iron and gold
mercury and sodium
sodium and gold
copper and magnesium
4
Which is not a reason to electroplate
To stop corrosion
So less of the expensive metal is used
To use up all the copper
To improve appearance
5
Why are alloys usually stronger than pure metals?
Layers of ions can't slide over each other
Layers of electrons can't slide over each other
Layers of ions can't slide over each other
Layers of protons can't slide over each other
6
Which of the following is not a property of transition metals
Insulator
High melting points
Form coloured compounds
Catalytic Activity
7
Where are the transition metals found in the periodic table
Between group 2 and 3
Group 8
Group 7
Group 1 and 2
8
Which is not a reason we alloy materials
To make them stronger
To make them corrode faster
To make them corrosion resistant
To change the properties
9
Why are gold alloys used to make jewellery?
So it doesn't itch
They are less malleable than pure gold
So it doesn't corrode
They are more expensive than pure gold
10
Which is not a use of brass?
To make decorative door fittings
To make musical instruments
To make the pins in electrical plugs
To make electrical wires
11
What is galvanising?
Painting iron
Electroplating iron with zinc
Electrolysis of iron
Electroplating iron with copper
12
What is rusting
Corrosion of a metal
corrosion of zinc
corrosion of gold
corrosion of iron
13
which is not a method to prevent corrosion
painting or oiling
electroplating
galavanting
sacrificial protection
14
When an element has been oxidised what has it reacted with?
Sulfur
Nitrogen
Ozone
Oxygen
15
What is an alloy?
Two or more different elements chemically combined
A mixture of a metal and a non-metal
A mixture of a metal and at least one other element (often another metal)
A pure metal

Edexcel 9-1 GCSE Chemistry Transition metals, alloys and corrosion Flashcards | StudBud